[WPF] Data Binding Hierarchy Issue

[EARNEST]

Hello everybody,

I am new to WPF, and trying to develop a small application using DataBinding following the MVVM paradigm.

I am trying to provide a binding functionality to the ObservableCollection of Documents (my type). The First Label would display a Documents path (available through Attribute property), while the next children - Pages of the Documents - would display appropriate information: page index and page content (an image).

Here is an issue - how can I create a lookup binding to a parent Label? On Button Click command I would like to pass the documents path, which was available earlier in the first DataTemplate.

Is there a way to tackle this issue?
How would you recommend going around it?

Also, is there a better way to tackle "nested" structures (collections within collections)?

Thanks in advance.

<ItemsControl ItemsSource="{Binding Documents}">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <StackPanel>
                <Label Content="{Binding Path=Attribute.Path}"/>
                    <ItemsControl ItemsSource="{Binding Pages}">
                        <ItemsControl.ItemTemplate>
                            <DataTemplate>
                                <StackPanel>
                                    <Label Content="{Binding Index}"/>
                                    <Button Content="{Binding Content}"
                                            Command="{x:Static viewModel:DocViewModel.Tests }" 
                                            CommandParameter="{Binding Path=Attribute.Path}"/> 
                                </StackPanel>
                            </DataTemplate>
                        </ItemsControl.ItemTemplate>
                    </ItemsControl>
                </StackPanel>
            </DataTemplate>
        </ItemsControl.ItemTemplate>
</ItemsControl>    
 

[EARNEST]

I received a tip on this issue.

CommandParameter="{Binding Path=DataContext.Attribute.Path,RelativeSource={RelativeSource AncestorType=ContentPresenter, Mode=FindAncestor,AncestorLevel=2"/>