Crash when closing RadPane created from Binding

[Thomas]

Hi,
I have a problem with RadPaneGroup. I want to create RadPanes dynamically via a binding on ItemsSource of RadPaneGroup. The list for the binding is a ObservableCollection<RadPane>. Everything works as expected until it want to close these RadPanes and click on the "x"-button. The program crashes instantly with the following exception:
"Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead."

We use version 2011.1.315.35 of the Telerik components.

Viewmodel base:

public class ViewModelBase : INotifyPropertyChanged
{
  public String DisplayName { get; set; }

  protected void RaisePropertyChanged(string propertyName)
  {
    if (PropertyChanged != null)
    {
      PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
  }

  public event PropertyChangedEventHandler PropertyChanged;
}

Viewmodel:

public class TestViewModel : Model.ViewModelBase
{
  private ObservableCollection<RadPane> m_PaneList = new ObservableCollection<RadPane>();

  public ObservableCollection<RadPane> PaneList
  {
    get { return m_PaneList; }
    set
    {
      m_PaneList = value;
      RaisePropertyChanged("PaneList");
    }
  }
}

Docking definition in XAML:

<telerik:RadDocking Grid.Row="1" HasDocumentHost="True" HorizontalAlignment="Stretch" Name="radDocking1" VerticalAlignment="Stretch">
  <telerik:RadSplitContainer>
    <telerik:RadPaneGroup Name="radPaneGroup1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" ItemsSource="{Binding Path=PaneList}">
    </telerik:RadPaneGroup>
  </telerik:RadSplitContainer>
</telerik:RadDocking>

Creation of the RadPanes:

TestViewModel testViewModel = this.DataContext as TestViewModel;
RadPane pane = new RadPane {Header = "Test"};
if (testViewModel != null)
{
  testViewModel.PaneList.Add(pane);
}

 
Am I doing anything wrong here?

[Konstantina]

Hi Thomas,

The ItemsSource property is not supported. Please use instead the Items property of the RadPaneGroup. For a complete list of all unsupported properties please refer to this help article.

Greetings,
Konstantina
the Telerik team

[Muhammad Irfan]

Hi Konstantina,
So its mean we can't use MVVM bindings in RadDocking? Is there any other alternative to dynamically create and then bind RadPanes to RadDocking?

[Konstantina]

Hello Muhammad,

You can find an example how to implement RadDocking and MVVM pattern in this forum post.

Hope this helps.

Greetings,
Konstantina
the Telerik team

[Muhammad Irfan]

Thank you Konstantina, this post really help.