Returns the default view for the given source.
Assembly: PresentationFramework (in PresentationFramework.dll)
- Type: System.Object
An object reference to the binding source.
This default view is never affiliated with any CollectionViewSource objects.
All collections have a default CollectionView. WPF always binds to a view rather than a collection. If you bind directly to a collection, WPF actually binds to the default view for that collection. This default view is shared by all bindings to the collection, which causes all direct bindings to the collection to share the sort, filter, group, and current item characteristics of the one default view. Alternatively, you can create a view of your collection in Extensible Application Markup Language (XAML) or code using the CollectionViewSource class, and binding your control to that view. For an example, see How to: Sort and Group Data Using a View in XAML.
Views allow the same data collection to be viewed in different ways, depending on sorting, filtering, or grouping criteria. Every collection has one shared default view, which is used as the actual binding source when a binding specifies a collection as its source. This example shows how to get the default view of a collection.
To create the view, you need an object reference to the collection. This data object can be obtained by referencing your own code-behind object, by getting the data context, by getting a property of the data source, or by getting a property of the binding. This example shows how to get the DataContext of a data object and use it to directly obtain the default collection view for this collection.
Alternatively, you can instantiate and bind to your own collection view using the CollectionViewSource class. This collection view is only shared by controls that bind to it directly. For an example, see the How to Create a View section in the Data Binding Overview.
For examples of the functionality provided by a collection view, see How to: Sort Data in a View, How to: Filter Data in a View, and How to: Navigate Through the Objects in a Data CollectionView.
|How to: Sort and Group Data Using a View in XAML||This example shows how to create a view of a data collection in Extensible Application Markup Language (XAML). Views allow for the functionalities of grouping, sorting, filtering, and the notion of a current item.|