bind command to nested listbox

Question

I'm trying to bind a Command to a nested ListBox inside an itemsControl but somehow I can't find the right DataContext to execute the command.

XAML

<UserControl DataContext="{Binding VM1, Source={StaticResource Locator}}"
  <ItemsControl  ItemsSource="{Binding SceneList}"

    <ListBox ItemsSource="{Binding PartialScenes}" 
             SelectedItem="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ItemsControl}}, Path=DataContext.SelectedPartialScene}" >
         <ListBox.InputBindings>
              <KeyBinding Key="Delete" Command="{Binding DeleteSelectedPartialCommand}"/>
         </ListBox.InputBindings>
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel>
                            <TextBlock>
                                  <Run Text="{Binding Path=Label}"/>
                            </TextBlock>
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate> 
    </ListBox>
  </ItemsControl
</UserControl

VM

public class VM1
{
    public()
    {
          DeleteSelectedPartialCommand= new RelayCommand(Delete); 
    }

    public RelayCommand DeleteSelectedPartialCommand{ get; private set; }
    private void Delete()
    {
        Collection.Remove(SelectedItem);
    }
}

I've tried

 Command="{Binding Path=DataContext.DeleteSelectedPartialCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ItemsControl}}}" />

 and

 Command="{Binding Path=DataContext.DeleteSelectedPartialCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListBox}}}" />

Both options are not working.

Travis Boatman · Accepted Answer · 2015-12-09 23:39:35Z

1

You need to access the root DataContext which is in UserControl.

Add a name to your UserControl

x:Name="MyUserControl"

And then for your command:

Command"{Binding ElementName=MyUserControl, Path=DataContext.DeleteSelectedPartialCommand}"

answered Dec 9, 2015 at 23:39

Travis Boatman

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