1

Entities/DTO/ExamDto.cs

@@ -28,6 +28,8 @@ namespace Entities.DTO
 		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;
 	}
 
@@ -46,12 +48,34 @@ namespace Entities.DTO
 
 		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;
 
 	}
 
 	public class OptionDto
 	{
-		public string Value { get; set; }
+		public string? Value { get; set; } = string.Empty;
 	}
+
+
+	public static class ExamDtoExtension
+	{
+		public static void Convert(this ExamDto examDto)
+		{
+			var qg = examDto.QuestionGroups;
+
+		}
+
+		public static void Convert(this QuestionGroupDto examDto)
+		{
+			if(examDto.ValidQuestionGroup)
+			{
+
+			}
+
+		}
+	}
+
 }