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Leadtools.Annotations.Core Namespace > Classes > AnnObservableCollection<T> > Events > CollectionChanged Event
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CollectionChanged Event (AnnObservableCollection<T>)
Summary
Occurs when the collection changes.
Syntax
public event EventHandler<AnnNotifyCollectionChangedEventArgs> CollectionChangedPublic Event CollectionChanged As EventHandler(Of AnnNotifyCollectionChangedEventArgs)public event EventHandler<AnnNotifyCollectionChangedEventArgs> CollectionChangedpublic void addCollectionChangedListener(AnnNotifyCollectionChangedListener listener)public void removeCollectionChangedListener(AnnNotifyCollectionChangedListener listener)
add_CollectionChanged(function(sender, e))remove_CollectionChanged(function(sender, e))
Event Data
The event handler receives an argument of type AnnNotifyCollectionChangedEventArgs containing data related to this event. The following AnnNotifyCollectionChangedEventArgs properties provide information specific to this event.
| Property | Description |
|---|---|
| Action | Gets the action that caused the event. |
| NewItems | Gets the list of new items involved in the change. |
| NewStartingIndex | Gets the index at which the change occurred. |
| OldItems | Gets the list of items affected by a Replace, Remove, or Move action. |
| OldStartingIndex | Gets the index at which a Move, Remove, or Replace action occurred. |
Requirements
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© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.
Leadtools.Annotations.Core Assembly
