private void comboBoxBookTitle_SelectedValueChanged(object sender, EventArgs e)
        {
            textBoxSearchBook.Text = "";

            SachDao dao = new SachDao();
            var     res = dao.bindDataFromTextBoxSearchToOthers(comboBoxBookTitle.Text);

            foreach (var item in res)
            {
                textBoxAuthor.Text    = item.HoTenTG;
                textBoxPublisher.Text = item.TenNXB;
                textBoxStock.Text     = item.SoLuongTon.ToString();
                textBoxPrice.Text     = item.GiaBan.ToString();
            }
        }
        private void comboBoxBookTitleuq_SelectedValueChanged(object sender, EventArgs e)
        {
            string booktitle = "";

            textBoxSearchBookuq.Text = "";

            SachDao dao = new SachDao();
            var     res = dao.bindDataFromTextBoxSearchToOthers(comboBoxBookTitleuq.Text);

            foreach (var item in res)
            {
                textBoxAuthoruq.Text    = item.HoTenTG;
                textBoxPublisheruq.Text = item.TenNXB;
                textBoxStockuq.Text     = item.SoLuongTon.ToString();
                textBoxPriceuq.Text     = item.GiaBan.ToString();
                booktitle        = comboBoxBookTitleuq.Text;
                textBoxIDuq.Text = dao.getIdBookByName(booktitle).ToString();
            }
        }