Radtreeview self referencing

[macky]

Hi Telerik Staff,

         I just copy the codes using C#  and it doesn't compile. And I copied it on your  help website : http://www.telerik.com/help/wpf/radtreeview-how-to-bind-to-self-referencing-data.html.

       Please send me  a project  on this.  I hope you will send a zip file for me.

Thanks,
Mac

[Petar Mladenov]

Hello macky,

 I see that you've opened a forum thread for RadTreeView for Silverlight but you have pasted a link from WPF documentation. Here is the SL`s documentation link. I can thought of at least one difference in the code snippets ( HierarchicalDatatemplate in WPF ==> telerik:HierarchicalDataTemplate in SL). Let us know if this helps you.s

Greetings,
Petar Mladenov
the Telerik team

[Vincent]

Hi!! Do you have a complete code for this?? When I copy the code.. they have errors.... thanks... :)

[Vincent]

it says that local hierarchyconverter does not exist... 

[Petar Mladenov]

Hi Vincent,

Probably because your converter class has not been build successfully, have you added System.Linq namespace necessary for the "Where" extension methods? I am attaching a working example created by following the help article. Let us know if this helped you.

Best wishes,
Petar Mladenov
the Telerik team

[Vincent]

Thanks Telerik! I got it now!

[Vincent]

HI! Thank you! I know now the correct code...
But I have some concern.. in your textblock, when I select an item from the treeview, it binds the value. Do you know how to bind the ITEM ID and the Parent ID when I select an item in the treeview?

[Petar Mladenov]

Hello Vincent,

You can do something like so;

<Grid.Resources>
         <local:HierarchyConverter x:Key="HierarchyConverter" />
         <telerik:HierarchicalDataTemplate x:Key="ItemTemplate"
                                           ItemsSource="{Binding Converter={StaticResource HierarchyConverter}}">
             <StackPanel Orientation="Horizontal">
                 <TextBlock Text="{Binding Text}" />
                 <Rectangle Fill="DeepSkyBlue" Height="18" VerticalAlignment="Center" Width="2" />
                 <TextBlock Text="parent ID: " Foreground="Blue"/>
                 <TextBlock Text="{Binding ParentId}" />
                 <Rectangle Fill="DeepSkyBlue" Height="18" VerticalAlignment="Center" Width="2" />
                 <TextBlock Text="Id: " Foreground="Blue" />
                 <TextBlock Text="{Binding Id}" />
             </StackPanel>
         </telerik:HierarchicalDataTemplate>
     </Grid.Resources>

Please let us know if this is what you need.

Best wishes,
Petar Mladenov
the Telerik team

[Angeli]

Hi Petar. How do I update the Text as well as the Parent ID when I add/remove/edit an item through a RadContextMenu?

[Petar Mladenov]

Hi Angeli,

You first have to access the RadTreeViewItem  clicked with the mouse right button when the ContextMenuOpens:

private void ContextMenuOpened(object sender, RoutedEventArgs e)
        {
            RadTreeViewItem treeViewItem = (sender as RadContextMenu).GetClickedElement<RadTreeViewItem>();

You can see this realized in this demo. Then you probably need a twoway binding to a ViewModel ( if you want the visual changes to reflect the data behind). Let us know if you need further assistance on this.

Kind regards,
Petar Mladenov
the Telerik team