GDI+画图问题，请高手指点

Question

你没有画呀，你的Draw函数最后加个g.DrawPath(Pens.Black, roundedRect);

Answer 1

private void Draw(Graphics g, Rectangle rect)
{
    GraphicsPath roundedRect = new GraphicsPath();
    roundedRect.AddArc(rect.X, rect.Y, rect.Width, rect.Height, 0, 360);
    roundedRect.CloseFigure();
    Region pathRegion = new Region(roundedRect);
    g.FillRegion(new SolidBrush(Color.Yellow), pathRegion);
}