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How to Enable Viewstate and Postback Compression using Telerik

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How to Enable Viewstate and Postback Compression using Telerik


Large ASP.NET pages have big Viewstate size. I think this is one of the biggest downsizes that ASP.NET has because, if you have a big number of web controls in your page,  the page size will increase exponentially after Postback.

A few days ago I found that Telerik AJAX Controls Library also has the RadCompression module which can enable the compression of the Viewstate and the Postback of a page at website level or at page level quite easy. Also I must say that the results are pretty amazing!

Wanna know how good this tool is? Take a look at the following image:

Viewstate Compression

Viewstate Compression

If you have Telerik license and you want to enable RadCompression on your project, please follow the steps below:

  1. Add the following key to the <httpModules> tag from the web.config file. If you don’t find <httpModules> tag, add it too to the <system.Web> tag:
  2. Add to the tag the following key:

    If you use .NET Framework 4.0, please remove the runAllManagedModulesForAllRequests property from tag.

  3. Right click on your UI project, then click Add -> Add ASP.NET folder -> App_Browsers.
  4. Right click on App_Browsers folder -> New Item… -> Select Browser File, rename the file and after that click Add.
  5. Make sure that your .browser file looks like this:

    If you already have a .browser file, just add the tag with refID=”Default”.

    Now you have Viewstate compression enabled! For enabling Postback compression, please continue the tutorial.

  6. For enabling Postback compression, add the following keys to the tag:

    Also add to the tag the following key:


That’s it! You now have Postback and Viewstate compression enabled on your project.

More information about RadCompression module you can find here.



Darius Dumitrescu is a creative Senior CMS Consultant with in depth .NET knowledge, focused on Web Development and Architecture Design.

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