Hi James,

I'm aware of the character of the __EVENTARGUMENT. The thing is I load user controls dynamically and therefore I need to initialize them in the Page_Init event of the page because otherwise (for example when I would do this in Page_Load or later) the event wiring up of that user control would not work anymore.

When I would use your solution and I already tried it in NodeSelectChanged its the same problem: Its AFTER Page_Init.

Also another issue is that it seems when you use LoadOnDemand the Nodes collection is always empty? I can at no stage get any node back from the TreeView. Not before and not after Page_Load??

THank you.