PresentationSource.RemoveSourceChangedHandler Method

Definition

Namespace:

System.Windows

Assembly:

PresentationCore.dll

Removes a handler for the SourceChanged event from the provided element.

public:
 static void RemoveSourceChangedHandler(System::Windows::IInputElement ^ e, System::Windows::SourceChangedEventHandler ^ handler);

public static void RemoveSourceChangedHandler (System.Windows.IInputElement e, System.Windows.SourceChangedEventHandler handler);

static member RemoveSourceChangedHandler : System.Windows.IInputElement * System.Windows.SourceChangedEventHandler -> unit

Public Shared Sub RemoveSourceChangedHandler (e As IInputElement, handler As SourceChangedEventHandler)

Parameters

e

IInputElement

The element to remove the handler from.

handler

SourceChangedEventHandler

The handler implementation to remove.

Remarks

Even though this is a routed event, there are special restrictions placed on this event that differ from normal routed event behavior, due to the relatively small number of elements in a typical application scenario that would concern themselves with handling this event.

• You cannot use the UIElement or ContentElement RemoveHandler methods to remove handlers. You must use RemoveSourceChangedHandler.

• The C# += and -= event handler syntaxes, and other language-specific handler syntaxes, are not supported, because the event itself is not exposed as public. Only the PresentationSource utility methods for adding and removing the handlers directly are supported.

See also

• AddSourceChangedHandler(IInputElement, SourceChangedEventHandler)