EmptyListToVisibilityConverter

Question

I\'m trying to do an \"empty list to visibility converter\" for WPF. This is an IValueConverter that takes an object ( that should be a list ) and if the list is empty (or i

Answer 1

I think its quite straight forward, here you go:

  public class NullOrEmptyCollectionToVisibilityConverter : IValueConverter
  {
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
      if (value == null) return Visibility.Collapsed;

      var collection = value as ICollection;
      return collection != null ? (collection.Count == 0 ? Visibility.Collapsed : Visibility.Visible) : Visibility.Visible;
    }

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

Hoping wil help, thanks! - Shams