adRotator using TransitionControl

[John]

I have a Telerik transition control binding to a custom class, The transition control accepts needs an image as input.  Can you please tell me how can i bind explicitly telling the element name which have the image reference. Itemsource is an attached property. I have included the code below. I tried Path=AdImage but it did not worked.

I was using http://blogs.telerik.com/blogs/posts/11-01-11/how-to-create-ad-rotator-with-telerik-transitioncontrol-and-coverflow-control-for-silverlight.aspx  to create an adrotator control.



<telerik:RadTransitionControl  x:Name="radControl" adRotator:AdRotatorExtensions.ItemChangeDelay="0:0:3" 
 adRotator:AdRotatorExtensions.CurrentSelectedIndex="0"
                              adRotator:AdRotatorExtensions.IndexChanged="{Binding TopItemCommand, Mode=OneWay}"
                              adRotator:AdRotatorExtensions.ItemsSource="{Binding ImagePaths, Mode=OneWay,Path=AdImage}"
 VerticalAlignment="Center" 
 HorizontalAlignment="Center" Width="650">
<telerik:RadTransitionControl.Transition>
<telerik:MotionBlurredZoomTransition />
</telerik:RadTransitionControl.Transition>

</telerik:RadTransitionControl>


 public static readonly DependencyProperty ItemsSourceProperty =
    DependencyProperty.RegisterAttached("ItemsSource", typeof(IEnumerable), typeof(AdRotatorExtensions), new PropertyMetadata(null, OnItemsSourceChanged));
    
    private static void OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
    var element = d as FrameworkElement;
       var itemsControl = d as ItemsControl; // this is always null it returns a RadTranisitionControl object which doesnt have DisplayMemberName property
   
    var oldValue = e.OldValue as IEnumerable;
    var newValue = e.NewValue as IEnumerable;
       
           if (element != null)
           {
               if (oldValue != null)
               {
                   // Detach the Ad Rotator functionality.
                   element.Loaded -= OnElementLoaded;
                   element.Unloaded -= OnElementUnloaded;
    
                   // If there is a timer attached, stop it.
                   var timer = GetTimer(element);
                   if (timer != null)
                   {
                       timer.Stop();
                   }
               }
    
               if (newValue != null)
               {
                   // Attach the Ad Rotator functionality.
                   element.Loaded += OnElementLoaded;
                   element.Unloaded += OnElementUnloaded;
    
                   // If the target is an ItemsControl and its ItemsSource is not set, set it.
                   if (itemsControl != null && itemsControl.ItemsSource == null && itemsControl.Items.Count == 0)
                   {
                       itemsControl.ItemsSource = newValue;
                       itemsControl.DisplayMemberPath = "AdImage"; // will never reaches here
                   }
               }
           }
       }
    
    
    private static void OnElementLoaded(object sender, RoutedEventArgs args)
    {
    var element = sender as DependencyObject;
    
    // Create the timer and hook-up to the events.
    var timer = new DispatcherTimer();
    timer.Interval = GetItemChangeDelay(element).TimeSpan;
    SetTimer(element, timer);
    
    timer.Tick += (s, e) => MoveToNextElement(element);
    
    timer.Start();
    
    // Make sure the currently pointed element is selected.
    UpdateCurrentlySelectedItem(element);
    }
    
    private static void UpdateCurrentlySelectedItem(DependencyObject element)
    {
    var contentControl = element as ContentControl;
       
    
    
       var source = GetItemsSource(element);
    
    // If there is no source we shouldn't do anything.
    if (source == null) return;
    
    // Find the actual index to be selected (if outside the boundaries of the collection)
    // and find the actual element to be selected.
    var convertedSource = source.Cast<object>();
    var currentIndex = GetCurrentSelectedIndex(element);
    var elementToSelect = convertedSource.ElementAtOrDefault(currentIndex);
    
                ICommand updateValue = null;
                if (contentControl != null)
                {
                    updateValue = contentControl.GetValue(IndexChangedProperty) as ICommand;
                }
    
                if (updateValue != null)
                    if (updateValue.CanExecute(elementToSelect))
                    {
                        updateValue.Execute(elementToSelect);
                        
    
                    }
    
    
    // Update the cotnent of the ContentControl if attached to a ContentControl.
    if (contentControl != null)
    {
    contentControl.Content = elementToSelect;
                    
    }
    }