CommandManager.RemovePreviewExecutedHandler 方法

定义

命名空间:

System.Windows.Input

程序集:

PresentationCore.dll

从指定的元素分离指定的 ExecutedRoutedEventHandler。

public:
 static void RemovePreviewExecutedHandler(System::Windows::UIElement ^ element, System::Windows::Input::ExecutedRoutedEventHandler ^ handler);

public static void RemovePreviewExecutedHandler (System.Windows.UIElement element, System.Windows.Input.ExecutedRoutedEventHandler handler);

static member RemovePreviewExecutedHandler : System.Windows.UIElement * System.Windows.Input.ExecutedRoutedEventHandler -> unit

Public Shared Sub RemovePreviewExecutedHandler (element As UIElement, handler As ExecutedRoutedEventHandler)

参数

element

UIElement

要从中移除 handler 的元素。

handler

ExecutedRoutedEventHandler

执行的处理程序。

例外

ArgumentNullException

element 或 handler 为 null。

示例

以下示例分离CanExecuteRoutedEventHandler之前已附加到 的 和 ExecutedRoutedEventHandler 。Button

CommandManager.RemoveExecutedHandler(helpButton, HelpCmdExecuted);
CommandManager.RemoveCanExecuteHandler(helpButton, HelpCmdCanExecute);

CommandManager.RemoveExecutedHandler(helpButton, AddressOf HelpCmdExecuted)
CommandManager.RemoveCanExecuteHandler(helpButton, AddressOf HelpCmdCanExecute)

另请参阅

• RoutedCommand
• ICommand