Home / Community & Support / Developer Productivity Tools Forums / WPF > ComboBox > Setting SelectionBoxTemplate has no effect when binding to a collection of UserControls

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  Posted on Oct 13, 2011 (permalink)

  Here's my situation (simplified):  I want to bind a collection of user controls to a combo box, but I only want to see the Name of the user controls displayed in the list and displayed as the selected item.
  
  So I have essentially done the following in code: 
  

  var collection = new ObservableCollection<MyUserControl>();

  // Add some items to collection here

  myRadComboBox.ItemsSource = collection;

  
  And my XAML looks something like the following:
  

  <telerik:RadComboBox SelectionBoxTemplate="{StaticResource MyUserControlDataTemplate}" ItemTemplate="{StaticResource MyUserControlDataTemplate}" />

  
  With the static resource defined as...
  

  <DataTemplate x:Key="MyUserControlDataTemplate" >

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

  </DataTemplate>

  
  And when I run the app, and select an item from the drop down, the visual content of the user control is what shows up in the selection box -- not the name.  It appears that when the data bound to ItemsSource is a collection of UserControls, the specified ItemTemplate will be honored, but not the SelectionBoxTemplate.  I have tried to simplify this as much as possible, but I just cannot get it to work.
  
  Fortunately, when I set the ItemsSource property of my RadComboBox to a collection of some other object which had a "Name" property (without making any other changes to the XAML), I got exactly what I expected to see -- the content of the object's Name property showed up in the selection box.
  
  Please tell me that what I'm seeing is not the expected behavior when binding to a collection of user controls!

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• Answer Yana Yana

  Posted on Oct 18, 2011 (permalink)

  Hello,
  
  It is not supported to use UI elements as items of the RadComboBox. Please replace the UserControls with a custom object in order to fix the problem.
  
  All the best,
  Yana
  the Telerik team

  Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>

  Reply

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Home / Community & Support / Developer Productivity Tools Forums / WPF > ComboBox > Setting SelectionBoxTemplate has no effect when binding to a collection of UserControls