Comments on: How can I expand items in a TreeView? – Part II

By: Bea

Bea — Mon, 25 Jan 2010 19:09:41 +0000

Hi RB,

You will have to remember the node that was expanded and use one of the techniques I explain here to expand it when the page loads.

Bea

By: RB

RB — Mon, 25 Jan 2010 18:24:43 +0000

I have a Silverlight 3 Treeview that comes back with all nodes collapsed after postback. I would like to keep ONLY the parent node that was selected before postback expanded after postback. Do you know how I can accomplish this? Thanks in advance. RB

By: Bea

Bea — Thu, 21 Jan 2010 17:28:05 +0000

Hi Cosmin,

To scroll a TreeView to show the selected node, you can do the following:

TreeViewItem tvi = tv.ItemContainerGenerator.ContainerFromIndex(tv.Items.Count – 1) as TreeViewItem;
tvi.IsSelected = true;
tvi.BringIntoView();

Here you can find a full project that demonstrates this.

Hope this helps.

Bea

By: Cosmin

Cosmin — Tue, 19 Jan 2010 09:13:51 +0000

Do you know how can the treeview position the scroll to the selected node? In case the width of treeview is small.

Thanks

By: Bea

Bea — Sun, 11 Oct 2009 19:52:56 +0000

Hi Martin,

Yes, that bug has been fixed. I remember that the fix was checked in not too long after I wrote this blog post. So it should be in the SL3 toolkit, if not before.

Thanks for posting!

Bea

By: Martin

Martin — Wed, 30 Sep 2009 12:52:15 +0000

Any updates to this information with regards to SL3 and the new toolkit ?

regards
Martin