GDI+基础知识——画笔的对齐方式

效果：



 
代码：
  private void Pen_Align_Click(object sender, System.EventArgs e)
  {
   Graphics graphics = this.CreateGraphics();
   graphics.Clear(Color.White);
   graphics.SmoothingMode = SmoothingMode.HighQuality;
   
   Pen pen = new Pen(Color.Gray, 1.0f);
   Pen pen1  =  new Pen(Color.FromArgb(255,Color.Green),12);
   Pen pen2 = new Pen(Color.FromArgb(155,Color.Red),20);
   
   for(int i = 0; i<5;i++)
   {
    pen1.Alignment = (PenAlignment)i;
    for(int j = 0;j<5;j++)
    {
     pen2.Alignment = (PenAlignment)j;
     graphics.TranslateTransform(20,0);
     //graphics.DrawLine(pen2, new Point(0,30), new Point(60,30));
     //graphics.DrawLine(pen1, new Point(0,30), new Point(60,30));
     graphics.DrawEllipse(pen1,0,30,80,80);
     graphics.DrawEllipse(pen2,0,30,80,80);
     graphics.DrawString("绿色:"+pen1.Alignment.ToString() + "\n红色:" + pen2.Alignment.ToString(),new Font("Arial",12,FontStyle.Bold),new SolidBrush(Color.Yellow),0f,30f);
     graphics.DrawString("绿色:"+pen1.Alignment.ToString() + "\n红色:" + pen2.Alignment.ToString(),new Font("Arial",12),new SolidBrush(Color.Black),0f,30f);
     graphics.TranslateTransform(110,0);
    }
    graphics.ResetTransform();
    graphics.TranslateTransform(0,100*(i+1));
   }
  
   graphics.ResetTransform();
   //graphics.DrawLine(pen,0,30,600,30);
   graphics.Dispose();
  }