Question

I’m trying to build a SL app with a TreeView in it. Here’s my XAML:

<UserControl xmlns:controls='clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit'              xmlns:tkwin='clr-namespace:System.Windows;assembly=System.Windows.Controls.Toolkit'              xmlns:basics='clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls'                           xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'               xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'     x:Class='SL.MyApp.Page'     Width='800' Height='600'>     <controls:DockPanel>                 <controls:TreeView Name='siteTree' controls:DockPanel.Dock='Left' Width='150'>             <controls:TreeView.ItemTemplate>                 <tkwin:HierarchicalDataTemplate ItemsSource='{Binding Children}'>                     <StackPanel Orientation='Horizontal'>                                                 <TextBlock Text='{Binding Name}'/>                     </StackPanel>                 </tkwin:HierarchicalDataTemplate>                </controls:TreeView.ItemTemplate>         </controls:TreeView>          <basics:TabControl controls:DockPanel.Dock='Right' TabStripPlacement='Top'>             <basics:TabItem Header='Sites'></basics:TabItem>             <basics:TabItem Header='Lists'></basics:TabItem>             <basics:TabItem Header='Users'></basics:TabItem>         </basics:TabControl>           </controls:DockPanel> </UserControl> 

And the relevant codebehind:

namespace SL.MyApp {     public partial class Page : UserControl     {         private ObservableCollection<WebDescriptor> _webHierarchy = new ObservableCollection<WebDescriptor>();           public Page(WebsSvc.WebsSoapClient websClient)         {                        InitializeComponent();              siteTree.ItemsSource = _webHierarchy;              websClient.GetWebCollectionCompleted                  += new EventHandler<SL.SiteBuilder.WebsSvc.GetWebCollectionCompletedEventArgs>(websClient_GetWebCollectionCompleted);             websClient.GetWebCollectionAsync();              // TODO: some kind of spinner or progress bar needs to be started.         }          void websClient_GetWebCollectionCompleted(object sender, SL.SiteBuilder.WebsSvc.GetWebCollectionCompletedEventArgs e)         {             foreach (XElement xe in e.Result.Elements())             {                 _webHierarchy.Add(ServiceObjectParser<WebDescriptor>.Parse(xe));             }         }           } } 

Update: The WebDescriptor class:

public class WebDescriptor {     public string Title { get; set; }     public string Url { get; set; }     public List<WebDescriptor> Children { get; set; } } 

My problem is that nothing renders in the TreeView at all. I have verified that the results obtained in websClient_GetWebCollectionCompleted are valid and correct, but….nothing.

Any ideas?

Answer 1

After looking at the binding trace output, I finally realized I was trying to bind to a field instead of a property.

Doh!