如何在XAML中引用数据绑定控件

Question

I'm creating Canvas objects programmatically in my codebehind and adding them to a ListBox.Items . Now I want to create a DataTemplate for my ListBox that displays those Canvas objects with a border and highlights.

Prior to this I was using Images in my ListBox instead of Canvases , and was able to bind to a BitmapImage as the Image.Source property and this worked:

<ListBox Name="LayoutListBox">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <Border Margin="20,0" BorderBrush="Black" BorderThickness="2" Width="195" Height="195">
                <Grid>
                    <Image Source="{Binding}" Stretch="Uniform" />
                    // ...Some overlays and such
                </Grid>
            </Border>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ListBox>

But now that the ListBox.Items is using Canvas objects, I can't figure out how to reference them from the XAML.

<ListBox Name="LayoutListBox">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <Border Margin="20,0" BorderBrush="Black" BorderThickness="2" Width="195" Height="195">
                <Grid>
                    ----HOW DO I REFERENCE MY CANVAS FROM HERE?-----
                    // ...Some overlays and such
                </Grid>
            </Border>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ListBox>  

Answer 1

Got it, ContentPresenter is what I needed.

<ListBox Name="LayoutListBox">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <Border Margin="20,0" BorderBrush="Black" BorderThickness="2" Width="195" Height="195">
                <Grid>
                    <ContentPresenter Content="{Binding}"/>
                    // ...Some overlays and such
                </Grid>
            </Border>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ListBox>  

Answer 2

Do binding in your Canvas like this. eg, You want to bind to the Width property of the Canvas

    <ListBox>
        <ListBox.ItemTemplate>
            <DataTemplate>
                <Grid>
                    <Canvas Width="{Binding RelativeSource={RelativeSource AncestorType=ListBox},Path=Items}"/>
                </Grid>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>