#region 将答案和分数更新到数据库中  李少然 2015年12月26日10:09:07/// <summary>/// 将答案和分数更新到数据库中/// </summary>/// <param name="list">StudentID,QuestionID,ExamAnswer,TimeStamp,fration</param>/// <param name="studentrecord">只需要一个studentID，为了查出学院ID</param>public void ReturnScore(List<WordQuestionRecordEntity> list, WordQuestionRecordEntity studentrecord){String which = WhichWordRecored(studentrecord);StringBuilder sbSql = new StringBuilder();sbSql.Append("update WordQuestionRecordEntity_" + which + " SET Fration = CASE QuestionID ");string Fation = string.Empty;string questionID = string.Empty;string studentIDs = string.Empty;string tamstamp = string.Empty;//根据学号，和时间戳选出这一段的内容，然后再根据QuestionID给每一个flag更新分数。#region 更新分数的拼接sql语句for (int i = 0; i < list.Count; i++){questionID = list[i].QuestionID.ToString();//将分数传给变量Fation = list[i].Fration;//判分sql，拼接sql，用case，when语句sbSql.Append(" WHEN '" + questionID + "' THEN '" + Fation + "'");}sbSql.Append("end,"); //加“，”#endregion#region 拼接考生答案更新到数据库中//拼接更新考生答案sqlsbSql.Append("  ExamAnswer = CASE QuestionID");for (int i = 0; i < list.Count; i++){string examAnswer = list[i].ExamAnswer.ToString();questionID = list[i].QuestionID.ToString();//学生答案信息更新，when后边的是QuerstionID,sbSql.Append(" WHEN '" + questionID + "' THEN '" + list[i].ExamAnswer + "'");}sbSql.Append(" end");   //不加逗号“，”#endregionstudentIDs += "'" + list[0].StudentID.ToString() + "'";tamstamp += "'" + list[0].TimeStamp.ToString() + "'";//去除语句最后的逗号或者括号studentIDs.Remove(studentIDs.Length - 1, 1);sbSql.Append(" where StudentID in (" + studentIDs + ") and TimeStamp in (" + tamstamp + ")");DataTable dt = sqlhelper.ExecuteQuery(sbSql.ToString(), CommandType.Text);}#endregion