BitmapImage转换器(StringToImageSourceConverter)

    public static class Utils
    {
        public static BitmapImage GetImage(string filename)
        {
            string imgLocation = Application.Current.Resources["ImagesLocation"].ToString();

            StreamResourceInfo imageResource = Application.GetResourceStream(new Uri(imgLocation + filename, UriKind.Relative));
            BitmapImage image = new BitmapImage();
            image.SetSource(imageResource.Stream);

            return image;
       }
　　 }