WPF Tree view middle level nodes not getting collpsed.

See more:

WPF

treeview

Hi,

I have used hierarchical data template in tree view to get nodes dynamically and the tree has three level means one node can be expanded till three levels like-

-root1
..-child1
....subchild11
....subchild12

-root2
..-child2
....subchild21
....subchild22
.....
.....

and so on. My requirement is to expand the roots but to collapse the immediate children-like

-root1
..+child1
-root2
..+child2

the code that I am using is-

<telerik:RadTreeView ItemsSource="{Binding Path=OrderedProductsByRun}" ItemTemplate="{StaticResource OrderedProductsByRun}" Height="300" ScrollViewer.VerticalScrollBarVisibility="Auto"
                                         ExpanderStyle="{StaticResource ExpandCollapseToggleStyle}" TabIndex="6" IsSingleExpandPath="True">
                            <telerik:RadTreeView.ItemContainerStyle>
                                <Style>
                                    <Setter Property="telerik:RadTreeViewItem.IsExpanded" Value="True"/>
                                </Style>
                            </telerik:RadTreeView.ItemContainerStyle>
                        </telerik:RadTreeView>
<HierarchicalDataTemplate 
      x:Key="OrderedProductsByRun"
      ItemsSource="{Binding Path=RoutesForRun}"
      ItemTemplate="{StaticResource RoutesForRun}"
      >
     <Stackpanel.........></Stackpanel>
<Stackpanel.........></Stackpanel>
<Stackpanel.........></Stackpanel>

</HierarchicalDataTemplate>
<HierarchicalDataTemplate 
      x:Key="RoutesForRun"
      ItemsSource="{Binding Path=OrderActivityDetails}"
      ItemTemplate="{StaticResource OrderActivityDetails}" 
      >
<Stackpanel.........></Stackpanel>
<Stackpanel.........></Stackpanel>
<Stackpanel.........></Stackpanel>
</HierarchicalDataTemplate>


                        <DataTemplate x:Key="OrderActivityDetails">
<Stackpanel.........></Stackpanel>
<Stackpanel.........></Stackpanel>
<Stackpanel.........></Stackpanel>

                        </DataTemplate>