private decimal find_id_tu_dien_by_ma_tu_dien(string ma_tu_dien)
{
try
{
US_CM_DM_TU_DIEN v_us = new US_CM_DM_TU_DIEN();
DS_CM_DM_TU_DIEN v_ds = new DS_CM_DM_TU_DIEN();
v_us.FillDataset(v_ds);
decimal id = (from DataRow dr in v_ds.Tables[0].Rows
where (string)dr["MA_TU_DIEN"] == ma_tu_dien
select (decimal)dr["ID"]).FirstOrDefault();
return id;
}
catch(Exception v_e)
{
throw v_e;
}
}