private void cbLoaiPhong_SelectedIndexChanged(object sender, EventArgs e) { string maloaiphong = cbLoaiPhong.SelectedItem.ToString(); LoaiPhong p = lpBus.ThongTinLoaiPhong(maloaiphong); txtSoNguoi.Text = p.Songuoi + ""; txtGiaPhong.Text = p.Giaphong + ""; txtTenLoai.Text = p.Tenloaiphong + ""; }