Skip to main content

How to do auto logout and redirect to login page when session expires using asp.net?

In this article I will explain you how to auto logout and redirect to
 login page when users session expires within specific period.

Introduction


In every applications, we need to maintain the session expiration time 
say for example 1hr or 30 minuets and this configuration item we
 can do with web.config file or in IIS. But here, application should 
redirect to login page automatically when session expires.

Configure session time


First configure the session timeout value in web.config file as like
 below, here I’m configuring the session timeout value as 3 minutes
 for this sample .

<system.web>



<sessionState mode="InProc" timeout="3"></sessionState>



</system.web>

 

Create Pagebase class


create a custom pagebase class and write the common functionality codes into this class. Through this class, we can share the common functions to other web pages. In this class we need inherit the System.Web.UI.Page class. Place the below code into Pagebase class.e

public class PageBase : System.Web.UI.Page



{



protected override void OnPreRender(EventArgs e)



{



    base.OnPreRender(e);



    AutoRedirect();



}



public void AutoRedirect()



{



int int_MilliSecondsTimeOut = (this.Session.Timeout * 60000);



string str_Script = @"



   <script type='text/javascript'> 



    intervalset = window.setInterval('Redirect()'," + int_MilliSecondsTimeOut.ToString() + @");



    function Redirect()



    {



       alert('Your session has been expired and system redirects to login page now.!\n\n');



       window.location.href='/login.aspx'; 



    }



</script>";



ClientScript.RegisterClientScriptBlock(this.GetType(), "Redirect", str_Script);



}



}

 


Above AutoRedirect function will be used to redirect the login page when session expires, by using javascript window.setInterval, This window.setInterval executes a javascript function repeatedly with specific time delay. Here we are configuring the time delay as session timeout value. Once it’s reached the session expiration time then automatically executes the Redirect function and control transfer to login page.
In testAutologout page, we need to inherit the PageBaseclass as like below also same thing we need to inherit wherever required this functionality.

using System;



using System.Collections.Generic;



using System.Linq;



using System.Web;



using System.Web.UI;



using System.Web.UI.WebControls;



namespace TestWeb



{



 public partial class testAutoLogout : PageBase



{



    protected void Page_Load(object sender, EventArgs e)



{







}



}

}
 

Once application reached session expiration time if suppose there is no action performed by user, it shows the warning message as like below and if clicks the Ok in the message box it redirects to login.aspx page.

Comments

Post a Comment

Popular posts from this blog

Claims Class For security in .NET4.5 with C#

What is Claim ? A claim in the world of authentication and authorization can be defined as a statement about an entity, typically a user. A claim can be very fine grained: Ram is an admin Ram’s email address is Ram@yahoo.com Ram lives in Mumbai Tom’s allowed to view sales figures between 2009 and 2012 Tom’s allowed to wipe out the universe Claims originate from a trusted entity other than the one that is being described. This means that it is not enough that Tom says that he is an administrator. If your company’s intranet runs on Windows then Tom will most likely figure in Active Directory/Email server/Sales authorisation system and it will be these systems that will hold these claims about Tom.  The idea is that if a trusted entity such as AD tells us things about Tom then we believe them a lot more than if Tom himself comes with the same claims . This external trusted entity is called an  Issuer . The KEY in the key-value pairs is called a  Typ...
1 comment
Read more

Paytm integration

How to integrate Paytm to asp.net site   You will need to create an Checksum on your server. Kindly refer the dll file for the attachment.  Usage of CheckSum API: ·         Add provided “paytm.dll” as a “Reference” in your project. ·         Import namespace “paytm” in your Class with statement “using paytm”. ·         Now Generate CheckSum API as well as Verify CheckSum API are available as follows: o   String CheckSum.generateCheckSum(String masterKey, Dictionary<String, String> parameters) o   Boolean CheckSum.verifyCheckSum(String masterKey, Dictionary<String, String> parameters, StringcheckSum) ·         For Generating CheckSum, use following snippet code: String masterKey = “merchantKey” ; Dictionary<String, String> parameters = new Dictionary<string, string>(); p...
Post a Comment
Read more

Javascript ECMAScript6 New Feature

Extended Parameter Handling Another nice set of features introduced in ES6 is the extended parameter handling. These provide a very nice set of idioms that bring us very close to languages like C# or Java. Default parameter values and optional parameters Default parameters allow your functions to have optional arguments without needing to check arguments.length or check for undefined. Let’s take a look at what that might look like: let greet = (msg = 'hello', name = 'world') => {   console.log(msg,name); } greet(); greet('hey'); Looking at the preceding code, you can see that we are using the new fat arrow (=>) syntax as well as the new let keyword. Neither of those are necessary for this example, but I added it to give you more exposure to the new syntax. Running the preceding code produces the following result: hello world hey world  Rest parameter Handling a function with a variable number of arguments is always t...
Post a Comment
Read more