private void TyLEBT()
{
MTCSYT.SYS_Session session = (MTCSYT.SYS_Session)Session["SYS_Session"];
string madvi = session.User.ma_dviqlyDN;
var kh = db.SELECT_TTTT_PT_BT_KHANG(madvi, 0);
int t = kh.Rows.Count;
if (t != 0)
{
string tlbt = kh.Rows[0]["PT_BT"] + "";
txtTyLeBT.Text = tlbt;
}
else
{
txtTyLeBT.Text = "30";
}
}