Working with UICollectionChangedEvent - harborsiem/WindowsRibbon GitHub Wiki

IUICollection Events Objects that implements IUICollection interface usually expose an OnChanged event that is called when the collection has changed due to: Insert item, Remove item, Replace item, Reset collection. This event is exposed using the standard COM events mechanism, namely: IConnectionPointContainer, IConnectionPoint and Advise(). To help the user to avoid these issues altogether, I’ve created the UICollectionChangedEvent class, which attaches to a given IUICollection and exposes the ChangedEvent event as a normal .NET event.

Constructors

Name	Description
UICollectionChangedEvent()	Initializes a new instance of the UICollectionChangedEvent class.

Methods

Name	Description
Attach(IUICollection)	Attach to an IUICollection object events.
Detach()	Detach from the previous IUICollection object events.

Events

Name	Description
ChangedEvent	Occurs when the IUICollection was changed.

In your EventHandler for the ChangedEvent you get the UICollectionChangedEventArgs class.

Properties

Name	Description
Action	Collection change action (Type: enum CollectionChange).
OldIndex	The old index (Type: UInt32).
OldItem	The old item (Type: Object).
NewIndex	The new Index (Type: UInt32).
NewItem	The new Item (Type: Object).

Example: see description of the ComboBox