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

            if (quaTrinhHocTap != null)
            {
                formQuaTrinhHocTapChiTiet form = new formQuaTrinhHocTapChiTiet(quaTrinhHocTap);
                form.ShowDialog();
            }
        }
        private void btnThem_Click(object sender, EventArgs e)
        {
            formQuaTrinhHocTapChiTiet form = new formQuaTrinhHocTapChiTiet();

            form.ShowDialog();
        }