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

[Johnathan]

I'm not sure I agree with the assertion that 'You are not able to use Binding for DataContext in HierarchicalDataTemplate'. I say this because I can use a standard ContextMenu (System.Windows.Controls) and the binding works just fine, but the RadContextMenu seems to have the issue in the HierarchicalDataTemplate.  Can you clarify your assertion?

 

<UserControl x:Class="IEToolkit.View.Widget.Dock.Explorer"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:IEToolkit.View.Widget.Dock"
			 xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
	<UserControl.Resources>
		<telerik:RadContextMenu x:Key="ExplorerContextMenuProject" >
			<telerik:RadMenuItem Header="Remove Project" />
			<telerik:RadMenuItem IsSeparator="True" />
			<telerik:RadMenuItem Header="Add Module"
								 IsEnabled="{Binding DataContext.FormAddProject.Visible, RelativeSource={RelativeSource AncestorType=local:Explorer}}"/>
		</telerik:RadContextMenu>

		<ContextMenu x:Key="ctx">
			<MenuItem Header="Remove Project" />
			<Separator />
			<MenuItem Header="Add Module"
					  IsEnabled="{Binding DataContext.FormAddProject.Visible, RelativeSource={RelativeSource AncestorType=local:Explorer}}"/>
		</ContextMenu>

		<DataTemplate x:Key="ExplorerTreeViewProjects">
			<Grid>
				<Grid.Style>
					<Style TargetType="Grid">
						<Setter Property="ContextMenu" Value="{StaticResource ctx}" />
					</Style>
				</Grid.Style>
				<Grid.ColumnDefinitions>
					<ColumnDefinition Width="*" />
				</Grid.ColumnDefinitions>

				<TextBlock Text="{Binding Number}" />
			</Grid>
		</DataTemplate>
		<HierarchicalDataTemplate x:Key="ExplorerTreeViewSites" 
						  ItemTemplate="{StaticResource ExplorerTreeViewProjects}" 
						  ItemsSource="{Binding Projects}">
			<Grid>
				<Grid.Style>
					<Style TargetType="Grid">
						<Setter Property="telerik:RadContextMenu.ContextMenu" Value="{StaticResource ExplorerContextMenuProject}" />
					</Style>
				</Grid.Style>
				<Grid.ColumnDefinitions>
					<ColumnDefinition Width="*" />
				</Grid.ColumnDefinitions>

				<TextBlock Text="{Binding Name}" />
			</Grid>
		</HierarchicalDataTemplate>
	</UserControl.Resources>
	<Grid>
		<telerik:RadTreeView IsVirtualizing="False"
							 ItemsSource="{Binding Sites}"
							 ItemTemplate="{StaticResource ExplorerTreeViewSites}">
			
		</telerik:RadTreeView>
	</Grid>
</UserControl>