If I put a treeview in an update pannel and put any code in its expand /collapse methods the treeview closes the previous node that you expand. This is fine but when I expand a node and try to collapse that same node it does not collapse but rather stay expanded. Therefore I gathered it does the opposite action to the previously clicked node.
Why does this happen in the update panel, it doesn't happen without it?
The treeview control is not supported officially in the updatepanel!
One problem is that (I think) the treeview use hidden fields to maintain the expanded state of the nodes, and that hidden field stay out of the sync (especially when you use EnableClientScript="true" also). There are tons of other treeview features which not works correctly in the updatepanel.
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