#region 將答案和分數更新到資料庫中  李少然 2015年12月26日10:09:07
        /// <summary>
        /// 將答案和分數更新到資料庫中
        /// </summary>
        /// <param name="list">StudentID,QuestionID,ExamAnswer,TimeStamp,fration</param>
        /// <param name="studentrecord">只需要一個studentID，為了查出學院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;
 
            //根據學號，和時間戳選出這一段的內容，然後再根據QuestionID給每一個flag更新分數。
            #region 更新分數的拼接sql語句
            for (int i = 0; i < list.Count; i++)
            {
                questionID = list[i].QuestionID.ToString();
                //將分數傳給變數
                Fation = list[i].Fration;
                //判分sql，拼接sql，用case，when語句
                sbSql.Append(" WHEN '" + questionID + "' THEN '" + Fation + "'");
            }
            sbSql.Append("end,"); //加“，”
            #endregion
 
            #region 拼接考生答案更新到資料庫中
            //拼接更新考生答案sql
            sbSql.Append("  ExamAnswer = CASE QuestionID");
            for (int i = 0; i < list.Count; i++)
            {
                string examAnswer = list[i].ExamAnswer.ToString();
                questionID = list[i].QuestionID.ToString();
                //學生答案資訊更新，when後邊的是QuerstionID,
                sbSql.Append(" WHEN '" + questionID + "' THEN '" + list[i].ExamAnswer + "'");
            }
            sbSql.Append(" end");   //不加逗號“，”
            #endregion
 
 
           studentIDs += "'" + list[0].StudentID.ToString() + "'";
           tamstamp += "'" + list[0].TimeStamp.ToString() + "'";
          //去除語句最後的逗號或者括號
            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