MoreObservableCollection

MoreObservableCollection.cs

public class MoreObservableCollection<T> : ObservableCollection<T>
    {
        public MoreObservableCollection()
            : base()
        {
            CollectionChanged += new NotifyCollectionChangedEventHandler(ObservableCollection_CollectionChanged);
        }
        
        public MoreObservableCollection(IEnumerable<T> collection)
            : base(collection)
        {
            CollectionChanged += new NotifyCollectionChangedEventHandler(ObservableCollection_CollectionChanged);
        }

        public MoreObservableCollection(List<T> list)
            : base(list)
        {
            CollectionChanged += new NotifyCollectionChangedEventHandler(ObservableCollection_CollectionChanged);
        }

        private void ObservableCollection_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
        {
            if (e.NewItems != null)
            {
                foreach (Object item in e.NewItems.OfType<INotifyPropertyChanged>())
                {
                    (item as INotifyPropertyChanged).PropertyChanged += new PropertyChangedEventHandler(item_PropertyChanged);
                }
            }
            if (e.OldItems != null)
            {
                foreach (Object item in e.OldItems)
                {
                    (item as INotifyPropertyChanged).PropertyChanged -= new PropertyChangedEventHandler(item_PropertyChanged);
                }
            }
        }

        void item_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            NotifyCollectionChangedEventArgs a = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset);
            OnCollectionChanged(a); 
        }
    }