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