TreeView in ComboBox - how to set SelectedItem?

Question

Hi there.

I've embedded a TreeView in a ComboBox by customizing the ControlTemplate and substituting a TreeView instead of the ItemsPresenter. TreeView.ItemsSource is bound to ComboBox.ItemsSource so that I can display hierarchical data bound to the ComboBox.ItemsSource property.

The problem is that I cannot do the same with the ComboBox's SelectedItem property. The behaviour I want is that the selected TreeViewItem should set the SelectedItem of the ComboBox, but I cannot find a way to do this.

Any help appreciated.

Andrew.

Answer 1

I did not try this but I guess it should work

 

in your control template tree view bind to the selected item of the combo box

 

<TreeView SelectedItem="{Binding RelativeSource={RelativeSource AncestorType={x:Type ComboBox} }, Path=SelectedItem }" >

 

try it and let me know how it goes .... fingers crossed

 

Answer 2

You'd think it would be that easy but it seems that SelectedItem is readonly. Also SelectedItem returns a TreeViewItem rather than the object it is bound to. I've yet to figure out how to select a tree view item solely based on the object it is databound to.

Answer 3

I have trouble with this too . This article is useful : http://www.codeproject.com/KB/WPF/WPFComboList.aspx?fid=1543229&select=3142166&fr=26#xx0xx
Still looking for help........