Question

我想从32x32,16x16位图以编程方式创建一个System.Drawing.Icon。这可能吗？如果我用 -

加载图标

Icon myIcon = new Icon(@"C:\myIcon.ico");

...它可以包含多个图像。

Answer 1

.ico 文件可以包含多个图像，但是当您加载.ico文件并创建一个Icon对象时，只会加载其中一个图像。 Windows根据当前显示模式和系统设置选择最合适的图像，并使用该图像初始化System.Drawing.Icon对象，忽略其他对象。

因此，您无法创建包含多个图片的System.Drawing.Icon，您必须在创建Icon对象之前选择一个。

当然，可以在运行时从位图创建一个Icon，这是你真正要问的吗？或者您是否在询问如何创建.ico文件？

Answer 2

有一个很好的code snippet here。它使用Icon.FromHandle方法。

从链接：

/// <summary>
/// Converts an image into an icon.
/// </summary>
/// <param name="img">The image that shall become an icon</param>
/// <param name="size">The width and height of the icon. Standard
/// sizes are 16x16, 32x32, 48x48, 64x64.</param>
/// <param name="keepAspectRatio">Whether the image should be squashed into a
/// square or whether whitespace should be put around it.</param>
/// <returns>An icon!!</returns>
private Icon MakeIcon(Image img, int size, bool keepAspectRatio) {
  Bitmap square = new Bitmap(size, size); // create new bitmap
  Graphics g = Graphics.FromImage(square); // allow drawing to it

  int x, y, w, h; // dimensions for new image

  if(!keepAspectRatio || img.Height == img.Width) {
    // just fill the square
    x = y = 0; // set x and y to 0
    w = h = size; // set width and height to size
  } else {
    // work out the aspect ratio
    float r = (float)img.Width / (float)img.Height;

    // set dimensions accordingly to fit inside size^2 square
    if(r > 1) { // w is bigger, so divide h by r
      w = size;
      h = (int)((float)size / r);
      x = 0; y = (size - h) / 2; // center the image
    } else { // h is bigger, so multiply w by r
      w = (int)((float)size * r);
      h = size;
      y = 0; x = (size - w) / 2; // center the image
    }
  }

  // make the image shrink nicely by using HighQualityBicubic mode
  g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
  g.DrawImage(img, x, y, w, h); // draw image with specified dimensions
  g.Flush(); // make sure all drawing operations complete before we get the icon

  // following line would work directly on any image, but then
  // it wouldn't look as nice.
  return Icon.FromHandle(square.GetHicon());
}

Answer 3

您可以尝试使用png2ico创建.ico文件，使用System.Diagnostics.Process.Start调用它。在调用png2ico之前，您需要创建图像并将其保存到光盘。

如何创建具有多个大小/图像的System.Drawing.Icon？

3 个答案: