Question : dynamic popup with checklistbox using ajax control toolkit

I have a repeater which is using the asp.net ajax control toolkit to render a panel that contains a checkboxlist.  During Itemdatabound i populate this checkboxlist and select the items that should be checked.  What I would like to avoid is having the repeater render 60 rows with each row having a panel that contains 50 checkboxlist items.  What I would like to do is when the popup is called, generate the checkboxlist within the panel.  This panel has a button which when clicked calls the method for deleting the old values and inserting the new selections.  Postback is not a problem at this point so either async or not is fine.

An example of this or something similiar dealing with a dynamic popup and then posting back the checklist values would be awesome.  

Thank you fo ay advise you can provide.  

Cheers,
Keith

Answer : dynamic popup with checklistbox using ajax control toolkit

Keith,

If you don't want to data-bind when the Repeater is data-bound, when would you like to add the CheckBox controls? Would there be a button action that would trigger this?

I have been researching on-demand blogs, like this:

Building on demand Master/Detail grouping Grid with GridView and ASP.NET AJAX toolkit CollapsiblePanelExtender
http://mosesofegypt.net/page/Building-on-demand-MasterDetail-grouping-Grid-with-GridView-and-ASPNET-AJAX-toolkit-CollapsiblePanelExtender.aspx

The main premise is use a JQuery to consume AJAX web services.  With this approach, you can have client-side lazy loading of data, so that you don't have do the work up front when it is not always needed.