WeakEventManager::ProtectedRemoveListener Method (Object^, IWeakEventListener^)

 

Removes a previously added listener from the provided source.

Namespace:   System.Windows
Assembly:  WindowsBase (in WindowsBase.dll)

protected:
void ProtectedRemoveListener(
	Object^ source,
	IWeakEventListener^ listener
)

Parameters

source
Type: System::Object^

The source to remove listeners from.

listener
Type: System.Windows::IWeakEventListener^

The listening class (which must implement IWeakEventListener).

Call this method within your manager class RemoveListener methods on WeakEventManager implementations. RemoveListener is the suggested name for the static method you define on your manager class to enable other classes to remove a listener for your weak event pattern. RemoveListener should take two parameters: the source where the listener is removed, and the listener class. For your RemoveListener implementation, call the ProtectedRemoveListener method on the current manager and pass the same two parameters.

If a call to ProtectedRemoveListener removes the last listener in the list, ProtectedRemoveListener calls the StopListening method internally, which will call your specific StopListening override through polymorphism.

ProtectedRemoveListener removes listeners from a single internal WeakEventManager::ListenerList per source. If your manager implementation maintains more than one list of listeners for each event-source combination, do not use ProtectedRemoveListener. Instead, your implementation should create its own WeakEventManager::ListenerList instances, RemoveListener should remove listeners from the appropriate list, and events should be delivered to the appropriate listener list by calling the DeliverEventToList method instead of the DeliverEvent method.

.NET Framework
Available since 3.0
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