Ajaxifing ITemplate programmatically

[Igor]

Hello, I have successfully programmatically ajaxified many composite controls, using the following steps:

1. Inside MyCompositeControl.OnInit: subscribe to Page.PreRender event
2. Inside Page.PreRender event: call AddAjaxSetting on desired child controls

Good!

Now I have a problem because one of my child controls is a FormView and inside I have a ITemplate derived class with many controls.
I’m not able to ajaxify these controls inside ITemplate.
The problem comes from the page lifecycle, that is:

1. MyCompositeControl.OnInit
2. Page.PreRender
3. ITemplate.InstantiateIn

So, during Page.PreRender it’s too early to ajaxify ITemplate subcontrols, because they are not yet created.
But Ajaxifing them at the end of ITemplate.InstantiateIn throws a System.ArgumentNullException.

[Maria Ilieva]

Hi Igor,

Could you please try to add the needed settings in the "CreateChildControls" setting of the composite control as shown in the help topic below:
 http://www.telerik.com/help/aspnet-ajax/ajax-update-in-composite-control.html

and verify if this helps.

Regards,
Maria Ilieva
Telerik