public string CheckIsGradeExists(string getGrade,ref bool isOk) { using ( OptionDataAccess optionDataAccess = new OptionDataAccess() ) { try { int gradeNumber = Convert.ToInt32(getGrade.Replace(" ","")); DataTable dtGrade = optionDataAccess.IsExistGrade(gradeNumber); if ( dtGrade.Rows.Count > 0 ) { isOk = true; return "ok"; } else { isOk = false; return "年级不存在请重试!"; } } catch(Exception e) { isOk = false; Util.WriteLog(e.Message,Util.EXCEPTION_LOG_TITLE); return "年级号码应该为数字!"; } } }