Question

This seems like such a simple question, but I have been trying for an hour and can’t seem to figure it out.

All I want to do is fill the MainWindow with a Canvas. I couldn’t find any properties to allow this, and the only way I could think of to do it is to set Canvas.Width/Height = MainWindow.Width/Height, but I would have to do that every time the window is resized.

In WinForms docking an element in a parent container was easy.

Answer 1

Just set the Canvas.HorizontalAlignment and VerticalAlignment to “Stretch”. This will cause the Canvas to fill the space available from it’s containing UI element. Just make sure to NOT specify Width/Height explicitly.

In XAML, this is just:

<Window ...Other window props... >
    <Canvas HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
        <!-- Canvas items here... -->
    </Canvas>
</Window>