是否可以将XAML ItemSource绑定到Where查询生成的IEnumerable？

Question

I am creating a Windows Phone Application and would like to use Pivots to show different views into the same data.

To do this, I created properties:

IEnumerable<Item> Items { get; set; };
IEnumerable<Item> ItemView1 { get { return Items.where(value => value.Property) }};        
IEnumerable<Item> ItemView2 { get { return Items.where(value => value.Property) }};

And then I bound to them in my view:

<phone:PivotItem>
    <phone:LongListSelector ItemsSource="{Binding ItemView1}">
</phone:PivotItem>

<phone:PivotItem>
    <phone:LongListSelector ItemsSource="{Binding ItemView2}">
</phone:PivotItem>

And after adding items to the Items property, I call:

NotifyPropertyChanged("ItemView1");
NotifyPropertyChanged("ItemView2");

How ever, when I run the application, my view does not get updated with the new results but it works if I create new lists. Is it not possible to bind directly to the result like this? If not, is there any suggested way I should be doing something like this, hopefully without having to build multiple lists all the time?

Answer 1

You're raising the wrong event.

Simple content bound controls, like text blocks, etc., autowire up to INotifyPropertyChanged, if the context object implements that interface, but collection based controls (I think selector based as well) look for INotifyCollectionChanged.