shoppingcart.aspx.cs

网上书店

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

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

    //显示图书
    private void PopulateControls()
    {

        Title = DatabaseConfiguration.SiteName + ":购物车";

        DataTable dt = ShoppingCartAccess.GetShoppingCartItems();

        if (dt.Rows.Count == 0)
        {
            lblTitle.Text = "你的购物车是空的!";
            gridShoppingCart.Visible = false;
            btnUpdateQuantity.Enabled = false;
            btnProcessToCheck.Enabled = false;
            lblAmount.Text = String.Format("{0:c}", 0);
        }
        else
        {

            gridShoppingCart.DataSource = dt;
            gridShoppingCart.DataBind();

            lblTitle.Text = "你所选择的商品如下:";
            gridShoppingCart.Visible = true;
            btnUpdateQuantity.Enabled = true;
            btnProcessToCheck.Enabled = true;

            decimal amount = ShoppingCartAccess.GetTotalAmount();
            lblAmount.Text = String.Format("{0:c}", amount);
        }
    }
    protected void ridShoppingCart_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        int rowIndex = e.RowIndex;
        string BookId = gridShoppingCart.DataKeys[rowIndex].Value.ToString();
        ShoppingCartAccess.RemoveItem(BookId);
        PopulateControls();
    }
    protected void btnUpdateQuantity_Click(object sender, EventArgs e)
    {
        int quantity;
        string bookID;
        for (int i = 0; i < gridShoppingCart.Rows.Count; i++)
        {
            GridViewRow gr = gridShoppingCart.Rows[i];
            bookID = gridShoppingCart.DataKeys[i].Value.ToString();
            TextBox tb = (TextBox)gr.FindControl("txtQuantity");
            if (Int32.TryParse(tb.Text, out quantity))
            {
                ShoppingCartAccess.UpdateItem(bookID, quantity);
            }
        }
        PopulateControls();
    }
    protected void btnProcessToCheck_Click(object sender, EventArgs e)
    {
        if (Session["Customer"] == null)
        {
            Response.Write("<script language='javascript' type='text/javascript'>alert('你还没有登陆，请先登陆');window.location.href='Default.aspx';</script>");
        }
        else
        {
            Session["OrderID"] = ShoppingCartAccess.CreateCustomerOrder(Session["Customer"].ToString());
            Response.Redirect("OrderProcess.aspx");
        }
    }
    protected void btnContinue_Click(object sender, EventArgs e)
    {
        Response.Redirect(Request.ApplicationPath);
    }
}