private void button1_Click(object sender, EventArgs e) { DieuXe._ktDieuXe(DieuXe.Madon.ToString(), txtthoigiancho.Text, txtthoigiandi.Text, txtquadem.Text); DonHang._updateTrangThai(DieuXe.Madon.ToString(), txtquangduong.Text); MessageBox.Show("Hoàn thành!!"); DieuXe._thanhtien(DieuXe.Madon.ToString()); this.Close(); }