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IMapChangedEventArgs<K> Interface

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Definition

Namespace:
Windows.Foundation.Collections
Edit

Provides data for the changed event of a map collection.

public interface class IMapChangedEventArgs
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.FoundationContract, 65536)]
/// [Windows.Foundation.Metadata.Guid(2570712287, 1290, 19471, 170, 96, 119, 7, 95, 156, 71, 119)]
template <typename K>
struct IMapChangedEventArgs
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.FoundationContract), 65536)]
[Windows.Foundation.Metadata.Guid(2570712287, 1290, 19471, 170, 96, 119, 7, 95, 156, 71, 119)]
public interface IMapChangedEventArgs<K>
Public Interface IMapChangedEventArgs(Of K)

Type Parameters

K
Attributes
ContractVersionAttribute GuidAttribute

Windows requirements

Device family
Windows 10 (introduced in 10.0.10240.0)
API contract
Windows.Foundation.FoundationContract (introduced in v1.0)

Remarks

IMapChangedEventArgs<K> is specifically used for the MapChanged event of the IObservableMap<K,V> interface, via the MapChangedEventHandler<K,V> delegate. It's also used for PropertySet.MapChanged.

.NET developers can get instances of this interface via handling the PropertySet.MapChanged event or the MapChanged event from an IObservableMap instance. Even though the remainder of the collection support for IObservableMap or PropertySet uses language projections that change IMap<K,V> APIs to IDictionary<TKey,TValue> APIs, the MapChanged event, its delegates and its event data aren't changed by the projection and so "Map" (as opposed to "Dictionary") remains in the API names.

Properties

CollectionChange

Gets the type of change that occurred in the map.
Key

Gets the key of the item that changed.

Applies to

See also