MyBookShop/BookShop/Store/details.aspx.cs

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using BLL;
using BookShop.Store.cart;
using Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace BookShopProject.Store
{
    public partial class details : System.Web.UI.Page
    {
        public static Books bookInfo { get; set; }
        BLLBooks bll = new BLLBooks();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                if (Request.QueryString["bookid"] != null)
                {
                    bookInfo = bll.GetEntity(int.Parse(Request.QueryString["bookid"].ToString()));
                    AddCarts();
                }
                else
                {
                    Response.Redirect("category.aspx", true);
                }
            }
        }
        /// <summary>
        /// 添加商品到购物车
        /// </summary>
        public void AddCarts()
        {
            if (Request.QueryString["num"] != null)
            {
                //if (Session["LoginInfo"] != null)
                //{
                    int num = int.Parse(Request.QueryString["num"].ToString());
                    Carts carts = new Carts();
                    carts.GoodsID = bookInfo.Id;
                    carts.GoodsImg = bookInfo.ISBN;
                    carts.GoodsName = bookInfo.Title;
                    carts.UnitPrice = bookInfo.UnitPrice;
                    carts.Count = num;
                    carts.totalPrice = num * bookInfo.UnitPrice;
                    List<Carts> list = new List<Carts>();
                    if (Session["Carts"] == null)
                    {
                        list.Add(carts);
                        Session["Carts"] = list;
                        Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "", "alert('添加到购物车成功！快到购物车查看吧！');", true);
                    }
                    else
                    {
                        list = (List<Carts>)Session["Carts"];
                        bool flag = true;
                        for (int i = 0; i < list.Count; i++)