BACK button issue while logout.

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After click the back button , it redirects to login window, if i click the back button the browser it goes to the previous page, I cleared the session for all the variables in asp.net with c#, and added the following lines to clear cache still it goes to the previous page, please help it very urgent

Posted 21-Dec-11 17:19pm

kaarthick kanagaraj

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suhailnoorpawane 21-Dec-11 23:39pm

Please check the url is it Returning some Return Url or something.

Do reply

Thanks and regards

Praveen Kullu 21-Dec-11 23:45pm

Which lines did you add?

6 solutions

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santhosh-padamatinti · Answer 1 · 2011-12-21T17:35:00

There are different approaches to avoid this. The best and secured approach is on page load check the session value. If it exists go with functionality other wise redirect to the login page.

if (!string.IsNullOrEmpty(Convert.ToString(Session["username"])))
        {
            //continue logic
        }
        else
        {
            Response.Redirect("login.aspx");
        }

arunrv · Answer 2 · 2011-12-21T17:47:00

write this code in logout link button

XML

Session.Abandon();
       Response.Write("<script>window.top.navigate('../login.aspx')</script>");

the above script disables the back button of the internet explorer

or else you can write like this
in each page in Page_Load event

C#

protected void Page_Load(object sender, EventArgs e)
    {
        if (Session.Count > 0)
        {
            //show this page
        }
        else
            Response.Redirect("Login_page.aspx");
    }

Hope this will help you

Praveen Kullu · Answer 3 · 2011-12-21T17:55:00

Try the javascript method:

In the <head></head> section add the following javascript code:

XML

<script type="text/javascript" language="javascript">
function noBack()
{
window.history.forward()
}
noBack();
window.onload=noBack;
window.onpageshow=function(evt){if(evt.persisted)noBack()}
window.onunload=function(){void(0)}
</script>

call this function using:

body onload="noBack();

source:http://forums.asp.net/t/1452128.aspx/1[^]

thatraja · Answer 4 · 2011-12-21T18:50:00

Solution 5

Check this Tip/Trick

Browser back button issue after logout[^]

Posted 21-Dec-11 18:50pm

thatraja

Sachin Suryawanshi · Answer 5 · 2011-12-21T20:12:00

Solution 6

This is not depend on Session.

This is the setting of browser..

When you click on back button then Page_Load event will not fire.

Hence just use javascript to Move forward only..

Posted 21-Dec-11 20:12pm

Sachin Suryawanshi

Tanveer A · Answer 6 · 2011-12-21T17:31:00

Solution 1

there is no command to stop previous or forward page navigation
while opening your page do menubar & toolbar display no. so the user can't move previous or forward page.

Posted 21-Dec-11 17:31pm

Tanveer A