本来是想好好学习趁毕设好好学习下JAVA的，但是我JAVA真心不熟，为了开发速度，还是搓搓地选择了用VS2008+C# 了，说实话，这个比java稍微熟一些，但是还是不够熟练，需要好好锻炼自己的代码能力。
纠结了好久的画图代码，原来是因为画点画的太快的缘故，屏幕来不及刷新，必须要用缓存技术。以下为OK代码，就贴下：
public static void Draw_point(PointF point, Color c) { Graphics g = Graphics.FromImage(image); g.FillEllipse(new SolidBrush(c), (float)(point.X - point_size / 2.0), (float)(point.Y - point_size / 2.0), (float)point_size, (float)point_size); g.DrawString(nodeCount.ToString(), new Font("宋体", 9f), new SolidBrush(c), (float)(point.X - point_size / 2.0), (float)(point.Y - point_size / 2.0 + 5)); nodeCount++; g.Flush(System.Drawing.Drawing2D.FlushIntention.Sync); g.Dispose(); graphics.DrawImage(image, 0, 0); graphics.Flush(System.Drawing.Drawing2D.FlushIntention.Sync); }
public static void Draw_text(PointF point, string txt, Color c) { Graphics g = Graphics.FromImage(image); g.DrawString(txt, new Font("宋体", 9f), new SolidBrush(c), (float)(point.X - point_size / 2.0), (float)(point.Y - point_size / 2.0 + 10)); g.Flush(System.Drawing.Drawing2D.FlushIntention.Sync); g.Dispose(); graphics.DrawImage(image, 0, 0); graphics.Flush(System.Drawing.Drawing2D.FlushIntention.Sync); } public static void Draw_line(PointF A, PointF B, Color c,int width) { Graphics g = Graphics.FromImage(image); g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; g.Flush(System.Drawing.Drawing2D.FlushIntention.Sync); g.DrawLine(new Pen(c, width), A.X, A.Y, B.X, B.Y); g.Dispose(); graphics.Flush(System.Drawing.Drawing2D.FlushIntention.Sync); graphics.DrawImage(image, 0, 0); }