I​Vector​Changed​Event​Args I​Vector​Changed​Event​Args I​Vector​Changed​Event​Args Interface


Provides data for the changed event of a vector.

public : interface IVectorChangedEventArgspublic interface IVectorChangedEventArgsPublic Interface IVectorChangedEventArgs
Windows 10 requirements
Device family
Windows 10 (introduced v10.0.10240.0)
API contract
Windows.Foundation.FoundationContract (introduced v1)


IVectorChangedEventArgs is specifically used for the VectorChanged event of the IObservableVector; interface, via the VectorChangedEventHandler delegate.

.NET developers can get instances of this interface via handling the VectorChanged event from an IObservableVector instance. Even though the remainder of the collection support for IObservableVector uses language projections that change IVector; APIs to IList<T> APIs, the VectorChanged event, its delegates and its event data aren't changed by the projection and so "Vector" (as opposed to "List") remains in the API names.


CollectionChange CollectionChange CollectionChange

Gets the type of change that occurred in the vector.

public : CollectionChange CollectionChange { get; }public CollectionChange CollectionChange { get; }Public ReadOnly Property CollectionChange As CollectionChange
CollectionChange CollectionChange CollectionChange

The type of change in the vector.


Index Index Index

Gets the position where the change occurred in the vector.

public : unsigned short Index { get; }public uint Index { get; }Public ReadOnly Property Index As uint
unsigned short uint uint

The zero-based position where the change occurred in the vector, if applicable.