CommandManager.RemovePreviewExecutedHandler 方法

定義

命名空間:

System.Windows.Input

組件:

PresentationCore.dll

將指定的 ExecutedRoutedEventHandler 從指定的項目中斷連結。

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)

參數

element

UIElement

要從其中移除 handler 的項目。

handler

ExecutedRoutedEventHandler

已執行的處理常式。

例外狀況

ArgumentNullException

element 或 handler 為 null。

範例

下列範例會卸CanExecuteRoutedEventHandler離 先前附加至 的 Button和 ExecutedRoutedEventHandler 。

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

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

另請參閱

• RoutedCommand
• ICommand