CODEWITHSUNDEEP
wpf
Gerard
Gerard

Reputation: 13417

Binding Canvas.Size to parent UserControl and then setting Canvas.Size in code

I have a wpf Canvas in a grid in a UserControl named 'root' and I bind the Width and Height of the canvas as follows:

Width="{Binding ElementName=root, Path=ActualWidth}"
Height="{Binding ElementName=root, Path=ActualHeight}"

On the canvas all kinds of DrawingVisual are drawn. In code behind I set the Width end Height of my Canvas equal to ContentBounds.Right and ContentBounds.Bottom so that every DrawingVisual that I add to the canvas will be visible.

This seems to work all right but I am confused about the binding mentioned.
This is a one-way binding from the usercontrol's actual size to the size of the canvas.

Does the setting of Width and Height in code behind overrule this binding?

When I remove the binding the canvas is displayed equally as well, but the control is also used in other places and situations and might be needed then.

Upvotes: 0

Views: 502

Answers (1)

mm8
mm8

Reputation: 169400

Does the setting of Width and Height in code behind overrule this binding?

Yes. Programmatically setting the value of a target property that has a one-way binding applied to it will clear the binding.

Upvotes: 1

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