DataContext of RadContextMenu

[Olivier]

Hello all
I have difficulty with RadContextMenu and particulary DataContext property.
I have a RadWindow ("mainWindow") who contain a RadTreeView. RadTreeView expose Items by HierarchicalDataTemplate, that this items who contains RadContextMenu.
My problem : DataContext of RadContextMenu is always DataContext of Item and I want the DataContext of the RadWindow.
I show you my XAML :

<telerik:RadWindow x:Class="Vue.MainWindow" x:Name="mainWindow"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                   xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation">
<Grid x:Name="mainGrid">
   <telerik:RadTreeView x:Name="radTreeView" Grid.Row="1" ItemsSource="{Binding TypeDatabases}"
      <telerik:RadTreeView.Resources>
                  <HierarchicalDataTemplate DataType="{x:Type Modele:EntiteDatabase}" ItemsSource="{Binding Tables}">
                            <StackPanel Orientation="Horizontal" Height="25">
                                <Image Source="{Binding SourceIcone}" Stretch="Fill" Height="16"/>
                                <TextBlock Text="{Binding Description}" TextAlignment="Left" VerticalAlignment="Center" />
                                <telerik:RadContextMenu.ContextMenu>
                                    <telerik:RadContextMenu InheritDataContext="False" DataContext="{Binding DataContext, ElementName=mainWindow}">
                                        <telerik:RadMenuItem Header="Connexion" Command="{Binding OpenDatabase}" />
                                        <telerik:RadMenuItem Header="Déconnexion" Command="{Binding CloseDatabase}" />
                                    </telerik:RadContextMenu>
                                </telerik:RadContextMenu.ContextMenu>
                            </StackPanel>
                        </HierarchicalDataTemplate>
      </telerik:RadTreeView.Resources>
   </telerik:RadTreeView>
</Grid>
</telerik:RadWindow>

In this solution, I have an error : "cannot find ElementName=mainWindow" and I don't understand
I tried others methods to retrieve the DataContext (Tag in my StackPanel, ....)
Thank to you for help

PS : I am sorry for my english

[Rosen Vladimirov]

Hi Arnaud,

You are not able to use Binding for DataContext in HierarchicalDataTemplate. I've prepared a simple project, which is based on your requirements. Please find it attached and inform us if you have any problems or concerns.

Regards,
Rosen Vladimirov
Telerik

[Olivier]

Thanks for reply
I tried to have a DataContext per HierarchicalDataTemplate. 
I will apply one DataContext for my RadTreeView and play with Visibility for displaying commands depending object selected.
Thanks again