public void HienThiDS_MaNganhHang()
{
DataTable dt_maloai = hh.LayDS_MaNganhHang();
cb_MaLoai.DataSource = dt_maloai;
cb_MaLoai.DisplayMember = "TenDanhMuc";
cb_MaLoai.ValueMember = "MaDanhMuc";
if (cb_MaLoai.Items.Count > 0)
{
cb_MaLoai.SelectedIndex = 0;
}
}