/// <summary> /// 添加问题 /// </summary> /// <param name="description"></param> /// <returns></returns> public QuestionOption AddQuestionOption(string description) { var questionOption = QuestionOption.CreateNew(this, description); if (QuestionOptions == null) { QuestionOptions = new List <QuestionOption>(); } QuestionOptions.Add(questionOption); return(questionOption); }
/// <summary> /// 设置正确选项 /// </summary> /// <param name="questionOptionGuid"></param> public void SetCorrectOption(Guid questionOptionGuid) { if (QuestionOptions == null) { throw new Exception($"问题选项{questionOptionGuid}不存在!"); } var qOption = QuestionOptions.FirstOrDefault(p => p.QuestionOptionGuid.Equals(questionOptionGuid)); CorrectOption = qOption ?? throw new Exception($"问题选项{questionOptionGuid}不存在!"); CorrectOptionId = questionOptionGuid; }
/// <summary> /// 删除问题选项 /// </summary> /// <param name="questionOptionGuid"></param> public void RemoveQuestionOption(Guid questionOptionGuid) { if (QuestionOptions == null) { throw new Exception($"问题选项{questionOptionGuid}不存在!"); } var qOption = QuestionOptions.FirstOrDefault(p => p.QuestionOptionGuid.Equals(questionOptionGuid)); if (qOption == null) { throw new Exception($"问题选项{questionOptionGuid}不存在!"); } QuestionOptions.Remove(qOption); if (qOption.QuestionOptionGuid.Equals(CorrectOptionId)) { CorrectOptionId = default(Guid); CorrectOption = null; } }
/// <summary> /// 修改问题选项 /// </summary> /// <param name="questionOptionGuid"></param> /// <param name="description"></param> public void UpdateQuestionOption(Guid questionOptionGuid, string description) { if (QuestionOptions == null) { throw new Exception($"问题选项{questionOptionGuid}不存在!"); } var qOption = QuestionOptions.FirstOrDefault(p => p.QuestionOptionGuid.Equals(questionOptionGuid)); if (qOption == null) { throw new Exception($"问题选项{questionOptionGuid}不存在!"); } qOption.UpdateDescription(description); if (qOption.QuestionOptionGuid.Equals(CorrectOptionId)) { CorrectOption = qOption; } }