ASP.NET实例：利用对象序列化将购物车保存在Cookie中_[Asp.Net教程]
ASP.NET实例：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)
using System;
using System.Collections;
///
/// 购物车类
/// [Serializable]
public class ShopCart
{
public Hashtable _CartItems = new Hashtable();
///
/// 构造函数
/// public ShopCart()
{
///to do something
}
///
/// 返回购物车中的所有商品(接口类型)
/// public ICollection CartItems
{
get { return _CartItems.Values; }
}
///
/// 购物中所有商品的价格合计
/// public double Total
{
get
{
double sum = 0;
foreach (ShopCartItem item in _CartItems.Values)
{
sum += ((item.Price * item.Quantity) + item.SendPrice);
}
return sum;
}
}
///
/// 返回购物车里所有商品的数量
/// public double TotalNum
{
get
{
double sum = 0;
foreach (ShopCartItem item in _CartItems.Values)
{
sum += item.Quantity;
}
return sum;
}
}
///
/// 向购物车里添加某商品
/// ///
商品ID
///
商品名称
///
商品单价
///
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
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;
}
}
///
/// 从购物车里移除某商品
/// ///
商品ID
///
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
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;
}
}
}
}
///
/// 修改购物车里某商品的数量
/// ///
商品ID
///
商品数量
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;
}
}
///
/// 清空购物车
/// public void ClearCart()
{
_CartItems.Clear();
}
}
///
/// [购物车具体]商品类
/// [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
///
/// 属性:商品ID
/// public string ID
{
get { return _ID; }
}
///
/// 属性:商品名称Name
/// public string Name
{
get { return _Name; }
}
///
/// 属性:商品单价Price
/// public double Price
{
get { return _Price; }
}
///
/// 单件产品所获积分
/// public int Score
{
get
{
return _Score;
}
set
{
_Score = value;
}
}
///
/// 产品编号
/// public string ProductId
{
get
{
return _ProductId;
}
set
{
_ProductId = value;
}
}
///
/// 产品图片地址
/// public string PicUrl
{
get
{
return _PicUrl;
}
set
{
_PicUrl = value;
}
}
///
/// 市场价格
/// public double MarketPrice
{
get
{
return _MarketPrice;
}
set
{
_MarketPrice = value;
}
}
///
/// VIP价格
/// public double VipPrice
{
get
{
return _VipPrice;
}
set
{
_VipPrice = value;
}
}
///
/// 会员价格
/// public double UserPrice
{
get
{
return _UserPrice;
}
set
{
_UserPrice = value;
}
}
///
/// 运输费用
/// public double SendPrice
{
get
{
return _SendPrice;
}
set
{
_SendPrice = value;
}
}
///
/// 属性:商品数量Quantity
/// public int Quantity
{
get { return _Quantity; }
set { _Quantity = value; }
}
///
/// 商家ID
/// public string ShopID {
get { return _ShopID; }
set { _ShopID = value; }
}
///
/// 页面来源
/// public string UrlFrom
{
get { return _UrlFrom; }
set { _UrlFrom = value; }
}
///
/// 购物车商品项完整构架函数
/// ///
产品ID
///
产品名称
///
产品物流名称
///
产品单价(计算价)
///
产品积分
///
产品编号
///
产品图片
///
会员价格
///
市场价格
///
VIp价格
///
运输费用
///
商家ID
///
页面来源
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;
}
///
/// 购物车商品项简单构架函数
/// ///
产品ID
///
产品名称
///
产品单价(计算价)
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 = "";
}
///
/// 购物车商品项构架函数
/// ///
产品ID
///
产品名称
///
产品单价(计算价)
///
页面来源
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;
}
///
/// 购物车商品项标准构架函数
/// ///
产品ID
///
产品名称
///
产品单价(计算价)
///
页面来源
///
页面来源
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" %>
无标题页 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);
}
}
/////
///// 将ShopCart写入Cookie
///// /////
ShopCart对象
/////
CookieName，默认为ShopCart
//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;
// }
//}
/////
///// 将Cookie反序列化为ShopCart
///// /////
CookieName，默认为ShopCart
//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 += "
产品名称:" + SCI.Name;
}
}
}