I have a content page, that utilizes a simple MasterPage built with Visual Studio 2008 Pro.
Within the content page I have a RadTreeView and a DetailsView control.
The RadTreeView is bound to a SQL data source.
The RadTreeView is set up as a master/details for the DetailsView.
I have drag and drop configured between nodes to allow the user to re-order nodes (server side).
I have set up a ScriptManagerProxy and RadAjaxManagerProxy on the page.
The page works great. Until you try to leave.
Error: Sys.InvalidOperationException: Handler was not added through the Sys.UI.DomEvent.addHandler method.
I've read other posts here for other controls that exhibit the same symptoms. The solutions they were given was to download the latest version because that bug was fixed in the new version of the control in question (not RadTreeView).
However, I believe I have the latest version. I installed RadControls for ASP.Net AJAX 2008 2.826