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

C# version 7 supports pattern matching. Now you can write:

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
    switch (value)
    {
        case null:
            return Visibility.Collapsed;
        case ICollection list:
            return list.Count == 0 ? Visibility.Collapsed : Visibility.Visible;
    }

    return Visibility.Visible;
}