动态绘制任务栏图标C#的实现

 /// <summary>
 /// 动态设置任务栏图标
 /// </summary>
 /// <param name="number"></param>
 public void SetTaskIconDynamic(string number)
 {     
     //动态绘制图标样式
     Size size = this.Icon.Size;
     Bitmap cursorBitmap = new Bitmap(size.Width, size.Height);
     Graphics graphics = Graphics.FromImage(cursorBitmap);
     graphics.Clear(Color.FromArgb(0, 0, 0, 0));
     graphics.ResetClip();
     Rectangle rect = new Rectangle(0, 0, size.Width, size.Height);

     //Gdi+自定义绘制图标
     graphics.DrawImage(this.Icon.ToBitmap(), rect);
     graphics.FillEllipse(new SolidBrush(Color.FromArgb(244,107,10)), new Rectangle(rect.Width / 2 - 2, rect.Height / 2 - 2, rect.Width / 2, rect.Height / 2));
     graphics.DrawString(number, this.Font, Brushes.White, new Rectangle(rect.Width / 2 - 2, rect.Height / 2 - 2, rect.Width / 2, rect.Height / 2), new StringFormat()
      {
          LineAlignment = StringAlignment.Center,
          Alignment = StringAlignment.Center
      });

      //生成Icon
      Icon cursor = Icon.FromHandle(cursorBitmap.GetHicon());
      graphics.Dispose();
      cursorBitmap.Dispose();

      //更新任务栏图标样式
      this.Icon = cursor;
 }