private void cbMaThe_SelectedValueChanged(object sender, EventArgs e)
        {
            DataTable dt = Sql_ThuTienPhat.TimHoTen_TienNo(cbMaThe.SelectedValue.ToString());

            if (dt.Rows.Count > 0)
            {
                string hoten  = dt.Rows[0][1].ToString();
                int    tongno = int.Parse(dt.Rows[0][7].ToString());

                txtHoTen.Text  = hoten;
                txtTongNo.Text = tongno.ToString();
            }
        }
 public static void ThuTienPhat(En_ThuTienPhat s)
 {
     Sql_ThuTienPhat.ThuTienPhat(s);
 }