silverlight - PagedCollectionView自定义排序

Question

是否可以在Silverlight4中的PagedCollectionView中自定义排序？
在我看来，我有可能按给定的属性对这些集合进行排序。如果要对集合进行升序或降序排序，我也可以设置。但是我看不到设置自定义排序的可能性-使用某种比较器或类似的东西。

可以通过这种方式实现最简单的排序

PlayerPagedCollection = new PagedCollectionView();
PlayerPagedCollection.SortDescriptions.Clear();
PlayerPagedCollection.SortDescriptions.Add(new System.ComponentModel.SortDescription("Name",ListSortDirection.Ascending)); 

是否有可能以某种方式设置自定义排序？我需要使其在Silverlight4上运行

Answer 1

额外的复杂性并不理想，但这对我有用。

public class YourViewModel
{
    private YourDomainContext context;
    private IOrderedEnumerable<Person> people;
    private PagedCollectionView view;
    private PersonComparer personComparer;

    public YourViewModel()
    {
        context = new YourDomainContext();
        personComparer = new PersonComparer()
        {
            Direction = ListSortDirection.Ascending
        };
        people = context.People.OrderBy(p => p, personComparer);
        view = new PagedCollectionView(people);
    }

    public void Sort()
    {
        using (view.DeferRefresh())
        {
            personComparer.Direction = ListSortDirection.Ascending;

            //this triggers the IOrderedEnumerable to resort
            FlightTurnaroundProcessesView.SortDescriptions.Clear();
        }
    }
}

public class PersonComparer : IComparer<Person>
{
    public ListSortDirection Direction { get; set; }

    public int Compare(Person x, Person y)
    {
        //add any custom sorting here
        return x.CompareTo(y) * GetDirection();
    }

    private int GetDirection()
    {
        return Direction == ListSortDirection.Ascending ? 1 : -1;
    }
}