Data Binding with WPF and MVVM/Model-View-ViewModel

Question

I'm having difficulty correctly Data Binding my models in the view. I have a MainWindowViewModel which contains a list of AlbumViewModels. Each AlbumViewModel holds an AlbumModel. So I have multiple albums and I need to display information in an ObservableCollection in the AlbumModel. I have two ListBoxes. ListBox1 holds the list of AlbumViewModels that are in my MainWindowViewModel. My second ListBox I want to display the ObservableCollection from the current selected item from the AlbumViewModel.AlbumModel. How can I do this? I've tried binding the DataContext of ListBox2 to the ListBox1 element, along with SelectedItem as the path but that returns 'AlbumViewModel'. Is there anyway to bind ItemsSource of a ListBox to the binding of the DataContext, but in this case binding it to [DataContext].AlbumModel.ObservableCollection or something?

I apologise if it sounds rather complicated!

Anvaka · Accepted Answer · 2010-02-25 14:58:19Z

0

You can use the fact, that when you bind to a collection, WPF wraps collection to CollectionView. And this guy has CurrentItem.. Bea had good article: How can I sync selection of two data bound ListBoxes? and Dr.WPF is amazing (as usual): ItemsControl: 'C' is for Collection.

edited Feb 25, 2010 at 14:58

answered Feb 25, 2010 at 14:34

Anvaka

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Harry Over a year ago

Ah ok, that's interesting. Thanks. It's worked but now I'm trying to figure out how to display my Model. Obviously I don't want the View to have access to the Model, so how can I create a DateTemplate for it without exposing the Model? edit: Nevermind. it's working. I just created a DataTemplate with a key rather than a DataType :) Thanks muchly!

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