Browser Back button Issue

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Dear Sir,

I am doing a project in asp.net. When I log out from my web application, and click the back button in the browser, then my web application goes back to the previous page.

How can I resolve this issue.??

Thanks in advance,

Dileep

Posted 20-Aug-12 6:44am

dilzz

Updated 20-Aug-12 6:50am

Nueman

v2

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Sergey Alexandrovich Kryukov 20-Aug-12 20:45pm

You do not formulate any problem. I can guess that you don't want to get back to the login form, but everything should be formulated properly. And asking a question is required.
--SA

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Prasad_Kulkarni · Answer 1 · 2012-08-20T18:36:00

Try this code:

JavaScript

<script type="text/javascript" language="javascript">
window.history.forward(1);
document.attachEvent("onkeydown", my_onkeydown_handler);
function my_onkeydown_handler()
{
 switch (event.keyCode)
 {
  case 116 : // F5;
  event.returnValue = false;
  event.keyCode = 0;
  window.status = "We have disabled F5";
  break;
 }
}
</script>

and use this one in code behind

C#

Session.Clear();
Session.Abandon();

Alternative:
On code behind write:

C#

protected void Page_Load(object sender, EventArgs e)
   {      
     HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
     HttpContext.Current.Response.Cache.SetNoServerCaching();
     HttpContext.Current.Response.Cache.SetNoStore();
   }

..and on client side same JavaScript like above:

XML

<script type="text/javascript" language="javascript">
window.history.forward(1);
document.attachEvent("onkeydown", my_onkeydown_handler);
function my_onkeydown_handler()
{
 switch (event.keyCode)
 {
  case 116 : // F5;
  event.returnValue = false;
  event.keyCode = 0;
  window.status = "We have disabled F5";
  break;
 }
}
</script>

Also have a look at following links :
1. Three ways to disable browser back button[^]
2. Use Javascript to restrict user from pressing back button in browser[^]
3. A Thorough examination of browser back button[^]
4. Simple solution[^]

Note: Many of the experts suggest not to disable expected browser behaviour. Instead make your pages handle the possibility of users going back. In other words redirect the user to certain page when user tries to press back button.

Sangramsingh Pawar · Answer 2 · 2012-08-20T06:58:00

Solution 1

see below article
Browser back button issue after logout[^]

Posted 20-Aug-12 6:58am

Sangramsingh Pawar

ridoy · Answer 3 · 2012-08-20T07:03:00

Solution 2

There are a lot of post in codeproject for it..how much you need?
session problem in back button web browser[^]
After Logout Their is Back Button Problem[^]
Detect browser back button to logout[^]
prevent browser backbutton[^]
Browser back button issue after logout[^]

Posted 20-Aug-12 7:03am

ridoy

Sarrrva · Answer 4 · 2012-08-20T07:04:00

XML

<%@ 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 id="Head1" runat="server">
<title>Untitled Page</title>
<script type = "text/javascript" >
function disableBackButton()
{
window.history.forward();
}
setTimeout("disableBackButton()", 0);
</script>
</head>
<body onload="disableBackButton()">
<form id="form1" runat="server">
<div>
This is First page <br />
<br />
Go to Second page
<br />
<br />
<asp:LinkButton ID="LinkButton1" runat="server"
PostBackUrl="~/Default2.aspx">Go to Second Page
</asp:LinkButton></div>
</form>
</body>
</html>

Code behind file for Default.aspx:

C#

protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
string strDisAbleBackButton;
strDisAbleBackButton = "<script language=javascript>\n";
strDisAbleBackButton += "window.history.forward(1);\n";
strDisAbleBackButton += "\n</script>";
ClientScript.RegisterClientScriptBlock(this.Page.GetType(), "clientScript", strDisAbleBackButton);
}
    protected void Page_Init(object Sender, EventArgs e)
    {
        Response.Cache.SetCacheability(HttpCacheability.NoCache);
        Response.Cache.SetExpires(DateTime.Now.AddSeconds(-1));
        Response.Cache.SetNoStore();
    }

Default2.aspx:

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<!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>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    second page
    </div>
    </form>
</body>
</html>

regards
sarva

**AmitGajjar** · Answer 5 · 2012-08-20T18:26:00

Hi,

You have not posted your logout code but i guess you forgot to clear your session information.

Possible changes that you can do to resolve your issues are(if any of below missing),

1) Clear Session information and all other information on logout. if you are not clear session information properly then this behavior may occur.
2) You can even add javascript code in your page so user can't get back to previous page. (this will not work if user will disable javascript)
3) Check if user is really logon in your master page(if you have it), if not then redirect to login page.

Hope this information helps you,

Thanks
-Amit Gajjar

Browser Back button Issue

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