WeakEventManager.ListenerList.Add Method

Adds a listener item to the WeakEventManager.ListenerList.

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

public void Add(
	IWeakEventListener listener
)
You cannot use methods in XAML.

Parameters

listener
Type: System.Windows.IWeakEventListener

The listener element to add to the WeakEventManager.ListenerList.

The object provided as listener should be a DependencyObject that implements the IWeakEventListener interface and therefore has a working ReceiveWeakEvent implementation.

You should always call PrepareForWriting before changing the list contents. Otherwise, the list may be in process of delivering events and therefore the original is locked. Calling PrepareForWriting changes the input list to be a clone so that your Add call can still work on the clone. If PrepareForWriting returns true, you might need to update any private references to the list that you maintain in other areas of your code.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0
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