What are the differences between CollectionViewSource, ICollectionView, ListCollectionView, IList and BindingListCollectionView? When and where to use all these collections? I know the main use of ...

I've been investigating how to avoid memory leaks caused by strong references to the INotifyCollectionChanged event from a view model. I was playing around with using a ListCollectionView to see if...

I'm creating a WPF TimeCard app using the MVVM design pattern, and I'm trying to display the sum (total) hours the user has clocked in grouped by each day. I have a ListView with all of the TimeCar...

I have a ViewModel containing a ListCollectionView property, and a View containing a ListView control whose ItemsSource property is data bound to the ListCollectionView: ViewModel: public ListCo...

I have a database with 10,000 items, to which you can add and remove while the app is running. I have a ListBox that displays at most 100 items, and supports paging. You can filter and sort on th...

How does ListCollectionView.AddNew determine the type of object it creates, and how could one affect it? I have a hierarchy of a few types (Base, DerivedA, and DerivedB), and currently my WPF Tool...

<!-- GroupHeaderStyle --> <Style x:Key="GroupHeaderStyle" TargetType="{x:Type GroupItem}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:...

none of these seem to do the trick: var source = myViewModel.MyListCollectionView.Select(x => x as MyType); var source = myViewModel.MyListCollectionView.Select<object, MyType>(x => x ...

I'm using the MVVM design pattern, with a ListView bound to a ListCollectionView on the ViewModel. I also have several comboboxes that are used to filter the ListView. When the user selects an item...

I'm trying to bind a text box to the count of a filtered, collection view in XAML. It doesn't generate any errors but it also doesn't produce any output. Does anyone know how to do this? Here's ar...