Question

Is there a way to bind an ItemsControl (like ListView or DataGrid) to a sorted collection such that:

• whenever the collection is resorted via code, the ItemsControl automatically reflects the new sort order,
• AND whenever the ItemsControl is sorted, it re-sorts the collection?

Thank you,
Ben

Answer 1

You’ll need to use the

CollectionViewSource.GetDefaultView() 

method to get the default view of your ObservableCollection and apply the sort on that.

For example, below I’m sorting the ObservableCollection named ‘authors’ by BookTitle.

        ObservableCollection<Author> authors = new ObservableCollection<Author>();
        authors = PopulateCollection();

        // Sort by BookTitle
        System.ComponentModel.ICollectionView colView;
        colView = CollectionViewSource.GetDefaultView(authors);
        colView.SortDescriptions.Add(new System.ComponentModel.SortDescription("BookTitle", ListSortDirection.Descending));