private void cbMaLop_DSLH_SelectedIndexChanged(object sender, EventArgs e)
{
//foreach (Lop lop in listLop)
// if (lop.MaLop == cbMaLop_DSLH.Text)
// {
// tbTenLop_DSLH.Text = lop.TenLop;
// tbSiSo_DSLH.Text = lop.SiSo.ToString();
// break;
// }
Lop lop = lopBLL.GetLop(cbLop_DSLH.Text, cbNH_HSLH.Text);
tbMaLop_DSLH.Text = lop.MaLop;
tbSiSo_DSLH.Text = lop.SiSo.ToString();
LoadDSHSTheoLop(tbMaLop_DSLH.Text, cbLop_DSLH.Text);
}
