silverlight GridView的SelectedItems绑定处理

在gridview中的属性中只有SelectedItem而没有SelectedItems，但是我需要为SelectedItems绑定数据进行操作，该如何去做呢？

我们还可以看到SelectedItems只能读，不能写，又该如何处理呢？

如下是我的解决方式：

写一个behavior重写这个SelectedItems，

 

public class GridViewSelectedItemsBehavior : Behavior<RadGridView>
    {
        public INotifyCollectionChanged SelectedItems
        {
            get { return (INotifyCollectionChanged)GetValue(SelectedItemsProperty); }
            set { SetValue(SelectedItemsProperty,value); }
        }

        public static readonly DependencyProperty SelectedItemsProperty = DependencyProperty.Register("SelectedItems",typeof(INotifyCollectionChanged),typeof(GridViewSelectedItemsBehavior),new PropertyMetadata(OnSelectedItemsPropertyChanged));

        private RadGridView GridView
        {
            get
            {
                return Associatedobject as RadGridView;
            }
        }

        private static void OnSelectedItemsPropertyChanged(DependencyObject d,DependencyPropertyChangedEventArgs e)
        {
            GridViewSelectedItemsBehavior behavior = (GridViewSelectedItemsBehavior)d;
            var collection = e.NewValue as INotifyCollectionChanged;
            if (collection != null)
            {
                behavior.UnsubscribeFromEvents();
                behavior.Transfer(behavior.SelectedItems as IList,behavior.GridView.SelectedItems);
                behavior.SubscribetoEvents();
            }
        }

        protected override void OnAttached()
        {
            base.OnAttached();

            GridView.SelectedItems.CollectionChanged += GridViewSelectedItems_CollectionChanged;
        }

        private void GridViewSelectedItems_CollectionChanged(object sender,NotifyCollectionChangedEventArgs e)
        {
            UnsubscribeFromEvents();
            Transfer(GridView.SelectedItems,SelectedItems as IList);
            SubscribetoEvents();
        }

        public void Transfer(IList source,IList target)
        {
            if (source == null || target == null)
                return;

            target.Clear();

            foreach (var o in source)
            {
                target.Add(o);
            }
        }

        private void SubscribetoEvents()
        {
            GridView.SelectedItems.CollectionChanged += GridViewSelectedItems_CollectionChanged;
        }

        private void UnsubscribeFromEvents()
        {
            GridView.SelectedItems.CollectionChanged -= GridViewSelectedItems_CollectionChanged;
        }
    }

 界面调用：

<telerik:RadGridView Grid.Row="1">

 <i:Interaction.Behaviors>
                    <plm:GridViewSelectedItemsBehavior SelectedItems="{Binding MyList}" />
</i:Interaction.Behaviors>

</telerik:RadGridView》