Tree view Control



I have a tree view control in my master page,I expand the node on onSelectedNodeChanged event,it works fine but i also need to navigate to a page on the same event and maintain the state of the treeview.
I have been able to expand the node and on clicking it again it takes me to another page but the treenode collapses.I guess i have to maintain the state of the treeview on postback.Can anyone tell me how to so that.


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