Binding ContextMenu defined in a DataTemplate to command - contextmenu

Question

Ok, here is my problem: I have a UserControl Template defined in Style.xaml like this
<Style x:Key="ModulProfTemplate" TargetType="{x:Type UserControl}" >
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type UserControl}">
<Border BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true" BorderThickness="{TemplateBinding BorderThickness}" DataContext="{Binding DataContext, RelativeSource={RelativeSource TemplatedParent}}">
<Border x:Name="border" BorderBrush="#004E6CA9" BorderThickness="1.5">
<Grid x:Name="Layout" Background="{Binding Background, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="0.5" DataContext="{Binding}">
<Grid.ContextMenu>
<ContextMenu>
<MenuItem Header="Disponibil" Command="{Binding GridContextMenuCommand}" CommandParameter="disp"/>
<MenuItem Header="Indisponibil" Command="{Binding GridContextMenuCommand}" CommandParameter="indisp"/>
</ContextMenu>
</Grid.ContextMenu>
<Grid.RowDefinitions>
<RowDefinition Height="0.497*"/>
<RowDefinition Height="0.5*"/>
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal" d:LayoutOverrides="Height" HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBlock TextWrapping="Wrap" Text="{Binding SalaSaptPara, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
<TextBlock TextWrapping="Wrap" Text="{Binding MaterieSaptPara, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</StackPanel>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBlock TextWrapping="Wrap" Text="{Binding SalaSaptImpara, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
<TextBlock TextWrapping="Wrap" Text="{Binding MaterieSaptImpara, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="2,0,0,0"/>
</StackPanel>
</Grid>
</Border>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="BorderBrush" TargetName="border" Value="#CA4E6CA9"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
the problem is that i don't know how to bind the command to menuitem. The UserControl's DataContext is set to ViewModel.Luni.M1, and the command is in ViewModel DataContext. So my question is: How do i change the DataContext so i can bind the command?

Answer 1

Solved, all i had to do was add a tag to the border that was bound to my viewmodel's datacontext, and after that use PlacementTarget.Tag.MyCommand, as shown like this :)
<Border x:Name="border" BorderBrush="#004E6CA9" BorderThickness="1.5" Tag="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=my:CadreDidacticeView, AncestorLevel=1}, Path=DataContext}">
<Border.ContextMenu>
<ContextMenu>
<MenuItem Header="Disponibil" Command="{Binding PlacementTarget.Tag.GridContextMenuCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContextMenu}}}">
</MenuItem>
</ContextMenu>
</Border.ContextMenu>