Visibility IValueConverter for ObservableCollection

Question

I'd like to create a visibility converter which displays content if an observablecollection is empty or null. As this converter will be used on many screens, each collection will hold a different type (T).

How do I get a reference to the ObservableCollection of unknown type. This is what I have so far:

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
      if (value == null) return Visibility.Visible;
      if (value is ObservableCollection<object>)
      {
        var col = value as ObservableCollection<object>;
        return col.Count > 0 ? Visibility.Hidden : Visibility.Visible;
      }
      return Binding.DoNothing;
    }

score 8 · Accepted Answer · answered Jul 04 '11 at 04:33

8

You don't have to. Just cast to ICollection and get its Count.

answered Jul 04 '11 at 04:33

Anvaka

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Visibility IValueConverter for ObservableCollection

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