public DataSet.DsPSMS.ST_TIMETABLE_HEDDataTable isExistTimeHed(DataSet.DsPSMS.ST_TIMETABLE_HEDRow dr) { if (dr == null) { return(null); } try { timedb.Open(); DataSet.DsPSMS.ST_TIMETABLE_HEDDataTable dt = timedb.isExitTimeHedData(dr); if (dt != null && (dt.Rows.Count > 0)) { return(dt); } else { return(null); } } catch { return(null); } finally { timedb.Close(); } }