如何将系统对象转换为图像?

它可能是图像、ipicture或ipicturedisp的COM接口。可以使用axhost.getPictureFromIPicture或getPictureFromIPictureDisp静态方法进行转换。

最后我写了一个小包装类,这对我很有用:

stdole.IPictureDisp iPictureDisp = row.Parent.Thumbnail;
pictureBox1.Image = IconTools.GetImage(iPictureDisp);

正如汉斯所提到的,您将要使用axhost。但实施起来比我最初想象的要复杂一些。请注意,您将要使用 AxHost.GetPictureFromIPicture 而不是 GetPictureFromIPictureDisp .

关于 AxHost.GetPictureFromIPictureDisp:

此方法无法正常工作。你可以使用 从图片获取图片 方法来转换 IPICTISDISP 但是,由于 IPICTISDISP 对象链接和嵌入 接口是 意指 接口。

这是包装纸:

public class IconTools
{
    private class IconToolsAxHost : System.Windows.Forms.AxHost
    {
        private IconToolsAxHost() : base(string.Empty) { }

        public static stdole.IPictureDisp GetIPictureDispFromImage(System.Drawing.Image image)
        {
            return (stdole.IPictureDisp)GetIPictureDispFromPicture(image);
        }

        public static System.Drawing.Image GetImageFromIPicture(object iPicture)
        {
            return GetPictureFromIPicture(iPicture);
        }
    }

    public static stdole.IPictureDisp GetIPictureDisp(System.Drawing.Image image)
    {
        return IconToolsAxHost.GetIPictureDispFromImage(image);
    }

    public static System.Drawing.Image GetImage(stdole.IPicture iPicture)
    {
        return IconToolsAxHost.GetImageFromIPicture(iPicture);
    }

    public static System.Drawing.Image GetImage(stdole.IPictureDisp iPictureDisp)
    {
        return IconToolsAxHost.GetImageFromIPicture(iPictureDisp);
    }
}