ExpandItemByPath: Set Header

[Matthias]

Hi,

I am having some problems with RadTreeView.ExpandItemByPath(...). It does not do anything when I call it.

I guess the problem is that  I did not set headers for the listviewitems, but when I try to set it with the commented setter, the name does not get displayed.

Below you can see the (stripped) XAML for my ListView:

<telerik:RadTreeView ItemsSource="{Binding Items}">

               <telerik:RadTreeView.ItemContainerStyle>
                   <Style TargetType="telerik:RadTreeViewItem">
                       <!--<Setter Property="Header" Value="{Binding Path=Item, Converter={StaticResource ClientTreeItemToTextConverter}}"/>-->
                       <Setter Property="IsDropAllowed" Value="{Binding IsDropAllowed, Mode=TwoWay}"/>
                       <Setter Property="IsLoadOnDemandEnabled" Value="{Binding IsLoadOnDemandEnabled, Mode=TwoWay}"/>
                       <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                       <Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                    </Style>
               </telerik:RadTreeView.ItemContainerStyle>

               <telerik:RadTreeView.ItemTemplate>
                   <HierarchicalDataTemplate ItemsSource="{Binding Children}">
                       <StackPanel Orientation="Horizontal" Margin="2">
                           <Image Margin="0 0 4 0" Source="{Binding Path=Item.Type, Converter={StaticResource NodeTypeToImageConverter}}" VerticalAlignment="Center"/>
                           <TextBlock Text="{Binding Path=Item, Converter={StaticResource ClientTreeItemToTextConverter}}" VerticalAlignment="Center"/>
                       </StackPanel>
                   </HierarchicalDataTemplate>
               </telerik:RadTreeView.ItemTemplate>

          </telerik:RadTreeView>

[Petar Mladenov]

Hi Matthias,

 Similarly to the use of GetItemByPath() method, you have to set telerik:TextSearch.TextPath attached property to indicate which property ( from the ViewModel) to be used as a path segment. Unfortunately, in your case you don't use string property in your ViewModel to bind the Header and you use Converter. Is it possible for you to re-factor your ViewModel to use such string property ?

Greetings,
Petar Mladenov
the Telerik team

[Matthias]

Hi,

thanks for your fast reply.
Introducing a string property ist no problem, but where do I have to set telerik:TextSearch.TextPath ?
Within <telerik:RadTreeView.ItemContainerStyle>
...
</telerik:RadTreeView.ItemContainerStyle>
?

 

 

 

 

[Petar Mladenov]

Hi Matthias,

 You have to set it in the RadTreeView's declaration as an attached property:

<telerik:RadTreeView telerik:TextSearch.TextPath="Header">
...
</telerik:RadTreeView>

All the best,
Petar Mladenov
the Telerik team