Closed Issue: DynamicPopulateExtenderControlBase - support for Server method that will be perform async postback and update the html [10002]

It is great that most AjaxControlToolkit controls now derive from DynamicPopulateExtenderControlBase, but it would be even better if DynamicPopulateExtenderControlBase allowed for a same page server function call AJAX (UpdatePanel) postpack (instead of only allowing for calls to web services). This would allow dynamic server side controls to be created, populated, and later retreived - instead of just returning static (even if dynamically built) HTML.

Such as (see OnDisplay):
<ajaxToolkit:ModalPopupExtender ID="mpeTest" runat="server"
TargetControlID="lbPopup"
PopupControlID="pnlPopup"
BackgroundCssClass="modalBackground"
OkControlID="btnSave"
CancelControlID="btnCancel"
DropShadow="true"
OnDisplay="mpeTest_OnDisplay" />

The goal would be to have the popup display, but in a "UpdateProgress" state, then when the postpack completes it would show the newly created/bound content.

I can fake this behavior right now by jumping through waay too many hoops... so, it would be nice if it was built in.
Comments: We will check it while working on future releases. Thank you for your comments!