Tuesday, May 12, 2009

How to disable browser's Back button in ASP.NET

Almost every ASP.NET developer face this problem at least once in his entire career. There could be numerous reasons for disabling the browser's back button. The site is secure and the user should not be allowed to go back to the previous page, for online exams site the student should be not allowed to view the question once answered etc could be the reasons for disabling the back button.

What does the browser back button actually do?
The browser maintains a cache of the pages that are visited by the user. Once the user clicks on the back button, the browser flushes the cached version of the page. Now to avoid this situation we can think of two solutions
1. Whenever the user clicks on the "back" button, again redirect the user to the "next" page using the JavaScript: history.forward(1). This JavaScript needs to be written on the onload JavaScript event of the web page. Thus the user will never be able to come to the previous page. But this is not a reliable technique since some of the browser's do not invoke the onload function on pressing the "Back" button.
2. Another solution is to avoid the browser maintaining the cache of the pages that a user visits. Yes, this can be achieved through AsP.NET server side coding. Add the following code to the Page_Load event of ASP.NET web page or MasterPage:
// Disable the Cache
Response.Buffer= true;
Response.Expires =-1500;
Response.CacheControl = “no-cache”;

// Check for your SessionID
if(Session["SessionId"] == null)
Response.Redirect (”Home.aspx”);
This code will disable the cache for the current page. The pages contents are maintained in memory i.e. in buffer. Once the user logout the session and buffer will be cleared. As we are not maintaining the cache for the page, the back button will not work anyways. It means we have successfully disabled the Back button.

Hope this helps you!


Anonymous said...

good one...

nasdeep karanapodulap said...

depricated information

Anonymous said...

hi sandeep,

thanks for posting this on your blog.i have tried your code in my master page but it is not working. i am desinging an online exam site for my project and using IE8. Any help ?

Anonymous said...

can we show the back button and forward button in the disabled state when we moved to the next page?

Sandeep Aparajit said...

No, from Javascript we don't have a direct control over the browser functionality, so we cannot make the Back and Forward button disabled from JS.

Anonymous said...

Not working dude I tried it on my masterpage can you help?


Anonymous said...

This code will work on IE only. We have to use the "two cascading pages" technique where the intermediate page redirects user to the original page via client side JS code.

Anonymous said...


Anonymous said...


Anonymous said...

great work.

Anonymous said...

Can u tell me how to perform same action through PHP

Anonymous said...

Thanks... Great Solution

Mukund said...

Page isn't redirect properly

I have added to master page under


But it is giving me error

Problem loading page

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