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| Leadtools.Annotations.Core Namespace > IAnnNotifyCollectionChanged Interface : CollectionChanged Event |
event EventHandler<AnnNotifyCollectionChangedEventArgs> CollectionChanged
'Declaration
Event CollectionChanged As EventHandler(Of AnnNotifyCollectionChangedEventArgs)
event EventHandler<AnnNotifyCollectionChangedEventArgs> CollectionChanged
void addCollectionChangedListener(AnnNotifyCollectionChangedListener listener); void removeCollectionChangedListener(AnnNotifyCollectionChangedListener listener);
add_CollectionChanged(function(sender, e)) remove_CollectionChanged(function(sender, e))
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. |