Session+Hashtable实现购物车
本文主要描述了如何使用Session、Hashtable实现购物车功能,其中使用Castle.ActiveRecord来完成跟数据库的交互工作。
本程序中以下测试环境中成功运行:Vistual Studio 2005+Sql Server 2005+Castle 2.0
主要内容:
1.Hashtable简介
2.购物车实现方式
3.购物车截图
一、Hashtable简介
在.NET Framework中,Hashtable是System.Collections命名空间提供的一个容器,用于处理和表现类似key/value的键值对,其中key通常可用来快速查找,同时key是区分大小写;value用于存储对应于key的值。Hashtable中key/value键值对均为object类型,所以Hashtable可以支持任何类型的key/value键值对。
在哈希表中添加一个key/value键值对:HashtableObject.Add(key,value);
在哈希表中去除某个key/value键值对:HashtableObject.Remove(key);
从哈希表中移除所有元素: HashtableObject.Clear();
判断哈希表是否包含特定键key: HashtableObject.Contains(key);
二、购物车实现方式
首先先明确一下,购物车中需要保存哪些东西?我觉得只需保存商品ID和商品数量就可以了,为什么呢?因为商品信息是保存在数据库中的,所以只需保存了商品ID就可以从数据库中检索到商品的其它信息,如商品名、商品单价等。至于保存商品数量我想不需要解释了吧。
根据购物车中需要保存的内容再结合Hashtable的特点,所以选用Hashtable来保存购物车信息是比较不错的选择,其中key值为商品ID,value值为商品数量,两者都为int类型。
本购物车系统中,购物车页面为Vehicle.aspx,该页面用来处理购物车的基本操作和显示购物车,每次访问该页面时应传入两个参数:id和opt。其中id为要购买的商品ID,opt是对商品的操作,如增加、减少、删除等。当id和opt值都为0时为查看购物车。
购物车的一些基本操作:
a)、购买商品
需要注意的地方:当购买商品时应判断购物车是是否已有同类商品,若有则只需要商品原有数量上递增1即可,若无只需添加一条新的数量为1的商品信息;
b)、增加已购买商品数量
c)、减少已购买商品数量
需要注意的地方:当减少商品数量时,若商品数量为0则应删除此类商品;
d)、删除已购买商品
完成购物车的基本操之后就是显示购物车了,用以下步骤显示购物车:遍历Hashtable,每次遍历时获取商品ID和商品数量,从数据库中检索商品信息,并把必要的信息显示在页面上。下面帖一下Vehicle.aspx页面的主要代码:































































































































三、购物车截图
a)、购物首页
b)、购物车
四、点击下载源码
【推荐】编程新体验,更懂你的AI,立即体验豆包MarsCode编程助手
【推荐】凌霞软件回馈社区,博客园 & 1Panel & Halo 联合会员上线
【推荐】抖音旗下AI助手豆包,你的智能百科全书,全免费不限次数
【推荐】博客园社区专享云产品让利特惠,阿里云新客6.5折上折
【推荐】轻量又高性能的 SSH 工具 IShell:AI 加持,快人一步