DUPE C# Treeview state expanded
See above…
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DUPE C# Treeview state expanded
See above…
I think that depends upon your treeview. The Telerik treeview does this via viewstate…
http://www.telerik.com/community/forums/aspnet/treeview/how-do-i-maintain-treeview-state-after-postback.aspx
… and this following post suggests a way of hand-rolling this…
http://blog.binaryocean.com/PermaLink,guid,23808645-43b5-4e2a-afb1-53dc8da35636.aspx
I’ve not tried either solution, so can’t vouch for them, but they look promising.