CollectionViewSource does not re-sort on property change

Question

I'm binding ItemsControl to CollectionViewSource. Here is code:

this.Trucks = new ObservableCollection<Truck>();
            foreach (var truck in DataRepository.Trucks.Where(t => t.ReadyDate.Date.Equals(this.Date)))
            {
                this.Trucks.Add(truck);
            }

            this.TrucksSource = new CollectionViewSource { Source = this.Trucks };
            this.TrucksSource.SortDescriptions.Add(new SortDescription("ReadyAddress.Region.RegionNumber", ListSortDirection.Ascending));
            this.TrucksSource.SortDescriptions.Add(new SortDescription("TruckId", ListSortDirection.Ascending));

When I initially bind - sorting works. When I add item to ObservableCollection - it is inserted in proper spot, thats good. But when I change property which I sort by - this item is not being "shifted" in a list.

ReadyAddress.Region.RegionNumber properly raises INotifyPropertyChanged and I see it in bound fields, but order does not change. Do I expect something that shouldn't happen or there is better way to handle this?

Answer 1

Late answer, but with 4.5 the ListCollectionView (the default implementation for a ListBox and CollectionViewSource.View) new properties were added to make this possible.

You can use the IsListSorting and ListSortingProperties to enable automatic resorting. And no, it does not rebuild the view

list.SortDescriptions.Add(new SortDescription("MyProperty", ListSortDirection.Ascending));
list.IsLiveSorting = true;
list.LiveSortingProperties.Add("MyProperty");

This should resort when the property MyProperty changes.