RelativeSource的用法

    <Grid x:Name="dockPanel1" Background="Red" Margin="10">
        <DockPanel x:Name="d1" Background="Orange" Margin="10">
            <Grid x:Name="g2" Background="Yellow" Margin="10">
                <DockPanel x:Name="dockPanel2" Background="LawnGreen" Margin="10">
                    <TextBox  x:Name="textBox1" FontSize="24" Margin="10"
                              Text="{Binding Path=Name, RelativeSource={RelativeSource Mode=FindAncestor,AncestorLevel=1,AncestorType= {x:Type DockPanel}}}"/>
                    <TextBox  x:Name="textBox2" FontSize="24" Margin="10"
                              Text="{Binding Path=Name, RelativeSource={RelativeSource Mode=Self}}"/>
                </DockPanel>
            </Grid>
        </DockPanel>
    </Grid>