GDI+ 绘制路径渐变图形

通过路径渐变画刷来绘制图片

代码如下：

  private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            GraphicsPath gp = new GraphicsPath();
            Point[] p = new Point[]{
             new Point(10,10),
             new Point(100,30),
             new Point(50,100)
            };
            gp.AddLines(p);
            PathGradientBrush pgb = new PathGradientBrush(gp);
            pgb.CenterColor = Color.White;
            pgb.SurroundColors = new Color[]{
                Color.Black,
                Color.Red,
                Color.Blue
            };
            GraphicsPath gp1 = new GraphicsPath();
            gp1.AddLine(10,10,200,10);
            gp1.AddLine(200, 300, 10, 300);
            pgb.WrapMode = WrapMode.TileFlipY;
       
            g.FillPath(pgb, gp1);
            gp.Dispose();
            pgb.Dispose();
        }