public class PathConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            string name = value.ToString();
            BitmapImage result = null;
            if (!string.IsNullOrWhiteSpace(name))
            {
                result = new BitmapImage(new Uri(string.Format("../images/{0}.png", name), UriKind.Relative));
            }
            return result;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }