I know that the doc's specifically say that it doesn't do this, but it should. Further both the server- and client- side events should fire. This is true of the RadTreeView as well as any of the newer controls that include a TreeView in their core functionality, (DropdownTree, TreeList).
ADD: Copy node on Drag And Drop TreeView
How we can save the listbox items to radtree view in ajax.(when we drag it on drop on radtreeview ) and i will save that value on database in sequence mode.this is my problem