Home / Community & Support / Developer Productivity Tools Forums / Silverlight > TreeView > Parent-Child relation in treeview

• Ivan

  Posted on Jan 27, 2012 (permalink)

  This is a simplified version of my class

  public class Item

  {

  int _id;
 string _name;

  Item _parentItem;

  ObservableCollection<Item> _childItems;

  }

  The thing I want to do is to have them in a treeview acording to their relationship. And this is how I did it.

  <telerikNavigation:RadTreeView

     ItemsSource="{Binding TreeItems,Converter={StaticResource HierarchyConverter}}"

     ItemTemplate="{StaticResource TreeTemplate}"/>

   

  <converter:HierarchyConverter x:Name="HierarchyConverter"/>

  <telerik:HierarchicalDataTemplate

     x:Key="TreeTemplate"

      ItemsSource="{Binding Converter={StaticResource HierarchyConverter}}">

            <TextBlock Text="{Binding Name}"/>

  </telerik:HierarchicalDataTemplate>

  And I also use this converter

  public class HierarchyConverter : IValueConverter

      {

          public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

          {

              // We are binding an item

              TreeItem item = value as TreeItem;

              if (item != null)

              {

                  return item.Children;

              }

   

              ObservableCollection<TreeItem> items = value as ObservableCollection<TreeItem>;

              if (items != null)

              {

                  return items;

              }

              return null;

          }

          public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)

          {

              throw new NotImplementedException();

          }

      }

  I only get the first "level" and see the arrows next to the name but they won't expand so that I don't know if I did everything correct.
  
  Any help?
  
  Edit:
  
  Added this code

  <telerik:ContainerBindingCollection x:Key="TreeViewItemContainerBinding">

             <telerik:ContainerBinding PropertyName="IsExpanded" Binding="{Binding Path=IsActive, Mode=TwoWay}"/>

             <telerik:ContainerBinding PropertyName="IsSelected" Binding="{Binding Path=IsActive}"/>

         </telerik:ContainerBindingCollection>

  But now everything is expanded and when I click on an item it doesnt look like it's selected... it is just "flashing"
  
  
  
  

  Reply

• Ivan

  Posted on Jan 27, 2012 (permalink)

  Ignore the question...
  
  After I used the code (with the edited part) everything worked fine after I took care that the service which was providing me the data was called only once :)

  Reply

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