Update databound collection not in UI thread

I have a TreeView that uses ObservableCollection as it ItemsSource. Items in
this collection are added and removed in other thread, not UI thread. As
collection changes I get NotSupportedException {"This type of CollectionView
does not support changes to its SourceCollection from a thread different
from the Dispatcher thread."}.
How do I add, remove, clear items in ObservableCollection that is Databound
to a TreeView without using Dispatcher?

Daniel Danilin wrote:

> I have a TreeView that uses ObservableCollection as it ItemsSource.
> Items in
> this collection are added and removed in other thread, not UI thread.
> As
> collection changes I get NotSupportedException {"This type of
> CollectionView
> does not support changes to its SourceCollection from a thread
> different
> from the Dispatcher thread."}.
> How do I add, remove, clear items in ObservableCollection that is
> Databound
> to a TreeView without using Dispatcher?

You can't, you must marshal all calls that modify the collection back to
the Dispatcher thread when it is bound to a UI element.

HTH,
Drew

___________________________________
Drew Marsh
Chief Software Architect
Mimeo.com, Inc. - http://www.mimeo.com
Weblog - http://blog.hackedbrain.com/