private void btnThemLoaiQuangCao_Click(object sender, EventArgs e)
        {
            FormLoaiQuangCao diaglogLoaiQuangCao = new FormLoaiQuangCao();

            diaglogLoaiQuangCao.StartPosition = FormStartPosition.CenterScreen;
            if (diaglogLoaiQuangCao.ShowDialog(this) == DialogResult.Yes)
            {
            }
            else
            {
                cbLoaiQuangCao.DataSource = loaiQuangCaoBLL.LayDanhSachLoaiQuangCao();
            }
        }