struct&&assiQues

Entities/Contracts/AppMainStruct.cs

@@ -0,0 +1,77 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.Contracts
+{
+	public enum Layout : byte
+	{
+		horizontal = 0,
+		vertical = 1,
+
+		Auto = 2
+	}
+
+	public enum Publisher : byte
+	{
+		Unknown = 0,
+		统编版,
+		部编版,
+	}
+
+	public enum Grade : byte
+	{
+		Unknown = 0,
+		一年级 = 1,
+		二年级 = 2,
+		三年级 = 3,
+		四年级 = 4,
+		五年级 = 5,
+		六年级 = 6
+	}
+
+	public enum DifficultyLevel : byte
+	{
+		easy,
+		medium,
+		hard
+	}
+
+	public enum QuestionType : byte
+	{
+		Unknown = 0,
+		Spelling,           // 拼写
+		Pronunciation,      // 给带点字选择正确读音
+		WordFormation,      // 组词
+		FillInTheBlanks,    // 选词填空 / 补充词语
+		SentenceDictation,  // 默写句子
+		SentenceRewriting,  // 仿句 / 改写句子
+		ReadingComprehension, // 阅读理解
+		Composition         // 作文
+							
+	}
+
+	public enum SubjectAreaEnum : byte
+	{
+		Unknown = 0,         
+		Mathematics,     // 数学
+		Physics,         // 物理
+		Chemistry,       // 化学
+		Biology,         // 生物
+		History,         // 历史
+		Geography,       // 地理
+		Literature,      // 语文/文学
+		English,         // 英语
+		ComputerScience, // 计算机科学
+	}
+
+	public enum QuestionGroupState : byte
+	{
+		Standalone,
+		Group,
+		Subquestion
+	}
+
+}

Entities/Contracts/Assignment.cs

@@ -24,32 +24,36 @@ namespace Entities.Contracts
 		public string Description { get; set; }
 
 		[Column("subject_area")]
-		public string SubjectArea { get; set; }
+		public SubjectAreaEnum SubjectArea { get; set; }
 
 		[Required]
 		[Column("due_date")]
 		public DateTime DueDate { get; set; }
 
 		[Column("total_points")]
-		public float? TotalPoints { get; set; }
+		public byte TotalQuestions { get; set; }
+
+		[Column("score")]
+		public float Score { get; set; }
 
 		[Column("created_by")]
-		[ForeignKey("Creator")]
-		public Guid CreatedBy { get; set; }
+		public Guid CreatorId { get; set; }
 
 		[Column("created_at")]
 		public DateTime CreatedAt { get; set; }
 
 		[Column("updated_at")]
-		public DateTime UpdatedAt { get; set; }
+		public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
 
 		[Column("deleted")]
-		public bool IsDeleted { get; set; }
+		public bool IsDeleted { get; set; } = false;
 
 		// Navigation Properties
+		
+		[ForeignKey(nameof(CreatorId))]
 		public User Creator { get; set; }
 		public ICollection<AssignmentClass> AssignmentClasses { get; set; }
-		public ICollection<AssignmentGroup> AssignmentGroups { get; set; }
+		public AssignmentStruct ExamStruct { get; set; }
 		public ICollection<AssignmentAttachment> AssignmentAttachments { get; set; }
 		public ICollection<Submission> Submissions { get; set; }
 
@@ -58,7 +62,6 @@ namespace Entities.Contracts
 			Id = Guid.NewGuid();
 
 			Submissions = new HashSet<Submission>();
-			AssignmentGroups = new HashSet<AssignmentGroup>();
 			AssignmentClasses = new HashSet<AssignmentClass>();
 			AssignmentAttachments = new HashSet<AssignmentAttachment>();
 		}

Entities/Contracts/AssignmentQuestion.cs

@@ -6,6 +6,7 @@ using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using Entities.DTO;
 
 namespace Entities.Contracts
 {
@@ -17,41 +18,43 @@ namespace Entities.Contracts
 		public Guid Id { get; set; }
 
 		[Column("question_id")]
-		public Guid? QuestionId { get; set; } // 设为可空
-
-		// 当 IsGroup 为 true 时，此为 QuestionGroup 的外键
-		[Column("question_group_id")] // 新增一个外键列
-		public Guid? QuestionGroupId { get; set; } // 设为可空
+		public Guid QuestionId { get; set; } 
 
 		[Required]
 		[Column("group_id")]
 		[ForeignKey("AssignmentGroup")]
-		public Guid AssignmentGroupId { get; set; }
-
+		public Guid AssignmentStructId { get; set; }
 
 		[Required]
 		[Column("question_number")]
-		public byte QuestionNumber { get; set; }
+		public byte Index { get; set; }
 
 
+		[Column("parent_question_group_id")]
+		public Guid? ParentAssignmentQuestionId { get; set; }
+
+		[Column("group_state")]
+		public QuestionGroupState GroupState { get; set; } = QuestionGroupState.Standalone;
+
 		[Column("created_at")]
 		public DateTime CreatedAt { get; set; }
 
 		[Column("score")]
 		public float? Score { get; set; }
 
-		[Required]
-		[Column("bgroup")]
-		public bool IsGroup { get; set; }
 
 		[Column("deleted")]
 		public bool IsDeleted { get; set; }
 
 
 		public Question Question { get; set; }
-		public QuestionGroup QuestionGroup { get; set; }	
+		public AssignmentStruct AssignmentStruct { get; set; }
 		public ICollection<SubmissionDetail> SubmissionDetails { get; set; }
-		public AssignmentGroup AssignmentGroup { get; set; }
+
+		[ForeignKey(nameof(ParentAssignmentQuestionId))]
+		public AssignmentQuestion? ParentAssignmentQuestion { get; set; }
+		public ICollection<AssignmentQuestion> ChildrenAssignmentQuestion { get; set; } = new List<AssignmentQuestion>();
+
 
 		public AssignmentQuestion()
 		{

Entities/Contracts/AssignmentStruct.cs

@@ -5,11 +5,12 @@ using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Runtime.InteropServices;
 
 namespace Entities.Contracts
 {
 	[Table("assignment_group")]
-	public class AssignmentGroup
+	public class AssignmentStruct
 	{
 		[Key]
 		[Column("id")]
@@ -26,35 +27,34 @@ namespace Entities.Contracts
 
 		[Column("descript")]
 		[MaxLength(65535)] 
-		public string Descript { get; set; }
+		public string Description { get; set; }
 
+		[Column("layout")]
+		public Layout Layout { get; set; }	
 
 		[Column("total_points")]
-		public float? TotalPoints { get; set; }
+		public float? Score { get; set; }
 
-		[Column("number")]
-		public byte Number { get; set; }
+		[Column("index")]
+		public byte Index { get; set; }
 
 		[Column("parent_group")]
-		public Guid? ParentGroup { get; set; }
+		public Guid? ParentStructId { get; set; }
 
 		[Column("deleted")]
-		public bool IsDeleted { get; set; }
-
-		[Column("valid_question_group")]
-		public bool ValidQuestionGroup { get; set; }
+		public bool IsDeleted { get; set; } = false;
 
 		// Navigation Properties
 		public Assignment? Assignment { get; set; }
-		public AssignmentGroup? ParentAssignmentGroup { get; set;}
-		public ICollection<AssignmentGroup> ChildAssignmentGroups { get; set; }
+		public AssignmentStruct? ParentStruct { get; set;}
+		public ICollection<AssignmentStruct> ChildrenGroups { get; set; }
 		public ICollection<AssignmentQuestion> AssignmentQuestions { get; set; }
 
 
-		public AssignmentGroup()
+		public AssignmentStruct()
 		{
 			Id = Guid.NewGuid();
-			ChildAssignmentGroups = new HashSet<AssignmentGroup>();
+			ChildrenGroups = new HashSet<AssignmentStruct>();
 			AssignmentQuestions = new HashSet<AssignmentQuestion>();
 		}
 	}

Entities/Contracts/ClassTeacher.cs

@@ -22,6 +22,6 @@ namespace Entities.Contracts
 		public User Teacher { get; set; }
 
 		[Column("subject_taught")]
-		public string SubjectTaught { get; set; }
+		public SubjectAreaEnum SubjectTaught { get; set; }
 	}
 }

Entities/Contracts/Question.cs

@@ -16,36 +16,43 @@ namespace Entities.Contracts
 		public Guid Id { get; set; }
 
 		[Required]
-		[Column("question_text")]
+		[Column("title")]
 		[MaxLength(65535)]
-		public string QuestionText { get; set; }
+		public string Title { get; set; }
+
+		[Column("answer")]
+		[MaxLength(65535)]
+		public string? Answer { get; set; }
+
+		[Column("description")]
+		public Guid? DescriptionId { get; set; }
 
 		[Required]
-		[Column("question_type")]
+		[Column("type")]
 		[MaxLength(20)]
-		public QuestionType QuestionType { get; set; } 
-
-		[Column("correct_answer")]
-		[MaxLength(65535)]
-		public string CorrectAnswer { get; set; }
-
-		[Column("question_group_id")]
-		public Guid? QuestionGroupId { get; set; }
+		public QuestionType Type { get; set; } = QuestionType.Unknown;
 
 		[Column("difficulty_level")]
 		[MaxLength(10)] 
-		public DifficultyLevel DifficultyLevel { get; set; } 
+		public DifficultyLevel DifficultyLevel { get; set; } = DifficultyLevel.easy;
 
 		[Column("subject_area")]
-		public SubjectAreaEnum SubjectArea { get; set; }
+		public SubjectAreaEnum SubjectArea { get; set; } = SubjectAreaEnum.Unknown;
+
 
 		[Column("options")]
 		public string? Options { get; set; }
 
+		[Column("key_point")]
+		public Guid? KeyPointId { get; set; }
+
+		[Column("lesson")]
+		public Guid? LessonId { get; set; }
+
+
 		[Required]
 		[Column("created_by")]
-		[ForeignKey("Creator")]
-		public Guid CreatedBy { get; set; }
+		public Guid CreatorId { get; set; }
 
 		[Column("created_at")]
 		public DateTime CreatedAt { get; set; }
@@ -56,54 +63,30 @@ namespace Entities.Contracts
 		[Column("deleted")]
 		public bool IsDeleted { get; set; }
 
-		[Column("valid_question")]
-		public bool ValidQuestion { get; set; }
 
 		// Navigation Properties
+		[ForeignKey(nameof(CreatorId))]
 		public User Creator { get; set; }
-		public QuestionGroup QuestionGroup { get; set; }
-		public ICollection<AssignmentQuestion> AssignmentQuestions { get; set; }
+
+		[ForeignKey(nameof(DescriptionId))]
+		public QuestionContext Description { get; set; }
+		public Question? ParentQuestion { get; set; }
+		public ICollection<Question>? ChildrenQuestion { get; set; }
+
+		[ForeignKey(nameof(KeyPointId))]
+		public KeyPoint? KeyPoint { get; set; }
+		[ForeignKey(nameof(LessonId))]	
+		public Lesson? Lesson { get; set; }
+		
+		public ICollection<AssignmentQuestion>? AssignmentQuestions { get; set; }
 
 		public Question()
 		{
 			Id = Guid.NewGuid();
 			AssignmentQuestions = new HashSet<AssignmentQuestion>();
+			ChildrenQuestion = new HashSet<Question>();	
 		}
 	}
 
-	public enum DifficultyLevel
-	{
-		easy,
-		medium,
-		hard
-	}
 
-	public enum QuestionType
-	{
-		Unknown, // 可以有一个未知类型或作为默认
-		Spelling,           // 拼写
-		Pronunciation,      // 给带点字选择正确读音
-		WordFormation,      // 组词
-		FillInTheBlanks,    // 选词填空 / 补充词语
-		SentenceDictation,  // 默写句子
-		SentenceRewriting,  // 仿句 / 改写句子
-		ReadingComprehension, // 阅读理解
-		Composition         // 作文
-							// ... 添加您其他题目类型
-	}
-
-	public enum SubjectAreaEnum // 建议命名为 SubjectAreaEnum 以避免与属性名冲突
-	{
-		Unknown,         // 未知或默认
-		Mathematics,     // 数学
-		Physics,         // 物理
-		Chemistry,       // 化学
-		Biology,         // 生物
-		History,         // 历史
-		Geography,       // 地理
-		Literature,      // 语文/文学
-		English,         // 英语
-		ComputerScience, // 计算机科学
-						 // ... 你可以根据需要添加更多科目
-	}
 }

Entities/Contracts/QuestionContext.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.Contracts
+{
+	public class QuestionContext
+	{
+		public Guid Id { get; set; }
+
+		public string Description { get; set; } = string.Empty;
+
+		[InverseProperty(nameof(Question.Description))]	
+		public ICollection<Question> Questions { get; set; } = new List<Question>();
+
+
+		public QuestionContext()
+		{
+			Questions = new HashSet<Question>();
+		}
+	}
+}

Entities/Contracts/QuestionGroup.cs

@@ -1,79 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel.DataAnnotations.Schema;
-using System.ComponentModel.DataAnnotations;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Entities.Contracts
-{
-	[Table("question_groups")]
-	public class QuestionGroup
-	{
-		[Key]
-		[Column("id")]
-		public Guid Id { get; set; }
-
-		[Column("title")]
-		[MaxLength(255)]
-		public string Title { get; set; }
-
-		[Required]
-		[Column("description")]
-		[MaxLength(65535)]
-		public string Description { get; set; }
-
-		[Column("type")]
-		[MaxLength(50)]
-		public string Type { get; set; }
-
-		[Column("difficulty_level")]
-		[MaxLength(10)]
-		public DifficultyLevel DifficultyLevel { get; set; }
-
-		[Column("subject_area")]
-		public SubjectAreaEnum SubjectArea { get; set; }
-
-		[Column("total_questions")]
-		public int TotalQuestions { get; set; } = 0;
-
-		[Column("parent_question_group")]
-		public Guid? ParentQG { get; set; }
-
-		[Required]
-		[Column("created_by")]
-		[ForeignKey("Creator")]
-		public Guid CreatedBy { get; set; }
-
-		[Column("created_at")]
-		public DateTime CreatedAt { get; set; }
-
-		[Column("updated_at")]
-		public DateTime UpdatedAt { get; set; }
-
-		[Column("deleted")]
-		public bool IsDeleted { get; set; }
-
-		[Column("valid_group")]
-		public bool ValidGroup { get; set; }
-
-
-
-		public User Creator { get; set; }
-		public QuestionGroup ParentQuestionGroup { get; set; }
-		public ICollection<QuestionGroup> ChildQuestionGroups { get; set; }
-		public ICollection<AssignmentQuestion> AssignmentQuestions { get; set; }
-		public ICollection<Question> Questions { get; set; }
-
-		public QuestionGroup()
-		{
-			Id = Guid.NewGuid();
-			Questions = new HashSet<Question>();
-			CreatedAt = DateTime.UtcNow;
-			UpdatedAt = DateTime.UtcNow;
-			IsDeleted = false;
-			ValidGroup = true;
-		}
-	}
-}

Entities/Contracts/Submission.cs

@@ -41,7 +41,7 @@ namespace Entities.Contracts
 
 		[Column("graded_by")]
 		[ForeignKey("Grader")]
-		public Guid? GradedBy { get; set; }
+		public Guid? GraderId { get; set; }
 
 		[Column("graded_at")]
 		public DateTime? GradedAt { get; set; }
@@ -74,6 +74,5 @@ namespace Entities.Contracts
 		Resubmission,   // 待重新提交 (如果允许)
 		Late,           // 迟交
 		Draft,          // 草稿
-						// ... 添加你需要的其他状态
 	}
 }

Entities/Contracts/SubmissionDetail.cs

@@ -23,7 +23,6 @@ namespace Entities.Contracts
 
 		[Required]
 		[Column("student_id")]
-		[ForeignKey("User")]
 		public Guid StudentId { get; set; }
 
 		[Required]
@@ -52,8 +51,11 @@ namespace Entities.Contracts
 		[Column("deleted")]
 		public bool IsDeleted { get; set; }
 
+		[ForeignKey(nameof(StudentId))]
+		public User Student { get; set; }
+
 		public Submission Submission { get; set; }
-		public User User { get; set; }
+
 		public AssignmentQuestion AssignmentQuestion { get; set; }
 
 		public SubmissionDetail()

Entities/Contracts/Textbook/KeyPoint.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.Contracts
+{
+	[Table("key_point")]
+	public class KeyPoint
+	{
+		[Key]
+		public Guid Id { get; set; }
+
+		[StringLength(255)]
+		public string Key { get; set; } = string.Empty;
+
+		
+		[Required]
+		public Guid LessonID { get; set; }
+
+		[ForeignKey(nameof(LessonID))]
+		public Lesson Lesson { get; set; }
+
+
+		public ICollection<Question> Questions { get; set; }
+
+		public KeyPoint()
+		{
+			Id = Guid.NewGuid();
+			Questions = new HashSet<Question>();
+		}
+	}
+}

Entities/Contracts/Textbook/Lesson.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.Contracts
+{
+	[Table("lesson")]
+	public class Lesson
+	{
+		[Key]
+		public Guid Id { get; set; }
+
+		[StringLength(255)]
+		public string Title { get; set; } = string.Empty;
+
+		public string Description { get; set; } = string.Empty;
+
+		[Required]
+		public Guid TextbookID { get; set; }
+
+
+		[ForeignKey(nameof(TextbookID))]
+		public Textbook Textbook { get; set; }
+
+		[InverseProperty(nameof(KeyPoint.Lesson))]
+		public ICollection<KeyPoint>? KeyPoints { get; set; }
+
+		[InverseProperty(nameof(Question.Lesson))]
+		public ICollection<Question>? Questions { get; set; }
+
+		[InverseProperty(nameof(LessonQuestion.Lesson))]
+		public ICollection<LessonQuestion>? LessonQuestions { get; set; } 
+
+
+
+		public Lesson()
+		{
+			Id = Guid.NewGuid();
+			KeyPoints = new HashSet<KeyPoint>();
+			Questions = new HashSet<Question>();	
+			LessonQuestions = new HashSet<LessonQuestion>();	
+		}
+	}
+}

Entities/Contracts/Textbook/LessonQuestion.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.Contracts
+{
+	[Table("lesson_question")]
+	public class LessonQuestion
+	{
+		[Key]
+		public Guid Id { get; set; }
+
+		[MaxLength(65535)]
+		public string Question { get; set; }
+
+		[Required]
+		public Guid LessonID { get; set; }
+
+		[ForeignKey(nameof(LessonID))]	
+		public Lesson Lesson { get; set; }
+
+		public LessonQuestion()
+		{
+			Id = Guid.NewGuid();
+		}
+
+	}
+}

Entities/Contracts/Textbook/Textbook.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.Contracts
+{
+	[Table("textbook")]
+	public class Textbook
+	{
+		[Key]
+		public Guid Id { get; set; }
+
+		public Grade Grade { get; set; } = Grade.Unknown;
+
+		public string Title { get; set; } = string.Empty;
+
+		public Publisher Publisher { get; set; } = Publisher.部编版;
+
+		public SubjectAreaEnum SubjectArea { get; set; } = SubjectAreaEnum.Unknown;
+
+		[InverseProperty(nameof(Lesson.Textbook))]
+		public ICollection<Lesson> Lessons { get; set; }
+
+		public Textbook()
+		{
+			Id = Guid.NewGuid();
+			Lessons = new HashSet<Lesson>();
+		}
+	}
+
+}

Entities/DTO/AssignmentDto.cs

@@ -0,0 +1,9 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.DTO
+{
+}

Entities/DTO/AssignmentQuestionDto.cs

@@ -0,0 +1,25 @@
+using Entities.Contracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.DTO
+{
+	public class AssignmentQuestionDto
+	{
+		public float Score { get; set; } = 0;
+		public byte Index { get; set; } = 0;
+		public QuestionGroupState GroupState { get; set; } = QuestionGroupState.Standalone;
+
+
+
+		public AssignmentQuestionDto? ParentAssignmentQuestion { get; set; }
+		public ICollection<AssignmentQuestionDto> ChildrenAssignmentQuestion { get; set; } = new List<AssignmentQuestionDto>();
+
+
+
+		public QuestionDto Question { get; set; }
+	}
+}

Entities/DTO/ExamDto.cs

@@ -1,4 +1,5 @@
-using System;
+using Entities.Contracts;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -7,36 +8,88 @@ using System.Xml.Serialization;
 
 namespace Entities.DTO
 {
+
+	public class AssignmentStructDto
+	{
+		public Guid Id { get; set; } = Guid.Empty;
+		public string Title { get; set; } = string.Empty;
+		public string Description { get; set; } = string.Empty;
+		public float Score { get; set; } = 0;
+		public byte Index { get; set; } = 0;
+		public Layout Layout { get; set; } = Layout.horizontal;
+
+
+
+
+		public ICollection<AssignmentQuestionDto> AssignmentQuestions { get; set; } = new List<AssignmentQuestionDto>();
+
+		public AssignmentStructDto? ParentStruct { get; set; }
+		public ICollection<AssignmentStructDto> ChildrenGroups { get; set; } = new List<AssignmentStructDto>();
+	}
+
+	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 AssignmentStructDto ExamStruct { get; set; } = new AssignmentStructDto();
+	}
+
+	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 ExamDto
 	{
 		public Guid? AssignmentId { get; set; }
-		public string CreaterEmail { get; set; }	
+		public string CreaterEmail { get; set; }
 		public string AssignmentTitle { get; set; } = string.Empty;
 		public string Description { get; set; }
 		public string SubjectArea { get; set; }
-		public QuestionGroupDto QuestionGroups { get; set; } = new QuestionGroupDto();
+		public QuestionGroupDto ExamStruct { get; set; } = new QuestionGroupDto();
 	}
 
 	public class QuestionGroupDto
 	{
-		public byte Index { get; set; } 
+		public byte Index { get; set; }
 
 		public string? Title { get; set; }
 
 		public float Score { get; set; }
 
-		public string? Descript { get; set; } 
+		public string? Descript { get; set; }
 		public List<SubQuestionDto> SubQuestions { get; set; } = new List<SubQuestionDto>();
 		public List<QuestionGroupDto> SubQuestionGroups { get; set; } = new List<QuestionGroupDto>();
 
-		// 标记是否是一个具有上下文的单独问题
 		public bool ValidQuestionGroup { get; set; } = false;
 	}
 
 	public class SubQuestionDto
 	{
 
-		public byte Index { get; set; } 
+		public byte Index { get; set; }
 
 		public string? Stem { get; set; }
 
@@ -44,12 +97,11 @@ namespace Entities.DTO
 
 		public List<OptionDto> Options { get; set; } = new List<OptionDto>();
 
-		public string? SampleAnswer { get; set; } 
+		public string? SampleAnswer { get; set; }
 
-		public string? QuestionType { get; set; } 
+		public string? QuestionType { get; set; }
 		public string? DifficultyLevel { get; set; }
 
-		// 标记是否是一个独立的问题
 		public bool ValidQuestion { get; set; } = false;
 
 	}
@@ -64,13 +116,13 @@ namespace Entities.DTO
 	{
 		public static void Convert(this ExamDto examDto)
 		{
-			var qg = examDto.QuestionGroups;
+			var qg = examDto.ExamStruct;
 
 		}
 
 		public static void Convert(this QuestionGroupDto examDto)
 		{
-			if(examDto.ValidQuestionGroup)
+			if (examDto.ValidQuestionGroup)
 			{
 
 			}

Entities/DTO/QuestionDto.cs

@@ -0,0 +1,41 @@
+using Entities.Contracts;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.DTO
+{
+	public class QuestionDto
+	{
+		public Guid Id { get; set; } = Guid.Empty;
+
+		public string Title { get; set; } = string.Empty;
+
+		public QuestionContextDto? Description { get; set; }	
+
+		public QuestionType Type { get; set; } = QuestionType.Unknown;
+
+		public string? Answer { get; set; } = string.Empty;
+
+		public string? Options { get; set; }
+
+		public DifficultyLevel DifficultyLevel { get; set; } = DifficultyLevel.easy;
+
+		public SubjectAreaEnum SubjectArea { get; set; } = SubjectAreaEnum.Unknown;
+
+		public Guid CreatorId { get; set; }
+
+		public Guid? KeyPointId { get; set; }
+
+		public Guid? LessonId { get; set; }
+
+		public DateTime CreatedAt { get; set; }
+
+		public DateTime UpdatedAt { get; set; } = DateTime.Now;
+
+	}
+}