public DataTable GetClassNameByNumber(string getGradeNumber,string getClassNumber) { using ( OptionDataAccess optionDataAccess = new OptionDataAccess() ) { try { return optionDataAccess.GetClassNameByNumber(getGradeNumber,getClassNumber); } catch(Exception e) { Util.WriteLog(e.Message,Util.EXCEPTION_LOG_TITLE); return null; } } }