ASP.NET购物车实例

首页产品列表，使用的是DataList

Default.aspx

<asp:DataList ID="DataList1" runat="server" Height="187px" Width="475px"> <HeaderTemplate> <table cellpadding="0" cellspacing="0" class="style1"> <tr> <td> 产品编号</td> <td> 产品名称</td> <td> 产品价格</td> <td> 操作</td> </tr> </HeaderTemplate> <ItemTemplate> <tr> <td> <asp:Label ID="lbl_Id" runat="server" Text='<%#Bind("id") %>'></asp:Label> </td> <td> <asp:Label ID="lbl_Name" runat="server" Text='<%#Bind("name") %>'></asp:Label> </td> <td> <asp:Label ID="lbl_Price" runat="server" Text='<%#Bind("price") %>'></asp:Label> </td> <td> <asp:Button ID="btn_Add" runat="server" Text="放入购物车" onclick="btn_Add_Click" CommandArgument='<%#Bind("id") %>' /> </td> </tr> </ItemTemplate> <FooterTemplate> </table> </FooterTemplate> </asp:DataList> 

后台事件

Default.aspx.cs

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Data;using System.Collections;namespace ShopCart{ public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { this.Show(); } } /// <summary> /// 显示产品 /// </summary> public void Show() { string sql = "select id,name,price from product"; DataTable dt = DBHelper.RunSQLReturnDT(sql); DataList1.DataSource = dt; DataList1.DataBind(); } /// <summary> /// 增加购物车 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btn_Add_Click(object sender, EventArgs e) { Button btn = sender as Button; string id = btn.CommandArgument;//获取其ID Hashtable tb = null; if (Session["shopcart"] == null) { //创建购物车 tb = new Hashtable(); } else { //取出购物车 tb = Session["shopcart"] as Hashtable; } //判断购物车内是否已存在此商品 if (tb[id] == null) { tb.Add(id, 1);//不存在，默认加1 } else//存在的话就累加 { int num = int.Parse(tb[id].ToString()); num++; tb[id] = num; } Session["shopcart"] = tb; Response.Redirect("Cart.aspx"); } }} 

 

购物车页面Cart.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Cart.aspx.cs" Inherits="ShopCart.Cart" MasterPageFile="~/Site.Master" %><asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent"> </asp:Content><asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"> <asp:Label ID="lbl_error" runat="server" Text="没有数据"></asp:Label> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Height="87px" Width="591px" onrowdeleting="GridView1_RowDeleting" onrowcancelingedit="GridView1_RowCancelingEdit" onrowediting="GridView1_RowEditing" onrowupdating="GridView1_RowUpdating"> <Columns> <asp:BoundField DataField="id" HeaderText="商品编号" ReadOnly="True" /> <asp:BoundField DataField="name" HeaderText="商品名称" ReadOnly="True" /> <asp:BoundField DataField="price" HeaderText="商品单价" ReadOnly="True" /> <asp:TemplateField HeaderText="商品总价"> <ItemTemplate> <asp:Label ID="Label1" runat="server" Text='<%# getTotal(Eval("num").ToString(),Eval("price").ToString()) %>'></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="商品数量"> <EditItemTemplate> <asp:TextBox ID="txt_num" runat="server" Height="21px" Text='<%# Bind("num") %>' Width="86px"></asp:TextBox> </EditItemTemplate> <ItemTemplate> <asp:Label ID="Label2" runat="server" Text='<%# Bind("num") %>'></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:CommandField ShowEditButton="True" /> <asp:TemplateField ShowHeader="False"> <ItemTemplate> <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Delete" onclientclick="return confirm("确定要删除吗？")" Text="删除"></asp:LinkButton> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView> <a href="Default.aspx" mce_href="Default.aspx">返回继续挑选</a> <asp:Button ID="btn_clear" runat="server" Text="清空购物车" onclick="btn_clear_Click" Height="32px" onclientclick="return confirm("确定要清空吗？")" /></asp:Content> 

后台代码Cart.aspx.cs

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Collections;using System.Data;namespace ShopCart{ public partial class Cart : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { this.ShowCart(); } } /// <summary> /// 显示购物车 /// </summary> public void ShowCart() { if (Session["shopcart"]==null) { lbl_error.Visible = true; GridView1.Visible = false; btn_clear.Visible = false; } else { Hashtable tb = Session["shopcart"] as Hashtable; if (tb.Count > 0) { lbl_error.Visible = false; GridView1.Visible = true; btn_clear.Visible = true; //得到哈希表遍历器 IDictionaryEnumerator ide = tb.GetEnumerator(); string proId = ""; DataTable dt = null; if (tb.Count > 0) { while (ide.MoveNext()) { proId += ide.Key + ","; } int count = proId.Length; proId = proId.Substring(0, proId.Length - 1); } if (proId != "") { string sql = "select * from product where id in(" + proId + ")"; dt = DBHelper.RunSQLReturnDT(sql); dt.Columns.Add("num"); for (int i = 0; i < dt.Rows.Count; i++) { string bid = dt.Rows[i]["id"].ToString(); dt.Rows[i]["num"] = tb[bid]; } } GridView1.DataSource = dt; GridView1.DataBind(); } else { lbl_error.Visible = true; GridView1.Visible = false; btn_clear.Visible = false; } } } /// <summary> /// 清空购物车 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btn_clear_Click(object sender, EventArgs e) { Session.Remove("shopcart"); Response.Write("<mce:script type="text/javascript"><!--alert('清空成功');location.href('Cart.aspx');// --></mce:script>"); } /// <summary> /// 删除购物车 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) { int rows = e.RowIndex; string id = GridView1.Rows[rows].Cells[0].Text; Hashtable tb = Session["shopcart"] as Hashtable; tb.Remove(id); Session["shopcart"] = tb; Response.Write("<mce:script type="text/javascript"><!--alert('删除成功');location.href('Cart.aspx');// --></mce:script>"); } /// <summary> /// 显示编辑 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) { GridView1.EditIndex = e.NewEditIndex; this.ShowCart(); } /// <summary> /// 取消编辑 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { GridView1.EditIndex = -1; this.ShowCart(); } /// <summary> /// 执行数量修改 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) { int rows = e.RowIndex; TextBox txt = GridView1.Rows[rows].FindControl("txt_num") as TextBox; string id = GridView1.Rows[rows].Cells[0].Text; Hashtable tb = Session["shopcart"] as Hashtable; tb[id] = txt.Text; Session["shopcart"] = tb; GridView1.EditIndex = -1; Response.Write("<mce:script type="text/javascript"><!--location.href('Cart.aspx');// --></mce:script>"); } /// <summary> /// 计算价格 /// </summary> /// <returns></returns> protected static string getTotal(string num,string price) { decimal total = int.Parse(num) * Decimal.Parse(price); return total.ToString(); } }} 

 

想要代码的，可以到我的资源里去找，我用的是VS2010写的