Dock a Canvas in its parent

Question

How can I "dock" a canvas in its parent?

I have a UserControl that contains a canvas inside.

<UserControl x:Class="MyUC"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         mc:Ignorable="d"              
         d:DesignHeight="300" d:DesignWidth="300">
    <MyCanvas x:Name="myCanvas" 
        Height="???" 
        Width="???{Binding RelativeSource={RelativeSource TemplatedParent}}" >
    </MyCanvas>
</UserControl>

I use Width and Height properties of this custom canvas inside. And need that that properties be always "bind" to the parent Container.

Answer 1

Try this

Width="{Binding RelativeSource={RelativeSource FindAncestor, 
                                               AncestorType=UserControl, 
                                               AncestorLevel=1},
                Path=ActualWidth}"

Same goes for height