Extender controls may not be registered before PreRender.

Anytime I insert a calendar extendar control or any other control from the Ajax toolkit in gridview or detailsview template. I get the page exception error. "Extender controls may not be registered before PreRender". I am using the latest Atlas DLL's.

I noticed other posts about the same subject but no clear or detailed answer to the solution. Any help will be greatly appreciated. Preferebly in vb.net please.

Hi,

by "latest Atlas DLL" do you mean ASP.NET AJAX 1.0 ?

Yes,

I meant ASP.NET AJAX 1.0 Garbin. Thanks for the offer to help. I did eventually found the fix for this problem by trial and error. I simply took the ScriptManager out of the Detailsview Control -Insertview section and placed it on the page I had the Detailsview control and Walla! problem resolved. I am sure this is probably cheating but hey it worked. If anybody has any insight as to why this happens and what is the right fix for it please enlight us all.

Once again to recreate the problem try the following steps.

1. Drag and drop a detailsview control on your page.
2. Bind the detailsview control to any datasource.
3. In Detailsview Insert mode drag and drop a textbox then any drag and drop any Atlas control ( I tried Calendar Extendar) right inside the Detailsview insert item template.
4. Bind Calendar extender to the Textbox.
5. Preview your page on your web browser and you will see the ugly exception "Extender controls may not be registered before PreRender."

Hi,

I'm not sure why it's happening, but the ScriptManager control should always be declared in the page (or in the Master Page) rather than in a control's template.

Thanks man! This fixed my problem.

I ran into this problem after I added a Login Control on my Master Page. I had to move my script manager from my "inner page" into my Master Page and that fixed the problem.

Cheers!