private void BtSua_Click(object sender, EventArgs e)
        {
            var quaTrinhHocTap = bdsQuaTrinhHocTap.Current as QuaTrinhHocTap;

            if (quaTrinhHocTap != null)
            {
                var f = new frmQuaTrinhHocTap(quaTrinhHocTap);
                f.ShowDialog();
            }
        }
        private void BtThem_Click(object sender, EventArgs e)
        {
            var f = new frmQuaTrinhHocTap();

            f.ShowDialog();
        }