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Posted 11 Oct 2013
Licenced CPOL

Prevent browser caching of web pages in which works in all browsers (IE/Firefox..)

, 11 Oct 2013
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In this article I am going to explain how to prevent the browser caching of web pages in It is the one of the biggest issues every developer

This articles was originally at but has now been given a new home on CodeProject. Editing rights for this article has been set at Bronze or above, so please go in and edit and update this article to keep it fresh and relevant.

In this article I am going to explain how to prevent the browser caching of web pages in It is the one of the biggest issues every developer will face.  

Why browser caching?
  To speed up the user experience on the web, most browsers implement a technology called caching. Caching allows information such as WebPages, images, and so on, to be saved on a user’s computer. If the user calls for a previously requested webpage, the browser is able to access the information more quickly by recalling it from a cache, rather than making another request to the site itself.

  One side it is a advantage but when you display sensitive information it will be a big drawback .Recently we have found one problem in our current project where a user will log in and after does some operations and then signs out. If user clicks on back button it will still display the information as if the user was still logged in. Hmmm..... We have tried different ways to handle the issue. But we have faced issues with Firefox .

   So I have decided to write logic in master page load event. And I have added some login in logout page. Here is the code.

Place  this code in master page  in load event

HttpContext.Current.Response.Cache.SetAllowResponseInBrowserHistory(<span style="COLOR:blue;">false</span>);  
Response.Cache.SetValidUntilExpires(<span style="COLOR:blue;">true</span>);


In Logout page Load   add this code

Response.AddHeader(<span>"Pragma"</span>, <span>"no-cache"</span>);
Response.CacheControl = <span>"no-cache"</span>;
Response.Cache.SetAllowResponseInBrowserHistory(<span style="COLOR:blue;">false</span>);
Response.Expires = -1;
ClientScript.RegisterClientScriptBlock(<span style="COLOR:blue;">this</span>.GetType(),<span>"signout"</span>, <span>"DisableHistory()"</span>, <span style="COLOR:blue;">true</span> );

<span class="lnum" id="lnum1">  </span>
write this code in logout mark up page

function DisableHistory() {
function RedirectToHome() {
setTimeout(<span>"window.location = 'Index.aspx'"</span>,0);

call this  RedirectToHome method in body onload of logout page 

<body onload =<span>"RedirectToHome();"</span>>
<span class="kwrd"></span> 
<span class="kwrd">Run the application.Have a fun …</span>


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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The ASP.NET Wiki was started by Scott Hanselman in February of 2008. The idea is that folks spend a lot of time trolling the blogs, googlinglive-searching for answers to common "How To" questions. There's piles of fantastic community-created and MSFT-created content out there, but if it's not found by a search engine and the right combination of keywords, it's often lost.

The ASP.NET Wiki articles moved to CodeProject in October 2013 and will live on, loved, protected and updated by the community.
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