How to Avoid Firing ObservableCollection.CollectionChanged Multiple Times When Replacing All Elements Or Adding a Collection of Elements

Question

I have ObservableCollection collection, and I want to replace all elements with a new collection of elements, I could do:

collection.Cl         


        

Answer 1

ColinE is right with all his informations. I only want to add my subclass of ObservableCollection that I use for this specific case.

public class SmartCollection : ObservableCollection {
    public SmartCollection()
        : base() {
    }

    public SmartCollection(IEnumerable collection)
        : base(collection) {
    }

    public SmartCollection(List list)
        : base(list) {
    }

    public void AddRange(IEnumerable range) {
        foreach (var item in range) {
            Items.Add(item);
        }

        this.OnPropertyChanged(new PropertyChangedEventArgs("Count"));
        this.OnPropertyChanged(new PropertyChangedEventArgs("Item[]"));
        this.OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
    }

    public void Reset(IEnumerable range) {
        this.Items.Clear();

        AddRange(range);
    }
}