webform1.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="test6_7.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="清空购物车" OnClick="Button1_Click" />
<asp:Button ID="Button2" runat="server" Text="添加" OnClick="Button2_Click" /><br />
<asp:Label ID="Label1" runat="server" Text="" ForeColor="Blue"></asp:Label>
</div>
</form>
</body>
</html>
webform1.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace test6_7
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Label1.Text = "商品数量:0";
}
protected void Button1_Click(object sender, EventArgs e)
{
Session["ItemCount"] = 0;
Label1.Text = "商品数量:" + Session["ItemCount"];
}
protected void Button2_Click(object sender, EventArgs e)
{
if (Session["ItemCount"] != null)
{
int i = int.Parse(Session["ItemCount"].ToString());
i++;
Session["ItemCount"] = i;
}
else
{
Session["ItemCount"] = 1;
}
Label1.Text = "商品数量:" + Session["ItemCount"];
}
}
}