Session Timeout even set the value in web.config on postback

Hi,

There are several method to do that.

You can make a ajax call or you can save your data in cookies and fetch from it when page load happen or each click on check box you pass a querystring in url and after page load you get that value.

Some of methods are following.

http://w3javascripts.com/how-to-persist-checkbox-checked-state-after-page-reload/

http://stackoverflow.com/questions/3313595/saving-checkbox-state-on-reload

http://www.dotnetfunda.com/forums/show/16375/how-to-hold-value-in-viewstate-even-after-refresh-of-page

Please mark as answer if it is useful to you.