有没有应用RIA Services SP1的DomainCollectionView的MVVM示例？

[xhtmldivcss]

What is the DomainCollectionView?

The DomainCollectionView (herein referred to as the DCV) is a collection view implementation. The generic version of the class implements all the following interfaces. Most controls are designed to recognize and work against these interfaces.

◤ ICollectionView
◤ IEditableCollectionView
◤ IPagedCollectionView
◤ IEnumerable
◤ IEnumerable<T>
◤ INotifyPropertyChanged
◤ INotifyCollectionChanged

……

[jv9]

这里有一套中文的教程可以参考：

http://www.silverlightchina.net/html/tips/2011/0503/7343.html
http://www.silverlightchina.net/html/tips/2011/0504/7360.html
http://www.silverlightchina.net/html/tips/2011/0504/7362.html
http://www.silverlightchina.net/html/tips/2011/0504/7363.html
http://www.silverlightchina.net/html/tips/2011/0504/7396.html
http://www.silverlightchina.net/html/tips/2011/0505/7405.html

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public class ProductsViewModel
{
    private NorthwindDomainContext _Context = new NorthwindDomainContext();

    private EntityList<Product> _source;
    private DomainCollectionViewLoader _loader;
    private DomainCollectionView _view;

    public ProductsViewModel()
    {
        _source = new EntityList<Product>(_Context.Products);
        _loader = new DomainCollectionViewLoader<Product>(LoadProducts, OnLoadProductsCompleted);
        _view = new DomainCollectionView(_loader, _source);

        INotifyCollectionChanged notifySortDescriptions = (INotifyCollectionChanged)CollectionView.SortDescriptions;
        notifySortDescriptions.CollectionChanged += (s, e) => this._view.MoveToFirstPage();

        if (!DesignerProperties.IsInDesignTool)
        {
            using (this.CollectionView.DeferRefresh())
            {
                this._view.PageSize = 15;
                this._view.MoveToFirstPage();
            }
        }

    }
    // ProductEntitySet只用于测试
    public EntitySet<Product> ProductEntitySet
    {
        get { return this._Context.Products; }
    }

    public ICollectionView CollectionView
    { 
        get
        {
            return this._view;
        }
    }
    LoadOperation<Product> LoadProducts()
    {
        var query = _Context.GetProductsQuery();
        return _Context.Load(query.SortAndPageBy(this._view));
    }
    void OnLoadProductsCompleted(LoadOperation<Product> lo)
    {
        if (lo.HasError)
        {
            lo.MarkErrorAsHandled();
            MessageBox.Show(lo.Error.Message);
        }
        else if (!lo.IsCanceled)
        {
            this._source.Source = lo.Entities;

            if (lo.TotalEntityCount != -1)
            {
                this._view.SetTotalItemCount(lo.TotalEntityCount);
            }
                
        }
    }

}

<sdk:DataGrid  ItemsSource="{Binding CollectionView}" Margin="12,12,0,0" Name="productDataGrid" ……>
<sdk:DataPager Source="{Binding CollectionView}" Name="dataPager1" PageSize="10" />

另外一个DataGrid绑定到EntitySet<Product>，翻页的过程中可以看出因为EntityList<Product>的因故，虽然看起来Silverlight只显示当前页，实际上DomainContext一直在累加数据。