private bool check_loai_pc_dang_su_dung(decimal ip_id_loai_pc)
{
US_GD_NHAN_VIEN_PHU_CAP v_us = new US_GD_NHAN_VIEN_PHU_CAP();
DS_GD_NHAN_VIEN_PHU_CAP v_ds = new DS_GD_NHAN_VIEN_PHU_CAP();
v_us.FillDataset(v_ds, "where id_phu_cap =" + ip_id_loai_pc);
if (v_ds.Tables[0].Rows.Count == 0)
return false;
return true;
}