Clear ASP page cache – Page_Load() firing multiple time in RadWindow Popup

How to prevent the multiple Page load event in case Telerik Rad Window Popup is used and Clear ASP page cache.

Setting ReloadOnShow property of RadWindow for Popup to true causes its Page_load to be executed multiple times hence redundant multiple database calls causing to some extent of performance hit.

ReloadOnShow needs to be  set to true since page_load/refresh of Popup wasn’t firing on subsequent opens.


We can set ReloadOnShow to false and use alternative code in page_load as following in C#:

below code will clear the cache of ASPX page and thus reloaded every time in browser.

Note : you should run these statement before sending any HTML to the user. If in doubt, use Respose.Buffer = True to buffer all html

Response.AppendHeader("Pragma", "no-cache");
Response.Expires = -1;
Response.CacheControl = "no-cache";

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