在 vs2008，用 C# 画多条直线时卡 - 编程论坛

C#语言，在pictureBox控件中画直线时，数量少画得很快，当数量为100条时执行时间明显长了很多，卡一下才显示所画的100条直线。请大家帮看一下要怎么优化才执行快些？代码如下：

程序代码：

        Point[] pt;
        Point p1, p2;
        List<Point[]> pts = new List<Point[]>();
        public void InitData()
        {
            int x1, y1, x2, y2;
            for (int r = 0; r <101; r++)
            {
                x1 = 0;
                y1 = r * 32;
                x2 = 101* 32;
                y2 = r * 32;
                p1 = new Point(x1,y1);
                p2 = new Point(x2,y2);
                pt = new Point[2];
                pt[0] = p1;
                pt[1] = p2;
                pts.Add(pt);

            }
        }
       //调用画图方法
        public void myDraw()
        {
            Bitmap bmp = new Bitmap(100*32, 100*32);
            Graphics g = Graphics.FromImage(bmp);
            Pen pen = new Pen(Color.White, 1);
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
            pen.DashStyle = System.Drawing.Drawing2D.DashStyle.DashDot;
            foreach (Point[] po in pts)
            {
                g.DrawLine(pen, po[0], po[1]);
            }
            pictureBox1.Image = bmp;
            pen.Dispose();
            g.Dispose();
        }