private static ImageSource GetFileIcon(string fileName)
{
// if file does not exist, create a temp file with the same file extension
var isTemp = false;
if (!File.Exists(fileName) && !Directory.Exists(fileName))
{
isTemp = true;
fileName = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + Path.GetExtension(fileName));
File.WriteAllText(fileName, string.Empty);
}
var shinfo = new Natives.SHFILEINFO();
var flags = Natives.SHGFI_SYSICONINDEX;
if (fileName.IndexOf(":", StringComparison.Ordinal) == -1)
{
flags = flags | Natives.SHGFI_USEFILEATTRIBUTES;
}
flags = flags | Natives.SHGFI_ICON | Natives.SHGFI_SMALLICON;
Natives.SHGetFileInfo(fileName, 0, ref shinfo, (uint)Marshal.SizeOf(shinfo), flags);
var icon = Icon.FromHandle(shinfo.hIcon);
var bitmap = icon.ToBitmap();
var hBitmap = bitmap.GetHbitmap();
try
{
return(Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions()));
}
finally
{
Natives.DeleteObject(hBitmap);
if (isTemp)
{
File.Delete(fileName);
}
}
}
