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WPFの画像相互コンバーター。System.Drawing.BitmapからSystem.Windows.Controls.Imageへの変換。

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WPFで画像を扱おうとしたら、とても種類が多いことがわかったので、相互コンバーターを作ることにした。
まず最初は定番のSystem.Drawing.BitmapからSystem.Windows.Controls.Imageへの変換。

    [System.Runtime.InteropServices.DllImport("gdi32.dll")]
    public static extern bool DeleteObject(IntPtr hObject);
    public static System.Windows.Controls.Image
        SystemDrawingBitmap2SystemWindowsControlsImage(System.Drawing.Bitmap original) {

        IntPtr hBitmap = original.GetHbitmap();
        var newimage = new System.Windows.Controls.Image();
        try {
            newimage.Source = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                hBitmap,
                IntPtr.Zero,
                Int32Rect.Empty,
                System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
        }
        finally {
            DeleteObject(hBitmap);
        }
        return newimage;
    }
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