<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Show Session Timeout Using JavaScript</title>
<style type="text/css">
p{
margin-top:40px;
font-size:25px;
margin:0px auto;
width:auto;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<h1>Show session timeout and redirect to login page using javajcript.please do't refresh the page.</h1>
<p>Keep patience and wait for 1 minutes you will get session expire warning message.</p>
<p>After warning message if you do not respond to it you will be redirected to login page in next 2 minutes.</p>
</form>
</body>
</html>
<script language="javascript" type="text/javascript">
//Session timeout in minute.
var sessionTimeout = "<%= Session.Timeout %>";
//Session timeout warning before 2 minute.
var sessionTimeoutWarning = parseInt(sessionTimeout)-2;
//Session timeout in millisecond.
var sTimeout = parseInt(sessionTimeout) * 60 * 1000;
setTimeout('SessionWarning()', sTimeout);
function SessionWarning() {
//Calculating minutes before timeout in millisecond.
var minutesForExpiry = (parseInt(sessionTimeout) - parseInt(sessionTimeoutWarning));
var message = "Your session will expire in another " + minutesForExpiry + " mins! Please refresh the page before the session expires";
alert(message);
setTimeout('Redirect()', (minutesForExpiry * 1000 * 60));
}
function Redirect() {
alert("Session expired. You will be redirected to login page");
window.location = "Login.aspx";
}
</script>
*******************************************************************************
using System;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Session.Timeout = 3;//in minute
}
}
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