在Paint事件中，WPF与Windows Forms Region.Xor等效吗？

Question

I'm trying to move this WinForms code to WPF, but there is no Paint event.

private void OnPaint(object sender, PaintEventArgs e)
{
    var region = new Region(new Rectangle(0, 0, this.Width, this.Height));
    var rectangle = new Rectangle(0, 0, 50, 50);
    region.Xor(rectangle);
    e.Graphics.FillRegion(Brushes.Black, region);
}

Answer 1

WPF doesn't work like WinForms in terms of graphics. You can't actually draw shapes, you have to place them into your content.

Geometry should serve as a good replacement for Region . You can use Geometry.Combine and specify GeometryCombineMode.Xor to replicate your drawing code.

RectangleGeometry is how you make rectangles. There are similar classes for other shapes.

To actually display the Geometry , put it in a Path , which can be used as a control's content.