.NET Winform - usercontrol的缩略图

1 回答

• 2

  我不知道在显示之前有办法做到这一点，但是一旦它出现在屏幕上你可以使用这样的方法：

  private Image GetControlThumb(Control control, int thumbSize)
  {
      Bitmap imgLarge = new Bitmap(control.Bounds.Width, control.Bounds.Height);
      using (Graphics g = Graphics.FromImage(imgLarge))
      {
          g.CopyFromScreen(
              control.Parent.PointToScreen(new Point(control.Left, control.Top)),
              new Point(0, 0),
              new Size(control.Bounds.Width, control.Bounds.Height));
      }
  
  
      Size size;
      if (control.Width > control.Height)
      {
          size = new Size(thumbSize, (int)(thumbSize * (float)control.Height / (float)control.Width));
      }
      else
      {
          size = new Size((int)(thumbSize * (float)control.Width / (float)control.Height), thumbSize);
      }
      Image imgSmall = imgLarge.GetThumbnailImage(size.Width, size.Height, new Image.GetThumbnailImageAbort(delegate { return false; }), IntPtr.Zero);
      imgLarge.Dispose();
      return imgSmall;
  
  }
  

  您可以使用它来获取任何控件的缩略图，如下所示：

  myPictureBox.Image = GetControlThumb(someControl, 100);
  

  回复于 2024-04-18T16:33:35+08:00