when I use css friendly, TreeNodeCollpased and TreeNodeExpanded events in treeview do not fire. I'm trying to save treeview state in a dictionary and restore the state. Any idea? (li and ul tags have no id)
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Try with BeforeExpand and BeforeCollapse events – Anirudha Gupta Feb 20 '18 at 11:24
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Thank you for reply. But there are no BeforeExpand and BeforeCollapse events in asp treeview. – Amin Feb 20 '18 at 12:10