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CollectionView.Count Property

Gets the number of records in the view.

Namespace:  System.Windows.Data
Assembly:  PresentationFramework (in PresentationFramework.dll)

public virtual int Count { get; }

Property Value

Type: System.Int32
The number of records in the view, or –1 if the number of records is unknown.

If a filter is set, this property value only includes items that pass the filter. If the underlying collection is of type IEnumerable, this is an O(N) operation. This value is cached until the collection changes.

Notes to Inheritors

When deriving from CollectionView, override this property to provide a more efficient implementation.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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