MasterPage.master.cs

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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;

public partial class MasterPage : System.Web.UI.MasterPage
{
    ShoppingCar cookieCart = new ShoppingCar();
    protected void Page_Load(object sender, EventArgs e)
    {

     

        if (Session["Number"] == null)
        {


            cookieCart.Clear();
            Session["Number"] = 0;
        }

        
      

    }
    protected void Timer1_Tick(object sender, EventArgs e)
    {

    }
    protected void LinkButton1_Click(object sender, EventArgs e)
    {

    }
    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        if (Session["Name"] == null)
        {
            Page.ClientScript.RegisterClientScriptBlock(GetType(), "Login", "alert(\"请先登录！\")", true);
        }
        else
        { Response.Redirect("~/ShoppingCar/ShoppingCar.aspx"); }
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        Session["Name"] = null;
        DAL.DataAccess.count = 0;
        Session["UserId"] = null;
        cookieCart.Clear();
        Response.Redirect("~/UI/Login.aspx");
    }
}