c# GDI+简单绘图
en 来画虚线,带箭头的直线等Pen p = new Pen(Color.Blue, 5);//设置笔的粗细为,颜色为蓝色Graphics g = this.CreateGraphics();//画虚线p.DashStyle = DashStyle.Dot;//定义虚线的样式为点g.DrawLine(p, 10, 10, 200, 10);//自定义虚线p.DashPattern = new float[] { 2, 1 };//设置短划线和空白部分的数组g.DrawLine(p, 10, 20, 200, 20);//画箭头,只对不封闭曲线有用p.DashStyle = DashS