private void btn_Submit_Click(object sender, EventArgs e)
{
// code xu ly sua thong tin
ncc.ID_Supplier = int.Parse(textBoxMaNCC.Text);
ncc.Name = textBoxTenNCC.Text;
ncc.Address = textBoxDiaChi.Text;
ncc.Phone = textBoxSDT.Text;
ncc.Email = textBoxEmail.Text;
ctr.Update(ncc);
// dong formz
Close();
}