Logout.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;


public partial class Logout : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }

    protected void btnOK_Click(object sender, EventArgs e)
    {
       
        // 清空会话 
        System.Web.Security.FormsAuthentication.SignOut();
        HttpContext.Current.Session["UserID"] = null;
        HttpContext.Current.Session.Abandon();

        HttpContext.Current.Response.Cookies["UserID"].Value = null;
        HttpContext.Current.Response .Cookies .Clear();

        Response.Redirect("exit.htm");
    }
    protected void btnCancel_Click(object sender, EventArgs e)
    {
        Response.Redirect("Desktop.aspx", true);
    }
}