How do I convert a WPF size to physical pixels?

Question

What\'s the best way to convert a WPF (resolution-independent) width and height to physical screen pixels?

I\'m showing WPF content in a WinForms Form (via ElementHo

Answer 1

Simple proportion between Screen.WorkingArea and SystemParameters.WorkArea:

private double PointsToPixels (double wpfPoints, LengthDirection direction)
{
    if (direction == LengthDirection.Horizontal)
    {
        return wpfPoints * Screen.PrimaryScreen.WorkingArea.Width / SystemParameters.WorkArea.Width;
    }
    else
    {
        return wpfPoints * Screen.PrimaryScreen.WorkingArea.Height / SystemParameters.WorkArea.Height;
    }
}

private double PixelsToPoints(int pixels, LengthDirection direction)
{
    if (direction == LengthDirection.Horizontal)
    {
        return pixels * SystemParameters.WorkArea.Width / Screen.PrimaryScreen.WorkingArea.Width;
    }
    else
    {
        return pixels * SystemParameters.WorkArea.Height / Screen.PrimaryScreen.WorkingArea.Height;
    }
}

public enum LengthDirection
{
    Vertical, // |
    Horizontal // ——
}

This works fine with multiple monitors as well.