?using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class CheckOut : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {

            BookStore checkoutDB = new BookStore();
            String cartId = checkoutDB.GetShoppingCartId();

            MyDataGrid.DataSource = checkoutDB.DisplayShoppingCart(cartId);
            MyDataGrid.DataBind();

            TotalLbl.Text = String.Format("{0:c}", checkoutDB.ShoppingCartTotalCost(cartId));
        }
    }
    protected void SubmitBtn_Click(object sender, EventArgs e)
    {
        BookStore checkoutDB = new BookStore();

        // 獲取最終用戶的購物車ID
        String cartId = checkoutDB.GetShoppingCartId();

        // 獲取最終用戶的UserID
        String customerId = User.Identity.Name;

        if ((cartId != null) && (customerId != null))
        {

            // 下訂單
            int orderId = checkoutDB.PlaceOrder(customerId, cartId);

            Header.Text = "結算完成";
            OrderMsgLabel.Text = "<b>您的訂單編號是： </b>" + orderId;
            SubmitBtn.Visible = false;
        }
    }
}