public DataSet.DsPSMS.ST_TIMETABLE_HEDRow searchTimeHedBygradeclassid(int gradeId, int classId) { DataSet.DsPSMS.ST_TIMETABLE_HEDRow resultData = new DataSet.DsPSMS.ST_TIMETABLE_HEDDataTable().NewST_TIMETABLE_HEDRow(); try { timedb.Open(); resultData = timedb.selectTimeHedBygradeclass(gradeId, classId); if (resultData != null) { //msg = resultData.Rows.Count + " user found"; } else { resultData = null; //msg = "user not found"; } } catch { // msg = "error has occure when insert data"; return(null); } finally { timedb.Close(); } return(resultData); }