Winform中GDI+绘图(椭圆,直线等)

用 CreateGraphics 方法创建 Graphics 对象

Graphics g = this.CreateGraphics();  

画线,下例是一个棋盘:

            //x+=15每一个格子的宽15,y+=15每一个格子的高15  
            for (int x = 10, y = 10, count = 0; count < 15; x += 15, y += 15, count++)  
            {  
                //220=15*14+10(格子宽*14+期盼最左的线起始x坐标)  
                g.DrawLine(new Pen(Color.Blue), new Point(10, y), new Point(220, y));  
                g.DrawLine(new Pen(Color.Blue), new Point(x, 10), new Point(x, 220));  
  
            }

画椭圆:

g.FillEllipse(Brushes.Black,rtg);

  

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