在图片上画直线比画框更简单。线形的控制还是通过对Pen的设置来实现的。 /**////
/// 在图片上画线 /// ///
原始图 ///
起始点 ///
终止点 ///
线的颜色 ///
线宽 ///
线条样式 ///
输出图
public static Bitmap DrawLineInPicture(Bitmap bmp, Point p0, Point p1, Color LineColor, int LineWidth, DashStyle ds) ...{ if (bmp == null) return null; if (p0.X == p1.X || p0.Y == p1.Y) return bmp; Graphics g = Graphics.FromImage(bmp); Brush brush = new SolidBrush(LineColor); Pen pen = new Pen(brush, LineWidth); //pen.Alignment = PenAlignment.Inset; pen.DashStyle = ds; g.DrawLine(pen,p0,p1); g.Dispose(); return bmp; } 本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/ki1381/archive/2007/08/16/1746255.aspx