Binding to element in WPF: can the Path expression do math?

Question

I\'m trying to bind a control to the parent\'s Height/width property using ElementName and a Path. However, I don\'t want to bind to the actual height, but to exact

Answer 1

I use a MathConverter to do math in my XAML bindings.The converter code can be found here and it is used like this:

Height="{Binding ElementName=RootWindow, Path=ActualHeight,
                 Converter={StaticResource MathConverter},
                 ConverterParameter=@VALUE/2}"

It will also handle more advanced math equations like

Height="{Binding ElementName=RootWindow, Path=ActualHeight,
                Converter={StaticResource MathConverter},
                ConverterParameter=((@VALUE-200)*.3)}"