C# 画点画线写字

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);

}

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