利用对象序列化将购物车保存在Cookie中

购物车类:ShopCart.cs(说明:主要利用hashtable保存商品对象)

原始地址：  http://tech.it168.com/d/2008-05-08/200805080928738_1.shtml

using System;using System.Collections;/// <summary>/// 购物车类/// </summary>[Serializable]public class ShopCart{public Hashtable _CartItems = new Hashtable();/// <summary>/// 构造函数/// </summary>    public ShopCart(){///to do something    }/// <summary>/// 返回购物车中的所有商品(接口类型)/// </summary>    public ICollection CartItems{get { return _CartItems.Values; }}/// <summary>/// 购物中所有商品的价格合计/// </summary>    public double Total{get{double sum = 0;foreach (ShopCartItem item in _CartItems.Values){sum += ((item.Price * item.Quantity) + item.SendPrice);}return sum;}}/// <summary>/// 返回购物车里所有商品的数量/// </summary>    public double TotalNum{get{double sum = 0;foreach (ShopCartItem item in _CartItems.Values){sum += item.Quantity;}return sum;}}/// <summary>/// 向购物车里添加某商品/// </summary>/// <param name="ID">商品ID</param>/// <param name="Name">商品名称</param>/// <param name="Price">商品单价</param>/// <param name="AutoAddQuantity">如果购物车中已经存在该商品，该商品的数量是否加一，True数量加1，False数量不变</param>    public void AddItem(string ID, string Name, string DeliveryName, double Price, int Score, string ProductId, string PicUrl, double MarketPrice, double UserPrice, double VipPrice, double SendPrice,string ShopID, string UrlFrom, bool AutoAddQuantity){ShopCartItem item = (ShopCartItem)_CartItems[ID];if(item == null)_CartItems.Add(ID, new ShopCartItem(ID, Name, DeliveryName, Price, Score, ProductId, PicUrl, MarketPrice, UserPrice, VipPrice, SendPrice,ShopID, UrlFrom));else{if(AutoAddQuantity){item.Quantity++;}_CartItems[ID] = item;}}/// <summary>/// 从购物车里移除某商品/// </summary>/// <param name="ID">商品ID</param>/// <param name="FullDelete">如果商品数量大于１，是否彻底从购物车中删除该种商品，true彻底从购物车中删除该种商品，false则仅将该种商品数量减一</param>    public void RemoveItem(string ID, bool FullDelete){ShopCartItem item = (ShopCartItem)_CartItems[ID];if(item == null){return;}else{if(FullDelete){_CartItems.Remove(ID);}else{item.Quantity--;if(item.Quantity == 0){_CartItems.Remove(ID);}else{_CartItems[ID] = item;}}}}/// <summary>/// 修改购物车里某商品的数量/// </summary>/// <param name="ID">商品ID</param>/// <param name="Quantity">商品数量</param>    public void UpdateItem(string ID, int Quantity){ShopCartItem item = (ShopCartItem)_CartItems[ID];if(item == null){return;}else{if(Quantity > 0) //商品数量必须大于0            {item.Quantity = Quantity;}_CartItems[ID] = item;}}/// <summary>/// 清空购物车/// </summary>    public void ClearCart(){_CartItems.Clear();}}/// <summary>/// [购物车具体]商品类/// </summary>[Serializable]public class ShopCartItem{private string _ID;//产品GUID    private string _Name;//产品名称    private string _DeliveryName;//物流产品名    private double _Price=0;//产品单价(结算价格)    private int _Score = 0;//产品单个积分    private int _Quantity = 1;//产品数量    private string _ProductId;//产品自定义编号    private string _PicUrl;//图片地址    private double _MarketPrice=0;//市场价格    private double _VipPrice=0;//VIp价格    private double _UserPrice=0;//会员价格    private double _SendPrice=0;//运输费用    private string _ShopID;//商家ID    private string _UrlFrom; //页面来源/// <summary>/// 属性:商品ID/// </summary>    public string ID{get { return _ID; }}/// <summary>/// 属性:商品名称Name/// </summary>    public string Name{get { return _Name; }}/// <summary>/// 属性:商品单价Price/// </summary>    public double Price{get { return _Price; }}/// <summary>/// 单件产品所获积分/// </summary>    public int Score{get{return _Score;}set{_Score = value;}}/// <summary>/// 产品编号/// </summary>    public string ProductId{get{return _ProductId;}set{_ProductId = value;}}/// <summary>/// 产品图片地址/// </summary>    public string PicUrl{get{return _PicUrl;}set{_PicUrl = value;}}/// <summary>/// 市场价格/// </summary>    public double MarketPrice{get{return _MarketPrice;}set{_MarketPrice = value;}}/// <summary>/// VIP价格/// </summary>    public double VipPrice{get{return _VipPrice;}set{_VipPrice = value;}}/// <summary>/// 会员价格/// </summary>    public double UserPrice{get{return _UserPrice;}set{_UserPrice = value;}}/// <summary>/// 运输费用/// </summary>    public double SendPrice{get{return _SendPrice;}set{_SendPrice = value;}}/// <summary>/// 属性:商品数量Quantity/// </summary>    public int Quantity{get { return _Quantity; }set { _Quantity = value; }}/// <summary>/// 商家ID/// </summary>    public string ShopID {get { return _ShopID; }set { _ShopID = value; }}/// <summary>/// 页面来源/// </summary>    public string UrlFrom{get { return _UrlFrom; }set { _UrlFrom = value; }}/// <summary>/// 购物车商品项完整构架函数/// </summary>/// <param name="ID">产品ID</param>/// <param name="Name">产品名称</param>/// <param name="DeliveryName">产品物流名称</param>/// <param name="Price">产品单价(计算价)</param>/// <param name="Score">产品积分</param>/// <param name="ProductId">产品编号</param>/// <param name="PicUrl">产品图片</param>/// <param name="MarketPrice">会员价格</param>/// <param name="UserPrice">市场价格</param>/// <param name="VipPrice">VIp价格</param>/// <param name="SendPrice">运输费用</param>/// <param name="ShopID">商家ID</param>/// <param name="UrlFrom">页面来源</param>    public ShopCartItem(string ID, string Name, string DeliveryName, double Price, int Score, string ProductId, string PicUrl, double MarketPrice, double UserPrice, double VipPrice, double SendPrice, string ShopID, string UrlFrom){_ID = ID;_Name = Name;_DeliveryName = DeliveryName;_Quantity = 1;_Price = Price;_Score = Score;_ProductId = ProductId;_PicUrl = PicUrl;_MarketPrice = MarketPrice;_UserPrice = UserPrice;_VipPrice = VipPrice;_SendPrice = SendPrice;_ShopID = ShopID;_UrlFrom = UrlFrom;}/// <summary>/// 购物车商品项简单构架函数/// </summary>/// <param name="ID">产品ID</param>/// <param name="Name">产品名称</param>/// <param name="Price">产品单价(计算价)</param>    public ShopCartItem(string ID, string Name, double Price){_ID = ID;_Name = Name;_DeliveryName = "";_Quantity = 1;_Price = Price;_Score = 0;_ProductId = "";_PicUrl = "";_MarketPrice = 0;_UserPrice = 0;_VipPrice = 0;_SendPrice = 0;_ShopID = "";_UrlFrom = "";}/// <summary>/// 购物车商品项构架函数/// </summary>/// <param name="ID">产品ID</param>/// <param name="Name">产品名称</param>/// <param name="Price">产品单价(计算价)</param>/// <param name="UrlFrom">页面来源</param>    public ShopCartItem(string ID, string Name, double Price,string UrlFrom){_ID = ID;_Name = Name;_DeliveryName = "";_Quantity = 1;_Price = Price;_Score = 0;_ProductId = "";_PicUrl = "";_MarketPrice = 0;_UserPrice = 0;_VipPrice = 0;_SendPrice = 0;_ShopID = "";_UrlFrom = UrlFrom;}/// <summary>/// 购物车商品项标准构架函数/// </summary>/// <param name="ID">产品ID</param>/// <param name="Name">产品名称</param>/// <param name="Price">产品单价(计算价)</param>/// <param name="UrlFrom">页面来源</param>/// <param name="UrlFrom">页面来源</param>    public ShopCartItem(string ID, string Name, double Price,string ShopID, string UrlFrom){_ID = ID;_Name = Name;_DeliveryName = "";_Quantity = 1;_Price = Price;_Score = 0;_ProductId = "";_PicUrl = "";_MarketPrice = 0;_UserPrice = 0;_VipPrice = 0;_SendPrice = 0;_ShopID = ShopID;_UrlFrom = UrlFrom;}}

测试页面:Demo.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Demo.aspx.cs" Inherits="Public_Test_Demo" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"><title>无标题页</title></head><body><form id="form1" runat="server"><div><asp:Label ID="lblResult" runat="server" Text="Label"></asp:Label><br /><br /><asp:Button ID="btnReadCookie" runat="server" Text="读取Cookie中的ShopCart" OnClick="btnReadCookie_Click" /> </div></form></body></html>

  后置代码Demo.aspx.cs文件:
using System;using System.Collections;using System.Web;using System.Runtime.Serialization;using System.Runtime.Serialization.Formatters.Binary;using System.IO;using System.Text;using CNTVS.TOOLS;public partial class Public_Test_Demo : System.Web.UI.Page{string CookieName = "ShopCart";protected void Page_Load(object sender, EventArgs e){if (!IsPostBack){ShopCart SC = new ShopCart();SC.AddItem("1", "ProductName", "ProductName", 0, 0, "ProductID", "", 0, 0, 0, 0, "ShopId", "TestUrl", true);SC.AddItem("2", "ProductName123", "ProductName123", 0, 0, "ProductID123", "", 0, 0, 0, 0, "ShopId111", "TestUrl23", true);//将ShopCart对象写入Cookie            IFormatter fm = new BinaryFormatter();Stream sm = new MemoryStream();fm.Serialize(sm, SC);sm.Seek(0, SeekOrigin.Begin);StreamReader reader = new StreamReader(sm);string strCart = reader.ReadToEnd();reader.Close();HttpCookie hc = new HttpCookie(CookieName);hc.Value = Server.UrlEncode(strCart);hc.Expires = DateTime.Now.AddDays(1);Response.Cookies.Add(hc);}}///// <summary>///// 将ShopCart写入Cookie///// </summary>///// <param name="SC">ShopCart对象</param>///// <param name="CookieName">CookieName，默认为ShopCart</param>    //public static string ShopCartToCookie(ShopCart SC, string CookieName)//{//    if (Utils.CheckNull(CookieName)) { CookieName = "ShopCart"; }//    if (Utils.CheckNull(SC))//    {//        Utils.WriteCookie(CookieName, "");//        return "";//    }//    else//    {//        IFormatter fm = new BinaryFormatter();//        Stream sm = new MemoryStream();//        fm.Serialize(sm, SC);//        sm.Seek(0, SeekOrigin.Begin);//        StreamReader reader = new StreamReader(sm);//        string strCart = reader.ReadToEnd();//        reader.Close();//        Utils.WriteCookie(CookieName, strCart);//        return strCart;//    }//}///// <summary>///// 将Cookie反序列化为ShopCart///// </summary>///// <param name="CookieName">CookieName，默认为ShopCart</param>    //public static ShopCart CookieToShopCart(string CookieName)//{//    if (Utils.CheckNull(CookieName)) { CookieName = "ShopCart"; }//    string StrCart = Utils.GetCookie(CookieName);//    if (Utils.CheckNull(StrCart))//    {//        return null;//    }//    byte[] bt = System.Text.Encoding.Default.GetBytes(StrCart);//    Stream sm = new MemoryStream(bt);//    IFormatter fm = new BinaryFormatter();//    ShopCart SC = (ShopCart)fm.Deserialize(sm);//    if (Utils.CheckNull(SC))//    {//        return null;//    }//    else//    {//        return SC;//    }//}protected void btnReadCookie_Click(object sender, EventArgs e){string StrCartNew = Server.UrlDecode(Request.Cookies[CookieName].Value.ToString());byte[] bt = System.Text.Encoding.Default.GetBytes(StrCartNew);Stream smNew = new MemoryStream(bt);IFormatter fmNew = new BinaryFormatter();ShopCart SCNew = (ShopCart)fmNew.Deserialize(smNew);foreach(ShopCartItem SCI in SCNew.CartItems){lblResult.Text += "<br/>产品名称:" + SCI.Name;}}}