1

Entities/Contracts/AppMainStruct.cs

@@ -76,4 +76,15 @@ namespace Entities.Contracts
 		Option
 	}
 
+
+
+	public enum SubmissionStatus
+	{
+		Pending,        // 待提交/未开始
+		Submitted,      // 已提交
+		Graded,         // 已批改
+		Resubmission,   // 待重新提交 (如果允许)
+		Late,           // 迟交
+		Draft,          // 草稿
+	}
 }

Entities/Contracts/AssignmentQuestion.cs

@@ -31,6 +31,9 @@ namespace Entities.Contracts
 		[Column("question_number")]
 		public byte Index { get; set; }
 
+		[Column("sequence")]
+		public string Sequence { get; set; } = string.Empty;
+
 		[Column("parent_question_group_id")]
 		public Guid? ParentAssignmentQuestionId { get; set; }
 

Entities/Contracts/Submission.cs

@@ -37,7 +37,7 @@ namespace Entities.Contracts
 		public float? OverallGrade { get; set; }
 
 		[Column("overall_feedback")]
-		public string OverallFeedback { get; set; }
+		public string? OverallFeedback { get; set; }
 
 		[Column("graded_by")]
 		[ForeignKey("Grader")]
@@ -66,13 +66,4 @@ namespace Entities.Contracts
 		}
 	}
 
-	public enum SubmissionStatus
-	{
-		Pending,        // 待提交/未开始
-		Submitted,      // 已提交
-		Graded,         // 已批改
-		Resubmission,   // 待重新提交 (如果允许)
-		Late,           // 迟交
-		Draft,          // 草稿
-	}
 }

Entities/Contracts/SubmissionDetail.cs

@@ -31,16 +31,16 @@ namespace Entities.Contracts
 		public Guid AssignmentQuestionId { get; set; }
 
 		[Column("student_answer")]
-		public string StudentAnswer { get; set; }
+		public string? StudentAnswer { get; set; }
 
 		[Column("is_correct")]
 		public bool? IsCorrect { get; set; }
 
 		[Column("points_awarded")]
-		public float? PointsAwarded { get; set; }
+		public float? PointsAwarded { get; set; } // score
 
 		[Column("teacher_feedback")]
-		public string TeacherFeedback { get; set; }
+		public string? TeacherFeedback { get; set; }
 
 		[Column("created_at")]
 		public DateTime CreatedAt { get; set; }
@@ -54,8 +54,10 @@ namespace Entities.Contracts
 		[ForeignKey(nameof(StudentId))]
 		public User Student { get; set; }
 
+		[ForeignKey(nameof(SubmissionId))]
 		public Submission Submission { get; set; }
 
+		[ForeignKey(nameof(AssignmentQuestionId))]
 		public AssignmentQuestion AssignmentQuestion { get; set; }
 
 		public SubmissionDetail()

Entities/DTO/AssignmentClassDto.cs

@@ -0,0 +1,23 @@
+using Entities.Contracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Serialization;
+
+namespace Entities.DTO
+{
+
+
+	public class AssignmentClassDto
+	{
+		public AssignmentDto Assignment { get; set; }
+		public Class ClassId { get; set; }
+		public DateTime AssignedAt { get; set; }
+	}
+
+
+
+
+}

Entities/DTO/AssignmentDto.cs

@@ -1,4 +1,5 @@
-using System;
+using Entities.Contracts;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -6,4 +7,20 @@ using System.Threading.Tasks;
 
 namespace Entities.DTO
 {
+	public class AssignmentDto
+	{
+		public Guid Id { get; set; } = Guid.Empty;
+		public string Title { get; set; } = string.Empty;
+		public string Description { get; set; } = string.Empty;
+
+		public byte TotalQuestions { get; set; }
+		public float Score { get; set; } = 0;
+		public SubjectAreaEnum SubjectArea { get; set; } = SubjectAreaEnum.Unknown;
+		public DateTime CreatedAt { get; set; }
+		public DateTime UpdatedAt { get; set; }
+		public DateTime DueDate { get; set; }
+		public Guid CreatorId { get; set; }
+
+		public AssignmentQuestionDto ExamStruct { get; set; } = new AssignmentQuestionDto();
+	}
 }

Entities/DTO/AssignmentQuestionDto.cs

@@ -15,6 +15,7 @@ namespace Entities.DTO
 
 		public byte Index { get; set; } = 0;
 		public float Score { get; set; } = 0;
+		public string Sequence { get; set; } = string.Empty;
 
 		public Layout Layout { get; set; } = Layout.horizontal;
 		public AssignmentStructType StructType { get; set; } = AssignmentStructType.Question;
@@ -24,4 +25,6 @@ namespace Entities.DTO
 
 		public QuestionDto? Question { get; set; }
 	}
+
+
 }

Entities/DTO/ExamDto.cs

@@ -1,46 +0,0 @@
-using Entities.Contracts;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Xml.Serialization;
-
-namespace Entities.DTO
-{
-	public class AssignmentDto
-	{
-		public Guid Id { get; set; } = Guid.Empty;
-		public string Title { get; set; } = string.Empty;
-		public string Description { get; set; } = string.Empty;
-
-		public byte TotalQuestions { get; set; }
-		public float Score { get; set; } = 0;
-		public SubjectAreaEnum SubjectArea { get; set; } = SubjectAreaEnum.Unknown;
-		public DateTime CreatedAt { get; set; }
-		public DateTime UpdatedAt { get; set; }
-		public DateTime DueDate { get; set; }
-		public Guid CreatorId { get; set; }
-
-		public AssignmentQuestionDto ExamStruct { get; set; } = new AssignmentQuestionDto();
-	}
-
-	public class AssignmentClassDto
-	{
-		public AssignmentDto Assignment { get; set; }
-		public Class ClassId { get; set; }
-		public DateTime AssignedAt { get; set; }
-	}
-
-	public class QuestionContextDto
-	{
-		public Guid Id { get; set; } = Guid.Empty;
-		public string Description { get; set; } = string.Empty;
-	}
-
-	public class OptionDto
-	{
-		public string? Value { get; set; } = string.Empty;
-	}
-
-}

Entities/DTO/QuestionContextDto.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.DTO
+{
+
+	public class QuestionContextDto
+	{
+		public Guid Id { get; set; } = Guid.Empty;
+		public string Description { get; set; } = string.Empty;
+	}
+}

Entities/DTO/QuestionDto.cs

@@ -36,4 +36,13 @@ namespace Entities.DTO
 		public DateTime UpdatedAt { get; set; } = DateTime.Now;
 
 	}
+
+
+	/// <summary>
+	/// Can be removed because the class isn't used
+	/// </summary>
+	public class OptionDto
+	{
+		public string? Value { get; set; } = string.Empty;
+	}
 }

Entities/DTO/StudentDto.cs

@@ -0,0 +1,20 @@
+using Entities.Contracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.DTO
+{
+	public class StudentDto
+	{
+		public Guid Id { get; set; }
+		public string? DisplayName { get; set; }
+
+		public UInt32 ErrorQuestionNum { get; set; }
+		public Dictionary<QuestionType, UInt32> ErrorQuestionTypes { get; set; } = new Dictionary<QuestionType, UInt32>();	
+		public Dictionary<SubjectAreaEnum, UInt32> SubjectAreaErrorQuestionDis { get; set; } = new Dictionary<SubjectAreaEnum, UInt32>();	
+		public Dictionary<byte, UInt32> LessonErrorDis { get; set; } = new Dictionary<byte, UInt32>();	
+	}
+}

Entities/DTO/SubmissionDetailDto.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.DTO
+{
+	public class SubmissionDetailDto
+	{
+		public Guid Id { get; set; } = Guid.Empty;
+		public Guid StudentId { get; set; }
+		public Guid AssignmentQuestionId { get; set; }
+		public string? StudentAnswer { get; set; }
+		public bool? IsCorrect { get; set; }
+		public float? PointsAwarded { get; set; }
+		public string? TeacherFeedback { get; set; }
+	}
+}

Entities/DTO/SubmissionDto.cs

@@ -0,0 +1,23 @@
+using Entities.Contracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.DTO
+{
+	public class SubmissionDto
+	{
+		public Guid Id { get; set; } = Guid.Empty;
+		public Guid AssignmentId { get; set; }
+		public Guid StudentId { get; set; }
+		public DateTime SubmissionTime { get; set; }
+		public float OverallGrade { get; set; } = 0;
+		public string OverallFeedback { get; set; } = string.Empty;
+		public Guid? GraderId { get; set; }
+		public DateTime? GradedAt { get; set; }
+		public SubmissionStatus Status { get; set; }
+		public List<SubmissionDetailDto> SubmissionDetails { get; set; } = new List<SubmissionDetailDto>();
+	}
+}

Entities/DTO/UserDto.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.DTO
+{
+	public class UserDto
+	{
+		public Guid Id { get; set; }
+		public string? DisplayName { get; set; }
+
+	}
+}

TechHelper.Client/Content/AutoMapperProFile.cs

@@ -15,6 +15,9 @@ namespace TechHelper.Context
 			CreateMap<AssignmentQuestionEx, AssignmentQuestionDto>()
 				.ForMember(d=>d.Description, o=>o.Ignore());
 			CreateMap<AssignmentEx, AssignmentDto>();
+
+
+			CreateMap<AssignmentCheckData, Submission>();
 		}
 	}
 

TechHelper.Client/Exam/AssignmentCheckData.cs

@@ -2,18 +2,20 @@
 
 namespace TechHelper.Client.Exam
 {
-	public class ExamStruct
+	public class AssignmentCheckData
 	{
-		public string Title { get; set; } 
+		public string Title { get; set; }
-		public List<QuestionItem> Questions { get; set; } = new List<QuestionItem>(); 
+		public Guid AssignmentId { get; set; }
+		public Guid StudentId { get; set; }
+		public List<AssignmentCheckQuestion> Questions { get; set; } = new List<AssignmentCheckQuestion>();
+	}
 
 
-		public class QuestionItem
+	public class AssignmentCheckQuestion
-		{
+	{
-			public string Sequence { get; set; } = string.Empty;
+		public string Sequence { get; set; } = string.Empty;
-			public string QuestionText { get; set; } = string.Empty;
+		public AssignmentQuestionDto AssignmentQuestionDto { get; set; } = new AssignmentQuestionDto();
-			public float Score { get; set; } 
+		public float Score { get; set; }
-		}
 	}
 
 	public class Student
@@ -24,32 +26,32 @@ namespace TechHelper.Client.Exam
 
 	public class QuestionAnswerStatus
 	{
-		public string QuestionSequence { get; set; } = string.Empty;	// 题目序号，例如 "1.1"
+		public string QuestionSequence { get; set; } = string.Empty;    // 题目序号，例如 "1.1"
-		public string QuestionText { get; set; } = string.Empty;		// 题目文本
+		public string QuestionText { get; set; } = string.Empty;        // 题目文本
-		public float QuestionScore { get; set; }						// 题目分值
+		public float QuestionScore { get; set; }                        // 题目分值
 		public Dictionary<Guid, bool> StudentCorrectStatus { get; set; } = new Dictionary<Guid, bool>();
 		// Key: Student.Id, Value: true 表示正确，false 表示错误
 	}
 
 	public class QuestionRowData
 	{
-		public ExamStruct.QuestionItem QuestionItem { get; set; } // 原始题目信息
+		public AssignmentCheckQuestion QuestionItem { get; set; } // 原始题目信息
 		public Dictionary<Guid, bool> StudentAnswers { get; set; } = new Dictionary<Guid, bool>();
 	}
 
 
 	public static class ExamStructExtensions
 	{
-		public static ExamStruct GetStruct(this AssignmentDto dto)
+		public static AssignmentCheckData GetStruct(this AssignmentDto dto)
 		{
 			if (dto == null)
 			{
-				return new ExamStruct { Title = "无效试卷", Questions = new List<ExamStruct.QuestionItem>() };
+				return new AssignmentCheckData { Title = "无效试卷", Questions = new List<AssignmentCheckQuestion>() };
 			}
 
-			var examStruct = new ExamStruct
+			var examStruct = new AssignmentCheckData
 			{
-				Title = dto.Title 
+				Title = dto.Title
 			};
 
 			GetSeqRecursive(dto.ExamStruct, null, examStruct.Questions);
@@ -65,8 +67,8 @@ namespace TechHelper.Client.Exam
 		/// <param name="allQuestions">用于收集所有生成题目项的列表。</param>
 		private static void GetSeqRecursive(
 			AssignmentQuestionDto currentGroup,
-			string? parentSequence, 
+			string? parentSequence,
-			List<ExamStruct.QuestionItem> allQuestions)
+			List<AssignmentCheckQuestion> allQuestions)
 		{
 			string currentGroupSequence = parentSequence != null
 										? $"{parentSequence}.{currentGroup.Index}"
@@ -76,6 +78,17 @@ namespace TechHelper.Client.Exam
 			{
 				GetSeqRecursive(subGroup, currentGroupSequence, allQuestions);
 			}
+			if (!string.IsNullOrEmpty(currentGroup.Sequence))
+			{
+
+				allQuestions.Add(new AssignmentCheckQuestion
+				{
+					AssignmentQuestionDto = currentGroup,
+					//Sequence = currentGroupSequence,
+					Sequence = currentGroup.Sequence,
+					Score = currentGroup.Score,
+				});
+			}
 		}
 	}
 }

TechHelper.Client/Exam/ExamPaperExtensions .cs

@@ -7,7 +7,7 @@ using AutoMapper;
 
 namespace TechHelper.Client.Exam
 {
-	public static class ExamPaperExtensions
+	public static class AssignmentExtensions
 	{
 
 		public static List<string> ParseOptionsFromText(this string optionsText)
@@ -25,9 +25,9 @@ namespace TechHelper.Client.Exam
 		public static void SeqQGroupIndex(this AssignmentQuestionDto dto)
 		{
 
-			foreach(var sqg in dto.ChildrenAssignmentQuestion)
+			foreach (var sqg in dto.ChildrenAssignmentQuestion)
 			{
-				sqg.Index = (byte)dto.ChildrenAssignmentQuestion.IndexOf(sqg);
+				sqg.Index = (byte)(dto.ChildrenAssignmentQuestion.IndexOf(sqg) + 1);
 				sqg.SeqQGroupIndex();
 
 			}

TechHelper.Client/Exam/ExamParse.cs

@@ -56,6 +56,7 @@ namespace TechHelper.Client.Exam
 		public string Description { get; set; } = string.Empty;
 		public byte Index { get; set; } = 0;
 		public float Score { get; set; }
+		public string Sequence { get; set; } = string.Empty;
 		public QuestionEx? Question { get; set; }
 		public AssignmentStructType Type { get; set; }
 		public List<AssignmentQuestionEx> ChildrenAssignmentQuestion { get; set; } = new List<AssignmentQuestionEx>();
@@ -344,6 +345,8 @@ namespace TechHelper.Client.Exam
 					assignmentQuestionStack.Pop();
 				}
 
+				string sequence = assignmentQuestionStack.Count > 0 ? assignmentQuestionStack.Peek().Sequence : string.Empty;
+
 				// 验证捕获组：Group 1 是编号，Group 2 是题目内容
 				if (pm.RegexMatch.Groups.Count < 3 || !pm.RegexMatch.Groups[1].Success || string.IsNullOrWhiteSpace(pm.RegexMatch.Groups[2].Value))
 				{
@@ -372,6 +375,8 @@ namespace TechHelper.Client.Exam
 				// 提取标题，这里使用 Group 2 的值，它不包含分数
 				string title = pm.RegexMatch.Groups[2].Value.Trim();
 
+				string seq = pm.RegexMatch.Groups[1].Value.Trim();
+				seq = string.IsNullOrEmpty(seq) || string.IsNullOrEmpty(sequence) ? seq : " ." + seq;
 
 				AssignmentQuestionEx newAssignmentQuestion;
 				if (pm.PatternConfig.Type == AssignmentStructType.Struct)
@@ -380,6 +385,7 @@ namespace TechHelper.Client.Exam
 					{
 						Title = title,
 						Score = score,
+						Sequence = sequence + seq,
 						Priority = pm.PatternConfig.Priority,
 						Type = pm.PatternConfig.Type
 					};
@@ -390,6 +396,7 @@ namespace TechHelper.Client.Exam
 					{
 						Priority = pm.PatternConfig.Priority,
 						Type = pm.PatternConfig.Type,
+						Sequence = sequence + seq,
 						Score = score,
 						Question = new QuestionEx
 						{

TechHelper.Client/HttpRepository/AuthenticationClientService.cs

@@ -92,7 +92,6 @@ namespace TechHelper.Client.HttpRepository
 
 		public async Task<ResponseDto> RegisterUserAsync(UserForRegistrationDto userForRegistrationDto)
 		{
-			// 移除 using (_client = _clientFactory.CreateClient("Default"))
 			userForRegistrationDto.ClientURI = Path.Combine(
 				_navigationManager.BaseUri, "emailconfirmation");
 

TechHelper.Client/Pages/Exam/ExamCheck.razor

@@ -9,216 +9,227 @@
 
 @if (_isLoading)
 {
-    <MudProgressCircular Indeterminate="true" Color="Color.Primary" Class="d-flex justify-center my-8" />
+	<MudProgressCircular Indeterminate="true" Color="Color.Primary" Class="d-flex justify-center my-8" />
-    <MudText Class="text-center">正在加载试卷和学生数据...</MudText>
+	<MudText Class="text-center">正在加载试卷和学生数据...</MudText>
 }
 else if (_questionsForTable.Any() && _students.Any())
 {
-    <MudTable @ref="_table" T="QuestionRowData" Items="@_questionsForTable" Hover="true" Breakpoint="Breakpoint.Sm" Class="mud-elevation-2" Dense="true">
+	<MudTable @ref="_table" T="QuestionRowData" Items="@_questionsForTable" Hover="true" Breakpoint="Breakpoint.Sm" Striped="true" Class="mud-elevation-2" Dense="true">
-        <HeaderContent>
+		<HeaderContent>
-            <MudTh Style="width:100px;">序号</MudTh>
+			<MudTh Style="width:100px;">序号</MudTh>
-            <MudTh Style="width:80px; text-align:center;">分值</MudTh>
+			<MudTh Style="width:80px; text-align:center;">分值</MudTh>
-            @foreach (var student in _students)
+			@foreach (var student in _students)
-            {
+			{
-                <MudTh Style="width:120px; text-align:center;">
+				<MudTh Style="width:120px; text-align:center;">
-                    @student.Name
+					@student.DisplayName
-                    <MudTooltip Text="点击以切换此学生所有题目的对错">
+					<MudTooltip Text="点击以切换此学生所有题目的对错">
-                        <MudIconButton Icon="@Icons.Material.Filled.Info" Size="Size.Small" Class="ml-1"
+						<MudIconButton Icon="@Icons.Material.Filled.Info" Size="Size.Small" Class="ml-1"
-                                       @onclick="() => ToggleStudentAllAnswers(student.Id)" />
+						@onclick="() => ToggleStudentAllAnswers(student.Id)" />
-                    </MudTooltip>
+					</MudTooltip>
-                </MudTh>
+				</MudTh>
-            }
+			}
-        </HeaderContent>
+		</HeaderContent>
-        <RowTemplate>
+		<RowTemplate>
-            <MudTd DataLabel="序号">@context.QuestionItem.Sequence</MudTd>
+			<MudTd DataLabel="序号">@context.QuestionItem.Sequence</MudTd>
-            <MudTd DataLabel="分值" Style="text-align:center;">@context.QuestionItem.Score</MudTd>
+			<MudTd DataLabel="分值" Style="text-align:center;">@context.QuestionItem.Score</MudTd>
-            @foreach (var student in _students)
+			@foreach (var student in _students)
-            {
+			{
-                <MudTd DataLabel="@student.Name" Style="text-align:center;">
+				<MudTd DataLabel="@student.DisplayName" Style="text-align:center;">
-                    @if (context.StudentAnswers.ContainsKey(student.Id))
+					@if (context.StudentAnswers.ContainsKey(student.Id))
-                    {
+					{
-                        <MudCheckBox @bind-Value="context.StudentAnswers[student.Id]" Size="Size.Small" Color="Color.Primary"></MudCheckBox>
+						<MudCheckBox @bind-Value="context.StudentAnswers[student.Id]" Size="Size.Small" Color="Color.Primary"></MudCheckBox>
-                    }
+					}
-                    else
+					else
-                    {
+					{
-                        <MudText Color="Color.Warning">N/A</MudText>
+						<MudText Color="Color.Warning">N/A</MudText>
-                    }
+					}
-                </MudTd>
+				</MudTd>
-            }
+			}
-        </RowTemplate>
+		</RowTemplate>
-        <PagerContent>
+		<PagerContent>
-            <MudTablePager />
+			<MudTablePager />
-        </PagerContent>
+		</PagerContent>
-    </MudTable>
+	</MudTable>
 
-    <MudPaper Class="pa-4 mt-4 mud-elevation-2 d-flex flex-column align-end">
+	<MudPaper Class="pa-4 mt-4 mud-elevation-2 d-flex flex-column align-end">
-        <MudText Typo="Typo.h6">学生总分预览:</MudText>
+		<MudText Typo="Typo.h6">学生总分预览:</MudText>
-        @foreach (var student in _students)
+		@foreach (var student in _students)
-        {
+		{
-            <MudText Typo="Typo.subtitle1">
+			<MudText Typo="Typo.subtitle1">
-                @student.Name: <MudText Typo="Typo.h5" Color="Color.Primary" Class="d-inline-block ml-2">@GetStudentTotalScore(student.Id)</MudText>
+				@student.DisplayName: <MudText Typo="Typo.h5" Color="Color.Primary" Class="d-inline-block ml-2">@GetStudentTotalScore(student.Id)</MudText>
-            </MudText>
+			</MudText>
-        }
+		}
-        <MudButton Variant="Variant.Filled" Color="Color.Success" Class="mt-4" @onclick="SubmitGrading">
+		<MudButton Variant="Variant.Filled" Color="Color.Success" Class="mt-4" @onclick="SubmitGrading">
-            提交批改结果 (模拟)
+			提交批改结果 (模拟)
-        </MudButton>
+		</MudButton>
-    </MudPaper>
+	</MudPaper>
 
 }
 else
 {
-    <MudAlert Severity="Severity.Info" Class="mt-4">无法加载试卷或题目信息。</MudAlert>
+	<MudAlert Severity="Severity.Info" Class="mt-4">无法加载试卷或题目信息。</MudAlert>
-    <MudButton Variant="Variant.Text" Color="Color.Primary" Class="mt-4" >返回试卷列表</MudButton>
+	<MudButton Variant="Variant.Text" Color="Color.Primary" Class="mt-4">返回试卷列表</MudButton>
 }
 
 
 @code {
-    [Parameter]
+	[Parameter]
-    public string ExamId { get; set; } 
+	public string ExamId { get; set; }
 
-    [Inject]
+	[Inject]
-    public IExamService ExamService { get; set; } 
+	public IExamService ExamService { get; set; }
 
-    [Inject]
+	[Inject]
-    private ISnackbar Snackbar { get; set; } 
+	private ISnackbar Snackbar { get; set; }
 
-    [Inject]
+	[Inject]
-    private NavigationManager Navigation { get; set; } 
+	private NavigationManager Navigation { get; set; }
 
-    private MudTable<QuestionRowData> _table = new(); 
+	private MudTable<QuestionRowData> _table = new();
-    private AssignmentDto Assignment { get; set; } = new AssignmentDto(); 
+	private AssignmentDto Assignment { get; set; } = new AssignmentDto();
-    private ExamStruct _examStruct = new ExamStruct();
+	private AssignmentCheckData _examStruct = new AssignmentCheckData();
 
-    private List<Student> _students = new List<Student>(); 
+	private List<StudentDto> _students = new List<StudentDto>();
-    private List<QuestionRowData> _questionsForTable = new List<QuestionRowData>();
+	private List<QuestionRowData> _questionsForTable = new List<QuestionRowData>();
 
-    private bool _isLoading = true;
+	private bool _isLoading = true;
+
+	[Inject]
+	public IClassServices ClassServices { get; set; }
+
+	protected override async Task OnInitializedAsync()
+	{
+		_isLoading = true;
+		await LoadExamData();
+
+		var result = await ClassServices.GetClassStudents();
+		if (!result.Status) Snackbar.Add($"获取学生失败, {result.Message}", Severity.Error);
+		_students = result.Result as List<StudentDto> ?? new List<StudentDto>();
+		BuildTable();
+		_isLoading = false;
+	}
+
+	private void BuildTable()
+	{
+		_questionsForTable = _examStruct.Questions.Select(q =>
+		{
+			var rowData = new QuestionRowData
+				{
+					QuestionItem = q,
+					StudentAnswers = new Dictionary<Guid, bool>()
+				};
+			foreach (var student in _students)
+			{
+				rowData.StudentAnswers[student.Id] = false;
+			}
+			return rowData;
+		}).ToList();
+	}
+
+	private async Task LoadExamData()
+	{
+		if (Guid.TryParse(ExamId, out Guid parsedExamId))
+		{
+			try
+			{
+				var result = await ExamService.GetExam(parsedExamId);
+				if (result.Status)
+				{
+					Assignment = result.Result as AssignmentDto ?? new AssignmentDto();
+					_examStruct = Assignment.GetStruct();
+				}
+				else
+				{
+					Snackbar?.Add($"获取试卷失败: {result.Message}", Severity.Error);
+					Navigation.NavigateTo("/exam/manager");
+				}
+			}
+			catch (Exception ex)
+			{
+				Console.Error.WriteLine($"获取试卷时发生错误: {ex.Message}");
+				Snackbar?.Add($"获取试卷失败: {ex.Message}", Severity.Error);
+				Navigation.NavigateTo("/exam/manager");
+			}
+		}
+		else
+		{
+			Console.Error.WriteLine($"错误：路由参数 ExamId '{ExamId}' 不是一个有效的 GUID 格式。");
+			Snackbar?.Add("无效的试卷ID，无法加载。", Severity.Error);
+			Navigation.NavigateTo("/exam/manager");
+		}
+	}
 
 
-    protected override async Task OnInitializedAsync()
+
-    {
+	private float GetStudentTotalScore(Guid studentId)
-        _isLoading = true;
+	{
-        await LoadExamData();
+		float totalScore = 0;
-        GenerateTemporaryStudentsAndAnswers(); 
+		foreach (var row in _questionsForTable)
-        _isLoading = false;
+		{
-    }
+			if (row.StudentAnswers.TryGetValue(studentId, out bool isCorrect) && isCorrect)
+			{
+				totalScore += row.QuestionItem.Score;
+			}
+		}
+		return totalScore;
+	}
+
+	private void ToggleStudentAllAnswers(Guid studentId)
+	{
+		bool allCorrect = _questionsForTable.All(row => row.StudentAnswers.ContainsKey(studentId) && row.StudentAnswers[studentId]);
+
+		foreach (var row in _questionsForTable)
+		{
+			if (row.StudentAnswers.ContainsKey(studentId))
+			{
+				row.StudentAnswers[studentId] = !allCorrect;
+			}
+		}
+		StateHasChanged();
+	}
+
+	private void SubmitGrading()
+	{
+
+		List<SubmissionDto> submissionDto = new List<SubmissionDto>();
 
 
-    private async Task LoadExamData()
+		foreach (var student in _students)
-    {
+		{
-        if (Guid.TryParse(ExamId, out Guid parsedExamId))
+			var newSubmission = new SubmissionDto();
-        {
+			newSubmission.StudentId = student.Id;
-            try
+			newSubmission.AssignmentId = Assignment.Id;
-            {
+			newSubmission.SubmissionTime = DateTime.Now;
-                var result = await ExamService.GetExam(parsedExamId);
+			newSubmission.Status = Entities.Contracts.SubmissionStatus.Submitted;
-                if (result.Status)
-                {
-                    Assignment = result.Result as AssignmentDto ?? new AssignmentDto();
-                    _examStruct = Assignment.GetStruct();
-                }
-                else
-                {
-                    Snackbar?.Add($"获取试卷失败: {result.Message}", Severity.Error);
-                    Navigation.NavigateTo("/exam/manager");
-                }
-            }
-            catch (Exception ex)
-            {
-                Console.Error.WriteLine($"获取试卷时发生错误: {ex.Message}");
-                Snackbar?.Add($"获取试卷失败: {ex.Message}", Severity.Error);
-                Navigation.NavigateTo("/exam/manager");
-            }
-        }
-        else
-        {
-            Console.Error.WriteLine($"错误：路由参数 ExamId '{ExamId}' 不是一个有效的 GUID 格式。");
-            Snackbar?.Add("无效的试卷ID，无法加载。", Severity.Error);
-            Navigation.NavigateTo("/exam/manager");
-        }
-    }
 
-    // 生成临时学生和作答数据
-    private void GenerateTemporaryStudentsAndAnswers()
-    {
-        _students = new List<Student>();
-        // 生成 40 个学生
-        for (int i = 1; i <= 40; i++)
-        {
-            _students.Add(new Student { Name = $"学生{i}" });
-        }
 
-        _questionsForTable = _examStruct.Questions.Select(qItem =>
+			foreach (var row in _questionsForTable)
-        {
+			{
-            var rowData = new QuestionRowData
+				if (row.QuestionItem.AssignmentQuestionDto.StructType == Entities.Contracts.AssignmentStructType.Struct) continue;
-            {
+				if (row.StudentAnswers.TryGetValue(student.Id, out bool isCorrect))
-                QuestionItem = qItem,
+				{
-                StudentAnswers = new Dictionary<Guid, bool>()
+					newSubmission.SubmissionDetails.Add(new SubmissionDetailDto
-            };
+						{
+							IsCorrect = isCorrect,
+							StudentId = student.Id,
+							AssignmentQuestionId = row.QuestionItem.AssignmentQuestionDto.Id,
+							PointsAwarded = isCorrect ? row.QuestionItem.AssignmentQuestionDto.Score : 0
+						});
 
-            // 为每个学生随机生成初始的对错状态
+					newSubmission.OverallGrade += isCorrect ? row.QuestionItem.AssignmentQuestionDto.Score : 0;
-            var random = new Random();
+				}
-            foreach (var student in _students)
+			}
-            {
+			submissionDto.Add(newSubmission);
-                // 模拟随机对错，50%的概率
+		}
-                rowData.StudentAnswers[student.Id] = random.Next(0, 2) == 1;
-            }
-            return rowData;
-        }).ToList();
-    }
 
-    // 当某个学生的某个题目的作答状态改变时触发
+		submissionDto.ForEach(async s =>
-    private void OnAnswerChanged(string questionSequence, Guid studentId, bool isCorrect)
+		{
-    {
+			Snackbar?.Add($"正在提交: {_students.FirstOrDefault(std => std.Id == s.StudentId)?.DisplayName} 的试卷", Severity.Info);
-        // 可以在这里添加额外的逻辑，例如记录更改
+			await ExamService.SubmissionAssignment(s);
-        Console.WriteLine($"题目 {questionSequence}, 学生 {studentId} 的答案变为: {isCorrect}");
+		});
-        // 由于是 @bind-Checked，数据模型已经自动更新，这里只是日志
-    }
 
-    // 计算某个学生的总分
-    private float GetStudentTotalScore(Guid studentId)
-    {
-        float totalScore = 0;
-        foreach (var row in _questionsForTable)
-        {
-            if (row.StudentAnswers.TryGetValue(studentId, out bool isCorrect) && isCorrect)
-            {
-                totalScore += row.QuestionItem.Score;
-            }
-        }
-        return totalScore;
-    }
 
-    // 切换某个学生所有题目的对错状态 (用于快速批改)
-    private void ToggleStudentAllAnswers(Guid studentId)
-    {
-        bool allCorrect = _questionsForTable.All(row => row.StudentAnswers.ContainsKey(studentId) && row.StudentAnswers[studentId]);
 
-        foreach (var row in _questionsForTable)
+		Snackbar?.Add("批改结果已提交（模拟）", Severity.Success);
-        {
+	}
-            if (row.StudentAnswers.ContainsKey(studentId))
-            {
-                row.StudentAnswers[studentId] = !allCorrect; // 全部取反
-            }
-        }
-        StateHasChanged(); // 手动通知 Blazor 刷新 UI
-    }
-
-    // 提交批改结果（模拟）
-    private void SubmitGrading()
-    {
-        Console.WriteLine("--- 提交批改结果 ---");
-        foreach (var student in _students)
-        {
-            Console.WriteLine($"学生: {student.Name}, 总分: {GetStudentTotalScore(student.Id)}");
-            foreach (var row in _questionsForTable)
-            {
-                if (row.StudentAnswers.TryGetValue(student.Id, out bool isCorrect))
-                {
-                    Console.WriteLine($"  - 题目 {row.QuestionItem.Sequence}: {(isCorrect ? "正确" : "错误")}");
-                }
-            }
-        }
-        Snackbar?.Add("批改结果已提交（模拟）", Severity.Success);
-        // 实际应用中，这里会将 _questionsForTable 和 _students 的数据发送到后端API
-    }
 }

TechHelper.Client/Pages/Exam/ExamManager.razor

@@ -49,7 +49,7 @@ else
 	{
 		isloding = true;
 		Snackbar.Add("正在加载", Severity.Info);
-		var result = await ExamService.GetAllExam(authenticationStateTask.Result.User.Identity.Name);
+		var result = await ExamService.GetAllExam();
 		examDtos = result.Result as List<AssignmentDto> ?? new List<AssignmentDto>();
 		isloding = false;
 		Snackbar.Add("加载成功", Severity.Info);

TechHelper.Client/Pages/Exam/ExamPreview.razor

@@ -12,7 +12,11 @@
 
 				<MudButton OnClick="ExamClick"> 详情 </MudButton>
 				<MudIconButton Icon="@Icons.Material.Filled.Delete" aria-label="delete" />
-				<MudIconButton Icon="@Icons.Custom.Brands.GitHub" OnClick="CheckExam" Color="Color.Primary" aria-label="github" />
+				@if (bteacher)
+				{
+					<MudIconButton Icon="@Icons.Material.Filled.Check" OnClick="CheckExam" Color="Color.Primary" aria-label="github" />
+				}
+
 				<MudIconButton Icon="@Icons.Material.Filled.Favorite" Color="Color.Secondary" aria-label="add to favorite" />
 			</MudButtonGroup>
 		</MudPaper>
@@ -21,6 +25,10 @@
 </MudPaper>
 
 @code {
+	[CascadingParameter]
+	private Task<AuthenticationState> authenticationStateTask { get; set; }
+
+	private bool bteacher = false;
 
 	[Inject]
 	public NavigationManager navigationManager { get; set; }
@@ -45,6 +53,12 @@
 	public string? MaxHeight { get; set; } = "64";
 
 
+	protected override Task OnInitializedAsync()
+	{
+		bteacher = authenticationStateTask.Result.User.IsInRole("Teacher");
+		return base.OnInitializedAsync();
+	}
+
 	private void ExamClick()
 	{
 		navigationManager.NavigateTo($"exam/edit/{AssignmentDto.Id}");

TechHelper.Client/Pages/Home.razor

@@ -1,118 +1,10 @@
 @page "/"
 @using Microsoft.AspNetCore.Authorization
 
-<AuthorizeView Roles="Administrator">
+<TechHelper.Client.Pages.Teacher.StudentsView/>
 
-	<MudText> Hello @context.User.Identity.Name</MudText>
-	@foreach (var item in context.User.Claims)
-	{
-		<MudPaper class="ma-2 pa-2">
-			<MudText> @item.Value </MudText>
-			<MudText> @item.Issuer </MudText>
-			<MudText> @item.Subject </MudText>
-			<MudText> @item.Properties </MudText>
-			<MudText> @item.ValueType </MudText>
-		</MudPaper>
-	}
 
-	Welcome to your new app.
+@code {
-</AuthorizeView>
+	[CascadingParameter]
-
+	private Task<AuthenticationState> authenticationStateTask { get; set; }
-<MudText>Hello </MudText>
+}
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>
-<MudText>Hello </MudText>

TechHelper.Client/Pages/Teacher/StudentsView.razor

@@ -0,0 +1,28 @@
+@using Entities.Contracts
+@using Entities.DTO
+@using TechHelper.Client.Services
+<h3>StudentsView</h3>
+
+
+@foreach(var cs in ClassStudents)
+{
+	<MudText> @cs.DisplayName </MudText>
+}
+
+
+@code {
+	[CascadingParameter]
+	private Task<AuthenticationState> authenticationStateTask { get; set; }
+
+	private List<StudentDto> ClassStudents { get; set; } = new List<StudentDto>();
+
+	[Inject]
+	public IClassServices ClassServices { get; set; }
+
+	protected override async Task OnInitializedAsync()
+	{
+		var result = await ClassServices.GetClassStudents();
+		ClassStudents = result.Result as List<StudentDto> ?? new List<StudentDto>();
+		StateHasChanged();
+	}
+}

TechHelper.Client/Services/ClasssServices.cs

@@ -1,6 +1,9 @@
-using Entities.DTO;
+using Entities.Contracts;
+using Entities.DTO;
+using Newtonsoft.Json;
 using System.Net.Http.Json;
 using TechHelper.Client.HttpRepository;
+using TechHelper.Services;
 
 namespace TechHelper.Client.Services
 {
@@ -20,6 +23,21 @@ namespace TechHelper.Client.Services
 			throw new NotImplementedException();
 		}
 
+		public async Task<ApiResponse> GetClassStudents()
+		{
+			try
+			{
+				var result = await _client.PostAsJsonAsync("class/getClassStudents","");
+				var content = await result.Content.ReadAsStringAsync();
+				var users = JsonConvert.DeserializeObject<List<StudentDto>>(content);
+				return ApiResponse.Success(result: users);
+			}
+			catch(Exception ex)
+			{
+				return ApiResponse.Error($"获取失败,{ex.Message}, InnerException: {ex.InnerException}");
+			}
+		}
+
 		public async Task<ResponseDto> UserRegister(UserRegistrationToClassDto userRegistrationToClassDto)
 		{
 			try

TechHelper.Client/Services/ExamService.cs

@@ -9,13 +9,13 @@ namespace TechHelper.Client.Services
 {
 	public class ExamService : IExamService
 	{
-		private readonly IAIService _aIService; 
+		private readonly IAIService _aIService;
-		private readonly HttpClient _client; 
+		private readonly HttpClient _client;
 
-		public ExamService(IAIService aIService, HttpClient client) 
+		public ExamService(IAIService aIService, HttpClient client)
 		{
 			_aIService = aIService;
-			_client = client; 
+			_client = client;
 		}
 
 		public ApiResponse ConvertToXML<T>(string xmlContent)
@@ -86,9 +86,9 @@ namespace TechHelper.Client.Services
 			}
 		}
 
-		public async Task<ApiResponse> GetAllExam(string user)
+		public async Task<ApiResponse> GetAllExam()
 		{
-			var response = await _client.GetAsync($"exam/getAllPreview?user={user}");
+			var response = await _client.GetAsync($"exam/getAllPreview");
 
 			if (response.IsSuccessStatusCode)
 			{
@@ -104,6 +104,25 @@ namespace TechHelper.Client.Services
 			}
 		}
 
+		public async Task<ApiResponse> GetAllSubmission()
+		{
+			try
+			{
+				var response = await _client.GetAsync($"exam/getAllSubmission");
+				if (response.IsSuccessStatusCode)
+				{
+					var content = await response.Content.ReadAsStringAsync();
+					var exam = JsonConvert.DeserializeObject<AssignmentDto>(content);
+					return ApiResponse.Success();
+				}
+				return ApiResponse.Error(message: "获取失败");
+			}
+			catch (Exception ex)
+			{
+				return ApiResponse.Error(message: $"内部错误{ex.Message}, InerEx{ex.InnerException}");
+			}
+		}
+
 		public async Task<ApiResponse> GetExam(Guid guid)
 		{
 
@@ -158,5 +177,18 @@ namespace TechHelper.Client.Services
 				return ApiResponse.Error(message: $"保存试题失败: {response.StatusCode} - {errorContent}");
 			}
 		}
+
+		public async Task<ApiResponse> SubmissionAssignment(SubmissionDto submission)
+		{
+			var response = await _client.PostAsJsonAsync("exam/submission", submission);
+			if (response.IsSuccessStatusCode)
+			{
+				return ApiResponse.Success("提交成功");
+			}
+			else
+			{
+				return ApiResponse.Error("提交失败");
+			}
+		}
 	}
 }

TechHelper.Client/Services/IClassServices.cs

@@ -8,5 +8,6 @@ namespace TechHelper.Client.Services
 	{
 		public Task<ResponseDto> UserRegister(UserRegistrationToClassDto userRegistrationToClassDto);
 		public Task<ResponseDto> CreateClass(UserRegistrationToClassDto userClass);
+		public Task<ApiResponse> GetClassStudents(); 
 	}
 }

TechHelper.Client/Services/IExamService.cs

@@ -11,7 +11,9 @@ namespace TechHelper.Client.Services
 		public Task<ApiResponse> ParseSingleQuestionGroup(string examContent);
 		public ApiResponse ConvertToXML<T>(string xmlContent);
 
-		public Task<ApiResponse> GetAllExam(string user);
+		public Task<ApiResponse> GetAllExam();
 		public Task<ApiResponse> GetExam(Guid guid);
+		public Task<ApiResponse> SubmissionAssignment(SubmissionDto submission);
+		public Task<ApiResponse> GetAllSubmission();
 	}
 }

TechHelper.Server/Context/AutoMapperProFile.cs

@@ -36,20 +36,22 @@ namespace TechHelper.Context
 
 
 
+			// Assignment 
+			CreateMap<AssignmentDto, Assignment>().ReverseMap();
 
-			CreateMap<Assignment, AssignmentDto>();
+			CreateMap<AssignmentQuestionDto, AssignmentQuestion>().ReverseMap();
+
+			CreateMap<QuestionDto, Question>().ReverseMap();
 
 			CreateMap<QuestionContext, QuestionContextDto>().ReverseMap();	
 
-			CreateMap<AssignmentQuestion, AssignmentQuestionDto>();
 
-			CreateMap<Question, QuestionDto>();
 
-			CreateMap<AssignmentDto, Assignment>();
 
-			CreateMap<AssignmentQuestionDto, AssignmentQuestion>();
+			// Submission
+			CreateMap<SubmissionDto, Submission>().ReverseMap();
 
-			CreateMap<QuestionDto, Question>();
+			CreateMap<SubmissionDetailDto, SubmissionDetail>().ReverseMap();	
 
 		}
 	}

TechHelper.Server/Context/Configuration/AssignmentConfiguration.cs

@@ -57,26 +57,13 @@ namespace TechHelper.Context.Configuration
 				   .HasForeignKey(a => a.CreatorId)
 				   .IsRequired(); // CreatedBy 是必填的，对应 [Required] 在外键属性上
 
-			// 关系: Assignment (一) 到 AssignmentClass (多)
-			// 假设 AssignmentClass 实体包含一个名为 AssignmentId 的外键属性
-			builder.HasMany(a => a.AssignmentClasses)
-				   .WithOne(ac => ac.Assignment) // AssignmentClass 没有指向 Assignment 的导航属性 (或我们不知道)
-				   .HasForeignKey("AssignmentId") // 指定外键名称为 AssignmentId
-				   .OnDelete(DeleteBehavior.Cascade); // 如果 Assignment 被删除，关联的 AssignmentClass 也会被删除
 
-			// 关系: Assignment (一) 到 AssignmentAttachment (多)
-			// 假设 AssignmentAttachment 实体包含一个名为 AssignmentId 的外键属性
-			builder.HasMany(a => a.AssignmentAttachments)
-				   .WithOne(aa => aa.Assignment)
-				   .HasForeignKey("AssignmentId")
-				   .OnDelete(DeleteBehavior.Cascade);
 
-			// 关系: Assignment (一) 到 Submission (多)
+			builder.HasOne(a=>a.ExamStruct)
-			// 假设 Submission 实体包含一个名为 AssignmentId 的外键属性
+				.WithOne()
-			builder.HasMany(a => a.Submissions)
+				.HasForeignKey<Assignment>(a=>a.ExamStructId)
-				   .WithOne(s => s.Assignment)
+				.OnDelete(DeleteBehavior.Cascade);
-				   .HasForeignKey("AssignmentId")
+
-				   .OnDelete(DeleteBehavior.Cascade);
 		}
 	}
 }

TechHelper.Server/Context/Configuration/AssignmentQuestionConfiguration.cs

@@ -42,35 +42,24 @@ namespace TechHelper.Context.Configuration
 				.HasColumnName("deleted")
 				.HasDefaultValue(false); // 适用于软删除策略
 
-			// 4. 配置导航属性和外键关系
 
-			// ---
+			builder.HasOne(aq => aq.Question)             
-			// 配置 AssignmentQuestion 到 Question 的关系 (多对一)
+				.WithMany(q => q.AssignmentQuestions)     
-			// 一个 AssignmentQuestion 属于一个 Question。
+				.HasForeignKey(aq => aq.QuestionId)       
-			//
+				.OnDelete(DeleteBehavior.Cascade);        
-			// 假设 `Question` 实体中有一个名为 `AssignmentQuestions` 的 `ICollection<AssignmentQuestion>` 集合属性。
-			builder.HasOne(aq => aq.Question)             // 当前 AssignmentQuestion 有一个 Question
-				.WithMany(q => q.AssignmentQuestions)     // 那个 Question 可以有多个 AssignmentQuestion
-				.HasForeignKey(aq => aq.QuestionId)       // 外键是 AssignmentQuestion.QuestionId
-				.OnDelete(DeleteBehavior.Cascade);        // 当 Question 被删除时，相关的 AssignmentQuestion 也级联删除。
 
+			builder.HasOne(aq => aq.ParentAssignmentQuestion)
+				.WithMany(aq => aq.ChildrenAssignmentQuestion)
+				.HasForeignKey(aq => aq.ParentAssignmentQuestionId)
+				.OnDelete(DeleteBehavior.Cascade);
 
 			builder.HasOne(aq => aq.QuestionContext)
 				.WithMany(qc => qc.Questions)
 				.HasForeignKey(aq => aq.QuestionContextId)
 				.OnDelete(DeleteBehavior.SetNull);
 
-			// ---
-			// 配置 AssignmentQuestion 到 SubmissionDetail 的关系 (一对多)
-			// 一个 AssignmentQuestion 可以有多个 SubmissionDetail。
-			//
-			// 这个关系通常从 "多" 的一方（`SubmissionDetail` 实体）来配置外键。
-			// 假设 `SubmissionDetail` 实体有一个 `AssignmentQuestionId` 外键和 `AssignmentQuestion` 导航属性。
-			builder.HasMany(aq => aq.SubmissionDetails)     // 当前 AssignmentQuestion 有多个 SubmissionDetail
-				.WithOne(sd => sd.AssignmentQuestion);      // 每一个 SubmissionDetail 都有一个 AssignmentQuestion
-															// .HasForeignKey(sd => sd.AssignmentQuestionId); // 外键的配置应在 `SubmissionDetailConfiguration` 中进行
-		}
-	}
-	
 
+		}
+
+	}
 }

TechHelper.Server/Context/Configuration/SubmissionConfiguration.cs

@@ -75,16 +75,13 @@ namespace TechHelper.Context.Configuration
 			builder.HasOne(s => s.Student)             // 当前 Submission 有一个 Student (User)
 				.WithMany(u => u.SubmissionsAsStudent) // 那个 User (Student) 可以有多个 Submission
 				.HasForeignKey(s => s.StudentId)       // 外键是 Submission.StudentId
-				.OnDelete(DeleteBehavior.Restrict);    // 当 User (Student) 被删除时，如果还有其提交的 Submission，则会阻止删除。
+				.OnDelete(DeleteBehavior.Cascade);    // 当 User (Student) 被删除时，如果还有其提交的 Submission，则会阻止删除。
 
 			builder.HasOne(s => s.Grader)              // 当前 Submission 有一个 Grader (User)，可以是空的
 				.WithMany(u => u.GradedSubmissions)    // 那个 User (Grader) 可以批改多个 Submission
 				.HasForeignKey(s => s.GraderId)        // 外键是 Submission.GradedBy
 				.OnDelete(DeleteBehavior.SetNull);     // 当 User (Grader) 被删除时，如果 GradedBy 是可空的，则将其设置为 NULL。
 
-
-			builder.HasMany(s => s.SubmissionDetails)   // 当前 Submission 有多个 SubmissionDetail
-				.WithOne(sd => sd.Submission);          // 每一个 SubmissionDetail 都有一个 Submission
 		}
 	}
 }

TechHelper.Server/Context/Configuration/SubmissionDetailConfiguration.cs

@@ -64,7 +64,7 @@ namespace TechHelper.Context.Configuration
 			builder.HasOne(sd => sd.Student)                     // 当前 SubmissionDetail 有一个 User (作为学生)
 				.WithMany(u => u.SubmissionDetails)		
 				.HasForeignKey(sd => sd.StudentId)            // 外键是 SubmissionDetail.StudentId
-				.OnDelete(DeleteBehavior.Restrict);           // 当 User (学生) 被删除时，如果他/她还有提交详情，则会阻止删除。
+				.OnDelete(DeleteBehavior.Cascade);           // 当 User (学生) 被删除时，如果他/她还有提交详情，则会阻止删除。
 															  // 这是一个更安全的选择，以防止意外数据丢失。
 
 			builder.HasOne(sd => sd.AssignmentQuestion)          // 当前 SubmissionDetail 有一个 AssignmentQuestion

TechHelper.Server/Controllers/ClassController.cs

@@ -1,7 +1,10 @@
-using Entities.DTO;
+using Entities.Contracts;
+using Entities.DTO;
 using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
 using System.Net;
+using System.Security.Claims;
 using TechHelper.Services;
 
 namespace TechHelper.Server.Controllers
@@ -11,25 +14,76 @@ namespace TechHelper.Server.Controllers
 	public class ClassController : ControllerBase
 	{
 		private IClassService _classService;
-
+		private UserManager<User> _userManager;
-		public ClassController(IClassService classService)
+		public ClassController(IClassService classService, UserManager<User> userManager)
 		{
 			_classService = classService;
+			_userManager = userManager;
 		}
 
 		[HttpPost("userRegiste")]
 		public async Task<IActionResult> UserRegisterToClass(
 			[FromBody] UserRegistrationToClassDto toClass)
 		{
-			
+
 			var result = await _classService.UserRegister(toClass);
 
-			if(!result.Status) return BadRequest(result.Message);
+			if (!result.Status) return BadRequest(result.Message);
 
-			return Ok();	
+			return Ok();
 		}
 
 
+
+
+		[HttpPost("getClassStudents")]
+		public async Task<IActionResult> GetClassStudents()
+		{
+			if (User.IsInRole("Teacher"))
+			{
+				var gradeClaim = User.FindFirst("Grade")?.Value;
+				var classClaim = User.FindFirst("Class")?.Value;
+
+				if (string.IsNullOrEmpty(gradeClaim) || string.IsNullOrEmpty(classClaim))
+				{
+					return BadRequest("未识别到你加入的班级信息（年级或班级声明缺失）。");
+				}
+
+				if (!byte.TryParse(gradeClaim, out byte grade) || !byte.TryParse(classClaim, out byte cla))
+				{
+					return BadRequest("你班级或年级信息格式不正确。");
+				}
+
+				var classDto = new ClassDto
+				{
+					Grade = grade,
+					Class = cla
+				};
+
+				var result = await _classService.GetClassStudents(classDto);
+				var css = result.Result as ICollection<ClassStudent>;
+				if(css == null) return BadRequest("你还没有学生");
+
+
+				List<StudentDto> sts = new List<StudentDto>();
+				css?.ToList().ForEach(s => sts.Add(new StudentDto
+				{
+					DisplayName = s.Student.DisplayName,
+					Id = s.Student.Id,
+				}));
+
+				if (!result.Status)
+				{
+					return BadRequest(result.Message);
+				}
+				return Ok(sts);
+			}
+			else
+			{
+				return BadRequest("你没有权限查看，未识别到你的教师身份。");
+			}
+		}
+
 		[HttpPost("Create")]
 		public async Task<IActionResult> Create(
 			[FromBody] ClassDto classDto)

TechHelper.Server/Controllers/ExamController.cs

@@ -6,6 +6,7 @@ using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
 using TechHelper.Server.Services;
 using System.Security.Claims;
+using TechHelper.Services;
 
 
 namespace TechHelper.Server.Controllers
@@ -31,7 +32,7 @@ namespace TechHelper.Server.Controllers
 			[FromBody] AssignmentDto examDto)
 		{
 			var user = await _userManager.FindByEmailAsync(User.Identity?.Name ?? "");
-			if(user == null) return BadRequest("无效的用户");
+			if (user == null) return BadRequest("无效的用户");
 
 			examDto.CreatorId = user.Id;
 			var result = await _examService.CreateExamAsync(examDto);
@@ -45,6 +46,29 @@ namespace TechHelper.Server.Controllers
 			}
 		}
 
+		[HttpPost("submission")]
+		public async Task<IActionResult> SubmissionAssignment(
+			[FromBody] SubmissionDto submissionDto)
+		{
+			if (User == null) return BadRequest("无效的用户");
+			if (User.IsInRole("Teacher"))
+			{
+				var result = await _examService.SubmissionAssignment(submissionDto);
+				if (result.Status)
+				{
+					return Ok(result);
+				}
+				else
+				{
+					return BadRequest(result.Message);
+				}
+			}
+			else
+			{
+				return BadRequest("你没有权限修改");
+			}
+		}
+
 		[HttpGet("get")]
 		public async Task<IActionResult> GetExamById(Guid id)
 		{
@@ -58,16 +82,26 @@ namespace TechHelper.Server.Controllers
 
 
 		[HttpGet("getAllPreview")]
-		public async Task<IActionResult> GetAllExamPreview(string user)
+		public async Task<IActionResult> GetAllExamPreview()
 		{
-			string? userId = User.Identity.Name;
+			if (User == null) return BadRequest("用户验证失败, 无效用户");
 
-			var userid = await _userManager.FindByEmailAsync(user);
+			var userid = await _userManager.FindByEmailAsync(User.Identity.Name);
-			if (userid == null) return BadRequest("用户验证失败, 无效用户");
 
 
-
+			var result = new ApiResponse();
-			var result = await _examService.GetAllExamPreviewsAsync(userid.Id);
+			if (User.IsInRole("Teacher"))
+			{
+				result = await _examService.GetAllExamPreviewsAsync(userid.Id);
+			}
+			else if (User.IsInRole("Student"))
+			{
+				result = await _examService.GetAllSubmissionAsync(userid.Id);
+			}
+			else
+			{
+				return BadRequest("你没有相应的权限");
+			}
 
 			if (result.Status)
 			{
@@ -76,5 +110,34 @@ namespace TechHelper.Server.Controllers
 			return BadRequest(result);
 		}
 
+
+		[HttpGet("getAllSubmission")]
+		public async Task<IActionResult> GetAllSubmission()
+		{
+			if (User == null) return BadRequest("用户验证失败, 无效用户");
+
+			var userid = await _userManager.FindByEmailAsync(User.Identity.Name);
+
+			var result = await _examService.GetAllSubmissionAsync(userid.Id);
+
+			if (result.Status)
+			{
+				return Ok(result.Result);
+			}
+			return BadRequest(result);
+		}
+
+
+		[Authorize(Roles = "Teacher")]
+		[HttpDelete("{guid}")]
+		public async Task<IActionResult> DeleteAsync(Guid guid)
+		{
+			var deleteResult = await _examService.DeleteAsync(guid);
+			if (deleteResult.Status)
+			{
+				return Ok();
+			}
+			return BadRequest();
+		}
 	}
 }

TechHelper.Server/Controllers/UserController.cs

@@ -0,0 +1,30 @@
+using Entities.Contracts;
+using Entities.DTO;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Mvc;
+using TechHelper.Services;
+
+namespace TechHelper.Server.Controllers
+{
+	[Route("api/user")]
+	[ApiController]
+	public class UserController : ControllerBase
+	{
+		private IClassService _classService;
+		private UserManager<User> _userManager;
+		public UserController(IClassService classService, UserManager<User> userManager)
+		{
+			_classService = classService;
+			_userManager = userManager;
+		}
+
+
+		[HttpPost("get")]
+		public async Task<IActionResult> GetAsync(
+			[FromBody] UserRegistrationToClassDto toClass)
+		{
+			return Ok();
+		}
+	}
+}

TechHelper.Server/Migrations/20250625032845_up.cs

@@ -1,95 +0,0 @@
-using System;
-using Microsoft.EntityFrameworkCore.Migrations;
-
-#nullable disable
-
-#pragma warning disable CA1814 // Prefer jagged arrays over multidimensional
-
-namespace TechHelper.Server.Migrations
-{
-    /// <inheritdoc />
-    public partial class up : Migration
-    {
-        /// <inheritdoc />
-        protected override void Up(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropForeignKey(
-                name: "FK_class_teachers_AspNetUsers_teacher_id",
-                table: "class_teachers");
-
-            migrationBuilder.DeleteData(
-                table: "AspNetRoles",
-                keyColumn: "Id",
-                keyValue: new Guid("8b814a50-fd96-4bfa-a666-b247c0f13e22"));
-
-            migrationBuilder.DeleteData(
-                table: "AspNetRoles",
-                keyColumn: "Id",
-                keyValue: new Guid("ab2c8f8c-1ade-4ff5-9eb4-2925a89567b1"));
-
-            migrationBuilder.DeleteData(
-                table: "AspNetRoles",
-                keyColumn: "Id",
-                keyValue: new Guid("c6f92bbf-190f-47a5-b4d6-ed6874a378e8"));
-
-            migrationBuilder.InsertData(
-                table: "AspNetRoles",
-                columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
-                values: new object[,]
-                {
-                    { new Guid("195b19c5-fd30-455c-9f38-9842b44bf5c3"), null, "Teacher", "TEACHER" },
-                    { new Guid("53cc63db-74bc-47a8-b71a-7e120d4018a9"), null, "Administrator", "ADMINISTRATOR" },
-                    { new Guid("a203eb76-97f0-418f-bc06-9549297d2ac3"), null, "Student", "STUDENT" }
-                });
-
-            migrationBuilder.AddForeignKey(
-                name: "FK_class_teachers_AspNetUsers_teacher_id",
-                table: "class_teachers",
-                column: "teacher_id",
-                principalTable: "AspNetUsers",
-                principalColumn: "Id",
-                onDelete: ReferentialAction.Cascade);
-        }
-
-        /// <inheritdoc />
-        protected override void Down(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropForeignKey(
-                name: "FK_class_teachers_AspNetUsers_teacher_id",
-                table: "class_teachers");
-
-            migrationBuilder.DeleteData(
-                table: "AspNetRoles",
-                keyColumn: "Id",
-                keyValue: new Guid("195b19c5-fd30-455c-9f38-9842b44bf5c3"));
-
-            migrationBuilder.DeleteData(
-                table: "AspNetRoles",
-                keyColumn: "Id",
-                keyValue: new Guid("53cc63db-74bc-47a8-b71a-7e120d4018a9"));
-
-            migrationBuilder.DeleteData(
-                table: "AspNetRoles",
-                keyColumn: "Id",
-                keyValue: new Guid("a203eb76-97f0-418f-bc06-9549297d2ac3"));
-
-            migrationBuilder.InsertData(
-                table: "AspNetRoles",
-                columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
-                values: new object[,]
-                {
-                    { new Guid("8b814a50-fd96-4bfa-a666-b247c0f13e22"), null, "Administrator", "ADMINISTRATOR" },
-                    { new Guid("ab2c8f8c-1ade-4ff5-9eb4-2925a89567b1"), null, "Student", "STUDENT" },
-                    { new Guid("c6f92bbf-190f-47a5-b4d6-ed6874a378e8"), null, "Teacher", "TEACHER" }
-                });
-
-            migrationBuilder.AddForeignKey(
-                name: "FK_class_teachers_AspNetUsers_teacher_id",
-                table: "class_teachers",
-                column: "teacher_id",
-                principalTable: "AspNetUsers",
-                principalColumn: "Id",
-                onDelete: ReferentialAction.Restrict);
-        }
-    }
-}

TechHelper.Server/Migrations/20250626073834_init.Designer.cs

@@ -12,8 +12,8 @@ using TechHelper.Context;
 namespace TechHelper.Server.Migrations
 {
     [DbContext(typeof(ApplicationContext))]
-    [Migration("20250625032845_up")]
+    [Migration("20250626073834_init")]
-    partial class up
+    partial class init
     {
         /// <inheritdoc />
         protected override void BuildTargetModel(ModelBuilder modelBuilder)
@@ -512,7 +512,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnName("deleted");
 
                     b.Property<string>("OverallFeedback")
-                        .IsRequired()
                         .HasColumnType("longtext")
                         .HasColumnName("overall_feedback");
 
@@ -579,7 +578,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnName("points_awarded");
 
                     b.Property<string>("StudentAnswer")
-                        .IsRequired()
                         .HasColumnType("longtext")
                         .HasColumnName("student_answer");
 
@@ -592,7 +590,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnName("submission_id");
 
                     b.Property<string>("TeacherFeedback")
-                        .IsRequired()
                         .HasColumnType("longtext")
                         .HasColumnName("teacher_feedback");
 
@@ -747,19 +744,19 @@ namespace TechHelper.Server.Migrations
                     b.HasData(
                         new
                         {
-                            Id = new Guid("a203eb76-97f0-418f-bc06-9549297d2ac3"),
+                            Id = new Guid("3cfe35e8-73d5-4170-9856-f1d078554822"),
                             Name = "Student",
                             NormalizedName = "STUDENT"
                         },
                         new
                         {
-                            Id = new Guid("195b19c5-fd30-455c-9f38-9842b44bf5c3"),
+                            Id = new Guid("754c4967-6af2-4a81-b970-1e90a3a269b3"),
                             Name = "Teacher",
                             NormalizedName = "TEACHER"
                         },
                         new
                         {
-                            Id = new Guid("53cc63db-74bc-47a8-b71a-7e120d4018a9"),
+                            Id = new Guid("8546457c-185c-4b79-bece-bc21e41d02e7"),
                             Name = "Administrator",
                             NormalizedName = "ADMINISTRATOR"
                         });

TechHelper.Server/Migrations/20250626073834_init.cs

@@ -323,7 +323,7 @@ namespace TechHelper.Server.Migrations
                         column: x => x.teacher_id,
                         principalTable: "AspNetUsers",
                         principalColumn: "Id",
-                        onDelete: ReferentialAction.Restrict);
+                        onDelete: ReferentialAction.Cascade);
                     table.ForeignKey(
                         name: "FK_class_teachers_classes_class_id",
                         column: x => x.class_id,
@@ -565,7 +565,7 @@ namespace TechHelper.Server.Migrations
                     attempt_number = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
                     submission_time = table.Column<DateTime>(type: "datetime(6)", nullable: false),
                     overall_grade = table.Column<float>(type: "float", precision: 5, scale: 2, nullable: true),
-                    overall_feedback = table.Column<string>(type: "longtext", nullable: false)
+                    overall_feedback = table.Column<string>(type: "longtext", nullable: true)
                         .Annotation("MySql:CharSet", "utf8mb4"),
                     graded_by = table.Column<Guid>(type: "char(36)", nullable: true, collation: "ascii_general_ci"),
                     graded_at = table.Column<DateTime>(type: "datetime(6)", nullable: true),
@@ -604,11 +604,11 @@ namespace TechHelper.Server.Migrations
                     submission_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
                     student_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
                     assignment_question_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    student_answer = table.Column<string>(type: "longtext", nullable: false)
+                    student_answer = table.Column<string>(type: "longtext", nullable: true)
                         .Annotation("MySql:CharSet", "utf8mb4"),
                     is_correct = table.Column<bool>(type: "tinyint(1)", nullable: true),
                     points_awarded = table.Column<float>(type: "float", precision: 5, scale: 2, nullable: true),
-                    teacher_feedback = table.Column<string>(type: "longtext", nullable: false)
+                    teacher_feedback = table.Column<string>(type: "longtext", nullable: true)
                         .Annotation("MySql:CharSet", "utf8mb4"),
                     created_at = table.Column<DateTime>(type: "datetime(6)", nullable: false)
                         .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
@@ -644,9 +644,9 @@ namespace TechHelper.Server.Migrations
                 columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
                 values: new object[,]
                 {
-                    { new Guid("8b814a50-fd96-4bfa-a666-b247c0f13e22"), null, "Administrator", "ADMINISTRATOR" },
+                    { new Guid("3cfe35e8-73d5-4170-9856-f1d078554822"), null, "Student", "STUDENT" },
-                    { new Guid("ab2c8f8c-1ade-4ff5-9eb4-2925a89567b1"), null, "Student", "STUDENT" },
+                    { new Guid("754c4967-6af2-4a81-b970-1e90a3a269b3"), null, "Teacher", "TEACHER" },
-                    { new Guid("c6f92bbf-190f-47a5-b4d6-ed6874a378e8"), null, "Teacher", "TEACHER" }
+                    { new Guid("8546457c-185c-4b79-bece-bc21e41d02e7"), null, "Administrator", "ADMINISTRATOR" }
                 });
 
             migrationBuilder.CreateIndex(

TechHelper.Server/Migrations/20250627101025_upd.Designer.cs

@@ -12,8 +12,8 @@ using TechHelper.Context;
 namespace TechHelper.Server.Migrations
 {
     [DbContext(typeof(ApplicationContext))]
-    [Migration("20250624103910_init")]
+    [Migration("20250627101025_upd")]
-    partial class init
+    partial class upd
     {
         /// <inheritdoc />
         protected override void BuildTargetModel(ModelBuilder modelBuilder)
@@ -198,6 +198,11 @@ namespace TechHelper.Server.Migrations
                         .HasColumnType("float")
                         .HasColumnName("score");
 
+                    b.Property<string>("Sequence")
+                        .IsRequired()
+                        .HasColumnType("longtext")
+                        .HasColumnName("sequence");
+
                     b.Property<byte>("StructType")
                         .HasColumnType("tinyint unsigned")
                         .HasColumnName("group_state");
@@ -512,7 +517,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnName("deleted");
 
                     b.Property<string>("OverallFeedback")
-                        .IsRequired()
                         .HasColumnType("longtext")
                         .HasColumnName("overall_feedback");
 
@@ -579,7 +583,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnName("points_awarded");
 
                     b.Property<string>("StudentAnswer")
-                        .IsRequired()
                         .HasColumnType("longtext")
                         .HasColumnName("student_answer");
 
@@ -592,7 +595,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnName("submission_id");
 
                     b.Property<string>("TeacherFeedback")
-                        .IsRequired()
                         .HasColumnType("longtext")
                         .HasColumnName("teacher_feedback");
 
@@ -747,19 +749,19 @@ namespace TechHelper.Server.Migrations
                     b.HasData(
                         new
                         {
-                            Id = new Guid("ab2c8f8c-1ade-4ff5-9eb4-2925a89567b1"),
+                            Id = new Guid("c310acf7-9605-4c55-8b9f-9bf9cd2dadb9"),
                             Name = "Student",
                             NormalizedName = "STUDENT"
                         },
                         new
                         {
-                            Id = new Guid("c6f92bbf-190f-47a5-b4d6-ed6874a378e8"),
+                            Id = new Guid("5f0c1b3c-ad05-4ca9-b9fd-a359cb518236"),
                             Name = "Teacher",
                             NormalizedName = "TEACHER"
                         },
                         new
                         {
-                            Id = new Guid("8b814a50-fd96-4bfa-a666-b247c0f13e22"),
+                            Id = new Guid("a81f5de2-9691-45fa-8d31-ae4ffeb34453"),
                             Name = "Administrator",
                             NormalizedName = "ADMINISTRATOR"
                         });
@@ -925,7 +927,8 @@ namespace TechHelper.Server.Migrations
                 {
                     b.HasOne("Entities.Contracts.AssignmentQuestion", "ParentAssignmentQuestion")
                         .WithMany("ChildrenAssignmentQuestion")
-                        .HasForeignKey("ParentAssignmentQuestionId");
+                        .HasForeignKey("ParentAssignmentQuestionId")
+                        .OnDelete(DeleteBehavior.Cascade);
 
                     b.HasOne("Entities.Contracts.QuestionContext", "QuestionContext")
                         .WithMany("Questions")
@@ -985,7 +988,7 @@ namespace TechHelper.Server.Migrations
                     b.HasOne("Entities.Contracts.User", "Teacher")
                         .WithMany("TaughtClassesLink")
                         .HasForeignKey("TeacherId")
-                        .OnDelete(DeleteBehavior.Restrict)
+                        .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
                     b.Navigation("Class");
@@ -1067,7 +1070,7 @@ namespace TechHelper.Server.Migrations
                     b.HasOne("Entities.Contracts.User", "Student")
                         .WithMany("SubmissionsAsStudent")
                         .HasForeignKey("StudentId")
-                        .OnDelete(DeleteBehavior.Restrict)
+                        .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
                     b.Navigation("Assignment");
@@ -1088,7 +1091,7 @@ namespace TechHelper.Server.Migrations
                     b.HasOne("Entities.Contracts.User", "Student")
                         .WithMany("SubmissionDetails")
                         .HasForeignKey("StudentId")
-                        .OnDelete(DeleteBehavior.Restrict)
+                        .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
                     b.HasOne("Entities.Contracts.Submission", "Submission")

TechHelper.Server/Migrations/20250627101025_upd.cs

@@ -0,0 +1,153 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+#pragma warning disable CA1814 // Prefer jagged arrays over multidimensional
+
+namespace TechHelper.Server.Migrations
+{
+    /// <inheritdoc />
+    public partial class upd : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_assignment_questions_assignment_questions_parent_question_gr~",
+                table: "assignment_questions");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_submission_details_AspNetUsers_student_id",
+                table: "submission_details");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_submissions_AspNetUsers_student_id",
+                table: "submissions");
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("3cfe35e8-73d5-4170-9856-f1d078554822"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("754c4967-6af2-4a81-b970-1e90a3a269b3"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("8546457c-185c-4b79-bece-bc21e41d02e7"));
+
+            migrationBuilder.AddColumn<string>(
+                name: "sequence",
+                table: "assignment_questions",
+                type: "longtext",
+                nullable: false)
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.InsertData(
+                table: "AspNetRoles",
+                columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
+                values: new object[,]
+                {
+                    { new Guid("5f0c1b3c-ad05-4ca9-b9fd-a359cb518236"), null, "Teacher", "TEACHER" },
+                    { new Guid("a81f5de2-9691-45fa-8d31-ae4ffeb34453"), null, "Administrator", "ADMINISTRATOR" },
+                    { new Guid("c310acf7-9605-4c55-8b9f-9bf9cd2dadb9"), null, "Student", "STUDENT" }
+                });
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_assignment_questions_assignment_questions_parent_question_gr~",
+                table: "assignment_questions",
+                column: "parent_question_group_id",
+                principalTable: "assignment_questions",
+                principalColumn: "id",
+                onDelete: ReferentialAction.Cascade);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_submission_details_AspNetUsers_student_id",
+                table: "submission_details",
+                column: "student_id",
+                principalTable: "AspNetUsers",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_submissions_AspNetUsers_student_id",
+                table: "submissions",
+                column: "student_id",
+                principalTable: "AspNetUsers",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_assignment_questions_assignment_questions_parent_question_gr~",
+                table: "assignment_questions");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_submission_details_AspNetUsers_student_id",
+                table: "submission_details");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_submissions_AspNetUsers_student_id",
+                table: "submissions");
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("5f0c1b3c-ad05-4ca9-b9fd-a359cb518236"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("a81f5de2-9691-45fa-8d31-ae4ffeb34453"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("c310acf7-9605-4c55-8b9f-9bf9cd2dadb9"));
+
+            migrationBuilder.DropColumn(
+                name: "sequence",
+                table: "assignment_questions");
+
+            migrationBuilder.InsertData(
+                table: "AspNetRoles",
+                columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
+                values: new object[,]
+                {
+                    { new Guid("3cfe35e8-73d5-4170-9856-f1d078554822"), null, "Student", "STUDENT" },
+                    { new Guid("754c4967-6af2-4a81-b970-1e90a3a269b3"), null, "Teacher", "TEACHER" },
+                    { new Guid("8546457c-185c-4b79-bece-bc21e41d02e7"), null, "Administrator", "ADMINISTRATOR" }
+                });
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_assignment_questions_assignment_questions_parent_question_gr~",
+                table: "assignment_questions",
+                column: "parent_question_group_id",
+                principalTable: "assignment_questions",
+                principalColumn: "id");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_submission_details_AspNetUsers_student_id",
+                table: "submission_details",
+                column: "student_id",
+                principalTable: "AspNetUsers",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_submissions_AspNetUsers_student_id",
+                table: "submissions",
+                column: "student_id",
+                principalTable: "AspNetUsers",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+        }
+    }
+}

TechHelper.Server/Migrations/20250627101514_upde.cs

@@ -0,0 +1,71 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+#pragma warning disable CA1814 // Prefer jagged arrays over multidimensional
+
+namespace TechHelper.Server.Migrations
+{
+    /// <inheritdoc />
+    public partial class upde : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("5f0c1b3c-ad05-4ca9-b9fd-a359cb518236"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("a81f5de2-9691-45fa-8d31-ae4ffeb34453"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("c310acf7-9605-4c55-8b9f-9bf9cd2dadb9"));
+
+            migrationBuilder.InsertData(
+                table: "AspNetRoles",
+                columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
+                values: new object[,]
+                {
+                    { new Guid("c0f247ab-b12a-432e-8ce7-d0e28811957e"), null, "Student", "STUDENT" },
+                    { new Guid("f282e759-deb5-4366-aaf1-51366131cf75"), null, "Administrator", "ADMINISTRATOR" },
+                    { new Guid("f9eeea07-eeda-4bbe-a2e4-6aef2f3c7c9a"), null, "Teacher", "TEACHER" }
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("c0f247ab-b12a-432e-8ce7-d0e28811957e"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("f282e759-deb5-4366-aaf1-51366131cf75"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("f9eeea07-eeda-4bbe-a2e4-6aef2f3c7c9a"));
+
+            migrationBuilder.InsertData(
+                table: "AspNetRoles",
+                columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
+                values: new object[,]
+                {
+                    { new Guid("5f0c1b3c-ad05-4ca9-b9fd-a359cb518236"), null, "Teacher", "TEACHER" },
+                    { new Guid("a81f5de2-9691-45fa-8d31-ae4ffeb34453"), null, "Administrator", "ADMINISTRATOR" },
+                    { new Guid("c310acf7-9605-4c55-8b9f-9bf9cd2dadb9"), null, "Student", "STUDENT" }
+                });
+        }
+    }
+}

TechHelper.Server/Migrations/20250627105626_updedd.cs

@@ -0,0 +1,102 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+#pragma warning disable CA1814 // Prefer jagged arrays over multidimensional
+
+namespace TechHelper.Server.Migrations
+{
+    /// <inheritdoc />
+    public partial class updedd : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("c0f247ab-b12a-432e-8ce7-d0e28811957e"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("f282e759-deb5-4366-aaf1-51366131cf75"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("f9eeea07-eeda-4bbe-a2e4-6aef2f3c7c9a"));
+
+            migrationBuilder.AddColumn<Guid>(
+                name: "AssignmentId",
+                table: "assignment_questions",
+                type: "char(36)",
+                nullable: true,
+                collation: "ascii_general_ci");
+
+            migrationBuilder.InsertData(
+                table: "AspNetRoles",
+                columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
+                values: new object[,]
+                {
+                    { new Guid("cf16c215-63f8-4962-8ad0-058274ecf944"), null, "Administrator", "ADMINISTRATOR" },
+                    { new Guid("e3bff43c-36af-497a-971c-ed0a487bdd38"), null, "Student", "STUDENT" },
+                    { new Guid("f05c125e-e70f-40eb-9e19-6e69c3426849"), null, "Teacher", "TEACHER" }
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_assignment_questions_AssignmentId",
+                table: "assignment_questions",
+                column: "AssignmentId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_assignment_questions_assignments_AssignmentId",
+                table: "assignment_questions",
+                column: "AssignmentId",
+                principalTable: "assignments",
+                principalColumn: "id");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_assignment_questions_assignments_AssignmentId",
+                table: "assignment_questions");
+
+            migrationBuilder.DropIndex(
+                name: "IX_assignment_questions_AssignmentId",
+                table: "assignment_questions");
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("cf16c215-63f8-4962-8ad0-058274ecf944"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("e3bff43c-36af-497a-971c-ed0a487bdd38"));
+
+            migrationBuilder.DeleteData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: new Guid("f05c125e-e70f-40eb-9e19-6e69c3426849"));
+
+            migrationBuilder.DropColumn(
+                name: "AssignmentId",
+                table: "assignment_questions");
+
+            migrationBuilder.InsertData(
+                table: "AspNetRoles",
+                columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
+                values: new object[,]
+                {
+                    { new Guid("c0f247ab-b12a-432e-8ce7-d0e28811957e"), null, "Student", "STUDENT" },
+                    { new Guid("f282e759-deb5-4366-aaf1-51366131cf75"), null, "Administrator", "ADMINISTRATOR" },
+                    { new Guid("f9eeea07-eeda-4bbe-a2e4-6aef2f3c7c9a"), null, "Teacher", "TEACHER" }
+                });
+        }
+    }
+}

TechHelper.Server/Migrations/ApplicationContextModelSnapshot.cs

@@ -165,6 +165,9 @@ namespace TechHelper.Server.Migrations
                         .HasColumnType("char(36)")
                         .HasColumnName("id");
 
+                    b.Property<Guid?>("AssignmentId")
+                        .HasColumnType("char(36)");
+
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("datetime(6)")
                         .HasColumnName("created_at");
@@ -195,6 +198,11 @@ namespace TechHelper.Server.Migrations
                         .HasColumnType("float")
                         .HasColumnName("score");
 
+                    b.Property<string>("Sequence")
+                        .IsRequired()
+                        .HasColumnType("longtext")
+                        .HasColumnName("sequence");
+
                     b.Property<byte>("StructType")
                         .HasColumnType("tinyint unsigned")
                         .HasColumnName("group_state");
@@ -206,6 +214,8 @@ namespace TechHelper.Server.Migrations
 
                     b.HasKey("Id");
 
+                    b.HasIndex("AssignmentId");
+
                     b.HasIndex("ParentAssignmentQuestionId");
 
                     b.HasIndex("QuestionContextId");
@@ -509,7 +519,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnName("deleted");
 
                     b.Property<string>("OverallFeedback")
-                        .IsRequired()
                         .HasColumnType("longtext")
                         .HasColumnName("overall_feedback");
 
@@ -576,7 +585,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnName("points_awarded");
 
                     b.Property<string>("StudentAnswer")
-                        .IsRequired()
                         .HasColumnType("longtext")
                         .HasColumnName("student_answer");
 
@@ -589,7 +597,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnName("submission_id");
 
                     b.Property<string>("TeacherFeedback")
-                        .IsRequired()
                         .HasColumnType("longtext")
                         .HasColumnName("teacher_feedback");
 
@@ -744,19 +751,19 @@ namespace TechHelper.Server.Migrations
                     b.HasData(
                         new
                         {
-                            Id = new Guid("a203eb76-97f0-418f-bc06-9549297d2ac3"),
+                            Id = new Guid("e3bff43c-36af-497a-971c-ed0a487bdd38"),
                             Name = "Student",
                             NormalizedName = "STUDENT"
                         },
                         new
                         {
-                            Id = new Guid("195b19c5-fd30-455c-9f38-9842b44bf5c3"),
+                            Id = new Guid("f05c125e-e70f-40eb-9e19-6e69c3426849"),
                             Name = "Teacher",
                             NormalizedName = "TEACHER"
                         },
                         new
                         {
-                            Id = new Guid("53cc63db-74bc-47a8-b71a-7e120d4018a9"),
+                            Id = new Guid("cf16c215-63f8-4962-8ad0-058274ecf944"),
                             Name = "Administrator",
                             NormalizedName = "ADMINISTRATOR"
                         });
@@ -874,7 +881,7 @@ namespace TechHelper.Server.Migrations
                         .IsRequired();
 
                     b.HasOne("Entities.Contracts.AssignmentQuestion", "ExamStruct")
-                        .WithOne("Assignment")
+                        .WithOne()
                         .HasForeignKey("Entities.Contracts.Assignment", "ExamStructId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
@@ -920,9 +927,14 @@ namespace TechHelper.Server.Migrations
 
             modelBuilder.Entity("Entities.Contracts.AssignmentQuestion", b =>
                 {
+                    b.HasOne("Entities.Contracts.Assignment", "Assignment")
+                        .WithMany()
+                        .HasForeignKey("AssignmentId");
+
                     b.HasOne("Entities.Contracts.AssignmentQuestion", "ParentAssignmentQuestion")
                         .WithMany("ChildrenAssignmentQuestion")
-                        .HasForeignKey("ParentAssignmentQuestionId");
+                        .HasForeignKey("ParentAssignmentQuestionId")
+                        .OnDelete(DeleteBehavior.Cascade);
 
                     b.HasOne("Entities.Contracts.QuestionContext", "QuestionContext")
                         .WithMany("Questions")
@@ -934,6 +946,8 @@ namespace TechHelper.Server.Migrations
                         .HasForeignKey("QuestionId")
                         .OnDelete(DeleteBehavior.Cascade);
 
+                    b.Navigation("Assignment");
+
                     b.Navigation("ParentAssignmentQuestion");
 
                     b.Navigation("Question");
@@ -1064,7 +1078,7 @@ namespace TechHelper.Server.Migrations
                     b.HasOne("Entities.Contracts.User", "Student")
                         .WithMany("SubmissionsAsStudent")
                         .HasForeignKey("StudentId")
-                        .OnDelete(DeleteBehavior.Restrict)
+                        .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
                     b.Navigation("Assignment");
@@ -1085,7 +1099,7 @@ namespace TechHelper.Server.Migrations
                     b.HasOne("Entities.Contracts.User", "Student")
                         .WithMany("SubmissionDetails")
                         .HasForeignKey("StudentId")
-                        .OnDelete(DeleteBehavior.Restrict)
+                        .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
                     b.HasOne("Entities.Contracts.Submission", "Submission")
@@ -1163,8 +1177,6 @@ namespace TechHelper.Server.Migrations
 
             modelBuilder.Entity("Entities.Contracts.AssignmentQuestion", b =>
                 {
-                    b.Navigation("Assignment");
-
                     b.Navigation("ChildrenAssignmentQuestion");
 
                     b.Navigation("SubmissionDetails");

TechHelper.Server/Program.cs

@@ -12,6 +12,7 @@ using TechHelper.Features;
 using TechHelper.Services;
 using TechHelper.Server.Services;
 using TechHelper.Server.Repositories;
+using Microsoft.OpenApi.Models;
 
 
 var builder = WebApplication.CreateBuilder(args);
@@ -90,7 +91,35 @@ builder.Services.AddScoped<IExamRepository, ExamRepository>();
 
 
 builder.Services.AddEndpointsApiExplorer();
-builder.Services.AddSwaggerGen();
+builder.Services.AddSwaggerGen(c =>
+{
+	c.SwaggerDoc("v1", new OpenApiInfo { Title = "Your API Name", Version = "v1" });
+
+	c.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
+	{
+		Name = "Authorization", 
+		Type = SecuritySchemeType.Http, 
+		Scheme = "bearer",       
+		BearerFormat = "JWT",   
+		In = ParameterLocation.Header, 
+		Description = "JWT Authorization header using the Bearer scheme. \r\n\r\n Enter 'Bearer' [space] and then your token in the text input below.\r\n\r\nExample: \"Bearer 12345abcdef\"",
+	});
+
+	c.AddSecurityRequirement(new OpenApiSecurityRequirement
+	{
+		{
+			new OpenApiSecurityScheme
+			{
+				Reference = new OpenApiReference
+				{
+					Type = ReferenceType.SecurityScheme,
+					Id = "Bearer" 
+                }
+			},
+			new string[] {}
+        }
+	});
+});
 
 
 builder.Services.AddCors(options =>

TechHelper.Server/Repositories/ExamRepository.cs

@@ -17,7 +17,7 @@ namespace TechHelper.Server.Repositories
 		{
 			_unitOfWork = unitOfWork;
 			_assignmentRepo = _unitOfWork.GetRepository<Assignment>();
-			_assignQuestionRepo = _unitOfWork.GetRepository<AssignmentQuestion>();	
+			_assignQuestionRepo = _unitOfWork.GetRepository<AssignmentQuestion>();
 		}
 
 		public async Task<Assignment?> GetFullExamByIdAsync(Guid assignmentId)
@@ -29,18 +29,18 @@ namespace TechHelper.Server.Repositories
 					i => i.Include(a => a.ExamStruct)
 				);
 
-			result.ExamStruct = await GetNeed(result.ExamStructId)?? null;
+			result.ExamStruct = await GetNeed(result.ExamStructId) ?? null;
 
 			return result;
 		}
 
 
-		public async Task<AssignmentQuestion?> GetNeed(Guid id) 
+		public async Task<AssignmentQuestion?> GetNeed(Guid id)
 		{
 			var result = await _assignQuestionRepo.GetFirstOrDefaultAsync(
 				predicate: aq => aq.Id == id,
 				include: i => i
-					.Include(aq => aq.ChildrenAssignmentQuestion) 
+					.Include(aq => aq.ChildrenAssignmentQuestion)
 					.Include(aq => aq.Question)
 						.ThenInclude(q => q.Lesson)
 					.Include(aq => aq.Question)
@@ -55,13 +55,13 @@ namespace TechHelper.Server.Repositories
 			var loadedChildren = new List<AssignmentQuestion>();
 			foreach (var child in result.ChildrenAssignmentQuestion)
 			{
-				var loadedChild = await GetNeed(child.Id); 
+				var loadedChild = await GetNeed(child.Id);
 				if (loadedChild != null)
 				{
 					loadedChildren.Add(loadedChild);
 				}
 			}
-			result.ChildrenAssignmentQuestion = loadedChildren; 
+			result.ChildrenAssignmentQuestion = loadedChildren;
 
 			return result;
 		}
@@ -90,5 +90,18 @@ namespace TechHelper.Server.Repositories
 		public async Task AddAsync(AssignmentClass assignment)
 		{
 		}
+
+		public async Task AddAsync(Submission submission)
+		{
+			await _unitOfWork.GetRepository<Submission>().InsertAsync(submission);
+		}
+
+		public async Task<IEnumerable<Assignment>> GetAllSubmissionPreviewsByUserAsync(Guid id)
+		{
+			var submissions = await _unitOfWork.GetRepository<Submission>().GetAllAsync(predicate: s => s.StudentId == id, include: i => i.Include(s => s.Assignment));
+			if (submissions == null || !submissions.Any())
+				return Enumerable.Empty<Assignment>();
+			return submissions.ToList().Select(s => s.Assignment).Where(a => a != null).Distinct().ToList();
+		}
 	}
 }

TechHelper.Server/Repositories/IExamRepository.cs

@@ -1,4 +1,5 @@
 using Entities.Contracts;
+using Entities.DTO;
 
 namespace TechHelper.Server.Repositories
 {
@@ -23,6 +24,7 @@ namespace TechHelper.Server.Repositories
 		/// </summary>
 		/// <param name="assignment">要添加的试卷实体。</param>
 		Task AddAsync(Assignment assignment);
+		Task AddAsync(Submission submission);
 
 
 
@@ -32,6 +34,6 @@ namespace TechHelper.Server.Repositories
 		Task AddAsync(Question assignment);
 
 		Task AddAsync(AssignmentClass assignment);
-
+		Task<IEnumerable<Assignment>> GetAllSubmissionPreviewsByUserAsync(Guid id);
 	}
 }

TechHelper.Server/Services/ClassService.cs

@@ -67,15 +67,13 @@ namespace TechHelper.Services
 			}
 		}
 
-		// 实现 IBaseService<ClassDto, int>.GetAllAsync
 		public async Task<ApiResponse> GetAllAsync(QueryParameter query)
 		{
 			try
 			{
 				var repository = _work.GetRepository<Class>();
 
-				// 构建查询条件 (可根据 QueryParameter.Search 进行筛选)
+				Func<IQueryable<Class>, IOrderedQueryable<Class>> orderBy = null;
-				Func<IQueryable<Class>, IOrderedQueryable<Class>> orderBy = null; // 默认不排序
 				if (query.Search != null && !string.IsNullOrWhiteSpace(query.Search))
 				{
 					// 在 Name 字段中进行模糊搜索
@@ -127,9 +125,22 @@ namespace TechHelper.Services
 			}
 		}
 
-		public Task<ApiResponse> GetClassStudents(ClassDto classDto)
+		public async Task<ApiResponse> GetClassStudents(ClassDto classDto)
 		{
-			throw new NotImplementedException();
+			try
+			{
+				var result = await _work.GetRepository<Class>().GetFirstOrDefaultAsync(predicate:
+					c => c.Grade == classDto.Grade && c.Number == classDto.Class,
+					include: i => i
+					.Include(c => c.ClassStudents)
+						.ThenInclude(cs => cs.Student));
+
+				return ApiResponse.Success(result: result.ClassStudents);
+			}
+			catch (Exception ex)
+			{
+				return ApiResponse.Error($"获取学生列表错误, {ex.Message}, {ex.InnerException}");
+			}
 		}
 
 		public async Task<ApiResponse> GetUserClass(Guid id)
@@ -185,9 +196,6 @@ namespace TechHelper.Services
 				var existingClass = await _work.GetRepository<Class>().GetFirstOrDefaultAsync(
 					predicate: (c => c.Number == user.ClassId && c.Grade == user.GradeId));
 
-				// finduser and usrinfo are redundant if they are for the same user.
-				// Let's just use usrinfo
-				// var finduser = await _userManager.FindByEmailAsync(user.User); 
 
 				if (existingClass == null || usrinfo == null) // Simplified check
 				{

TechHelper.Server/Services/ExamService.cs

@@ -57,7 +57,7 @@ namespace TechHelper.Server.Services
 			}
 			catch (Exception ex)
 			{
-				return ApiResponse.Error(ex.Message);	
+				return ApiResponse.Error(ex.Message);
 			}
 		}
 
@@ -78,7 +78,7 @@ namespace TechHelper.Server.Services
 		public async Task<ApiResponse> GetAllExamPreviewsAsync(Guid userId)
 		{
 			var assignments = await _examRepository.GetExamPreviewsByUserAsync(userId);
-			var result =  _mapper.Map<List<AssignmentDto>>(assignments);
+			var result = _mapper.Map<List<AssignmentDto>>(assignments);
 			return ApiResponse.Success(result: result);
 		}
 
@@ -109,11 +109,72 @@ namespace TechHelper.Server.Services
 			throw new NotImplementedException();
 		}
 
-		public Task<ApiResponse> DeleteAsync(Guid id)
+		public async Task<ApiResponse> DeleteAsync(Guid id)
+		{
+			try
+			{
+				var assignment = await _unitOfWork.GetRepository<Assignment>().GetFirstOrDefaultAsync(predicate: a => a.Id == id);
+
+				if (assignment == null) return ApiResponse.Error("找不到该试卷");
+				_unitOfWork.GetRepository<Assignment>().Delete(id);
+				_unitOfWork.GetRepository<AssignmentQuestion>().Delete(assignment.ExamStructId);
+
+
+				if (await _unitOfWork.SaveChangesAsync() > 0)
+				{
+					return ApiResponse.Success();
+				}
+				return ApiResponse.Error("删除失败");
+			}
+			catch (Exception ex)
+			{
+				return ApiResponse.Error("内部问题");
+			}
+		}
+
+		public async Task<ApiResponse> SubmissionAssignment(SubmissionDto submissionDto)
+		{
+			try
+			{
+				var submission = _mapper.Map<Submission>(submissionDto);
+
+				await _examRepository.AddAsync(submission);
+
+				if (await _unitOfWork.SaveChangesAsync() > 0)
+				{
+					return ApiResponse.Success("保存成功");
+				}
+				return ApiResponse.Error("保存失败");
+			}
+			catch (Exception ex)
+			{
+				return ApiResponse.Error($"出现了错误,{ex.Message} innerEx:{ex.InnerException}");
+			}
+		}
+
+		public Task<ApiResponse> AssignmentToAllStudentsAsync(Guid id)
 		{
 			throw new NotImplementedException();
 		}
 
+		public Task<ApiResponse> AssignmentToStudentsAsync(Guid assignementId, Guid studentId)
+		{
+			throw new NotImplementedException();
+		}
+
+		public async Task<ApiResponse> GetAllSubmissionAsync(Guid id)
+		{
+			try
+			{
+				var result = await _examRepository.GetAllSubmissionPreviewsByUserAsync(id);
+				var allExam = _mapper.Map<List<AssignmentDto>>(result);
+				return ApiResponse.Success(result: allExam);
+			}
+			catch (Exception ex)
+			{
+				return ApiResponse.Error($"Submission 内部错误, {ex.Message}");
+			}
+		}
 	}
 
 }

TechHelper.Server/Services/IBaseService.cs

@@ -2,10 +2,10 @@
 {
 	public interface IBaseService<T, TId>
 	{
-		Task<TechHelper.Services.ApiResponse> GetAllAsync(QueryParameter query);
+		Task<ApiResponse> GetAllAsync(QueryParameter query);
-		Task<TechHelper.Services.ApiResponse> GetAsync(TId id);
+		Task<ApiResponse> GetAsync(TId id);
-		Task<TechHelper.Services.ApiResponse> AddAsync(T model);
+		Task<ApiResponse> AddAsync(T model);
-		Task<TechHelper.Services.ApiResponse> UpdateAsync(T model);
+		Task<ApiResponse> UpdateAsync(T model);
-		Task<TechHelper.Services.ApiResponse> DeleteAsync(TId id);
+		Task<ApiResponse> DeleteAsync(TId id);
 	}
 }

TechHelper.Server/Services/IExamService.cs

@@ -22,5 +22,17 @@ namespace TechHelper.Server.Services
 		/// <returns>创建成功的试卷ID</returns>
 		Task<ApiResponse> CreateExamAsync(AssignmentDto examDto);
 
+
+
+		Task<ApiResponse> SubmissionAssignment(SubmissionDto submissionDto);
+
+
+		Task<ApiResponse> AssignmentToAllStudentsAsync(Guid id);
+
+		Task<ApiResponse> AssignmentToStudentsAsync(Guid assignementId, Guid studentId);
+
+
+		Task<ApiResponse> GetAllSubmissionAsync(Guid id);
+
 	}
 }

TechHelper.Server/Services/ISubmissionServices.cs

@@ -0,0 +1,16 @@
+using Entities.Contracts;
+using TechHelper.Services;
+
+namespace TechHelper.Server.Services
+{
+	public interface ISubmissionServices : IBaseService<Submission, Guid>
+	{
+		Task<ApiResponse> GetAssignmentErrorQuestionsAsync(Guid assignmentId, Guid userId);
+		Task<ApiResponse> GetAllErrorQuestionsAsync(Guid userId);
+		Task<ApiResponse> GetAssignmentErrorQuestionTypeDisAsync(Guid assignmentId, Guid userId);
+		Task<ApiResponse> GetAllErrorQuestionTypeDisAsync(Guid assignmentId, Guid userId);
+
+		Task<ApiResponse> GetAssignmentAllStudentsError(Guid assignmentId, Guid teacherId);
+		Task<ApiResponse> GetQuestionErrorStudents(Guid assignmentId);
+	}
+}

TechHelper.Server/Services/IUserSerivces.cs

@@ -0,0 +1,10 @@
+using Entities.Contracts;
+using TechHelper.Services;
+
+namespace TechHelper.Server.Services
+{
+	public interface IUserSerivces : IBaseService<User, Guid>
+	{
+		Task<ApiResponse> GetStudentDetailInfo(Guid userId);
+	}
+}

TechHelper.Server/Services/SubmissionServices.cs

@@ -0,0 +1,91 @@
+using AutoMapper;
+using Entities.Contracts;
+using Microsoft.EntityFrameworkCore;
+using SharedDATA.Api;
+using TechHelper.Services;
+
+namespace TechHelper.Server.Services
+{
+	public class SubmissionServices : ISubmissionServices
+	{
+		private readonly IUnitOfWork _unitOfWork;
+		private readonly IMapper _mapper;
+		private readonly IRepository<Submission> _submissionRepository;
+		private readonly IRepository<SubmissionDetail> _submissionDetailRepository;
+
+		public SubmissionServices(IMapper mapper, IUnitOfWork unitOfWork)
+		{
+			_mapper = mapper;
+			_unitOfWork = unitOfWork;
+			_submissionRepository = _unitOfWork.GetRepository<Submission>();
+			_submissionDetailRepository = _unitOfWork.GetRepository<SubmissionDetail>();
+		}
+
+		public Task<ApiResponse> AddAsync(Submission model)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> DeleteAsync(Guid id)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> GetAllAsync(QueryParameter query)
+		{
+			throw new NotImplementedException();
+		}
+
+		public async Task<ApiResponse> GetAllErrorQuestionsAsync(Guid userId)
+		{
+			try
+			{
+				var errorSDs = await _submissionDetailRepository.GetPagedListAsync(predicate: sd => sd.StudentId == userId && sd.IsCorrect == false,
+					include: i => i
+					.Include(s => s.AssignmentQuestion)
+						.ThenInclude(aq => aq.Question));
+				var errorQuestion = errorSDs.Items.Select(sd => sd.AssignmentQuestion).ToList();
+				return ApiResponse.Success();
+			}
+			catch (Exception ex)
+			{
+				return ApiResponse.Error();
+			}
+		}
+
+		public Task<ApiResponse> GetAllErrorQuestionTypeDisAsync(Guid assignmentId, Guid userId)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> GetAssignmentAllStudentsError(Guid assignmentId, Guid teacherId)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> GetAssignmentErrorQuestionsAsync(Guid assignmentId, Guid userId)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> GetAssignmentErrorQuestionTypeDisAsync(Guid assignmentId, Guid userId)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> GetAsync(Guid id)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> GetQuestionErrorStudents(Guid assignmentId)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> UpdateAsync(Submission model)
+		{
+			throw new NotImplementedException();
+		}
+	}
+}

TechHelper.Server/Services/UserServices.cs

@@ -0,0 +1,38 @@
+using Entities.Contracts;
+using TechHelper.Services;
+
+namespace TechHelper.Server.Services
+{
+	public class UserServices : IUserSerivces
+	{
+		public Task<ApiResponse> AddAsync(User model)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> DeleteAsync(Guid id)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> GetAllAsync(QueryParameter query)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> GetAsync(Guid id)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> GetStudentDetailInfo(Guid userId)
+		{
+			throw new NotImplementedException();
+		}
+
+		public Task<ApiResponse> UpdateAsync(User model)
+		{
+			throw new NotImplementedException();
+		}
+	}
+}