绘制有多个孔的多边形？

我正在尝试绘制一个有多个孔的多边形。 我尝试了以下代码，但它无法正常工作。 请指教。

PointF[] mypoly = new PointF[6 + 5 + 5]; mypoly[0] = new PointF(0, 0); mypoly[1] = new PointF(100, 0); mypoly[2] = new PointF(100, 100); mypoly[3] = new PointF(0, 100); mypoly[4] = new PointF(10, 80); mypoly[5] = new PointF(0, 0); mypoly[6] = new PointF(10, 10); mypoly[7] = new PointF(10, 20); mypoly[8] = new PointF(20, 20); mypoly[9] = new PointF(20, 10); mypoly[10] = new PointF(10, 10); mypoly[11] = new PointF(40, 10); mypoly[12] = new PointF(40, 20); mypoly[13] = new PointF(60, 20); mypoly[14] = new PointF(60, 10); mypoly[15] = new PointF(40, 10); g.FillPolygon(new SolidBrush(Color.Red), mypoly, FillMode.Winding); 

第一部分是外部多边形。 第二和第三部分是多边形内的两个孔。

Answer 1

请改用GraphicsPath 。 您可以使用Graphics.FillPath绘制它，如下所示：

 using System.Drawing.Drawing2D; ... using (var gp = new GraphicsPath()) { PointF[] outer = new PointF[] { new PointF(0, 0), new PointF(100, 0), new PointF(100, 100), new PointF(0, 100), new PointF(10, 80),new PointF(0, 0) }; gp.AddPolygon(outer); PointF[] inner1 = new PointF[] { new PointF(10, 10), new PointF(10, 20), new PointF(20, 20), new PointF(20, 10), new PointF(10, 10) }; gp.AddPolygon(inner1); PointF[] inner2 = new PointF[] { new PointF(40, 10), new PointF(40, 20), new PointF(60, 20), new PointF(60, 10), new PointF(40, 10) }; gp.AddPolygon(inner2); e.Graphics.FillPath(Brushes.Black, gp); }