Charles Petzold

I couldn't find any good examples of using RelativeSource in a Binding, so here's a RelativeSourceDemo.xaml file that has three of them. The file is also listed here:

<!-- =====================================================
      RelativeSourceDemo.xaml (c) 2006 by Charles Petzold 
     ===================================================== -->
<StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            TextBlock.FontSize="12" >

    <StackPanel Orientation="Horizontal"
                HorizontalAlignment="Center">
        <TextBlock Text="This TextBlock has a FontFamily of " />
        <TextBlock Text="{Binding RelativeSource={RelativeSource self},
                                  Path=FontFamily}" />
        <TextBlock Text=" and a FontSize of " />
        <TextBlock Text="{Binding RelativeSource={RelativeSource self}, 
                                  Path=FontSize}" />
    </StackPanel>

    <StackPanel Orientation="Horizontal"
                HorizontalAlignment="Center">
        <TextBlock Text="This TextBlock is inside a StackPanel with " />
        <TextBlock Text=
            "{Binding RelativeSource={RelativeSource 
                            AncestorType={x:Type StackPanel}}, 
                      Path=Orientation}" />

        <TextBlock Text=" orientation" />
    </StackPanel>

    <StackPanel Orientation="Horizontal"
                HorizontalAlignment="Center">
        <TextBlock Text="The parent StackPanel has " />
        <TextBlock Text=
            "{Binding RelativeSource={RelativeSource 
                            AncestorType={x:Type StackPanel}, AncestorLevel=2},
                      Path=Orientation}" />

        <TextBlock Text=" orientation" />
    </StackPanel>
</StackPanel>

It's not very exciting, but at least it works with the February CTP. Notice the comma in front of AncestorLevel, which doesn't appear in the documentation.