CommandManager.RemoveCanExecuteHandler 方法

定義

命名空間:
System.Windows.Input
組件:
PresentationCore.dll

將指定的 CanExecuteRoutedEventHandler 元素與指定的元素分離。

public:
 static void RemoveCanExecuteHandler(System::Windows::UIElement ^ element, System::Windows::Input::CanExecuteRoutedEventHandler ^ handler);
public static void RemoveCanExecuteHandler(System.Windows.UIElement element, System.Windows.Input.CanExecuteRoutedEventHandler handler);
static member RemoveCanExecuteHandler : System.Windows.UIElement * System.Windows.Input.CanExecuteRoutedEventHandler -> unit
Public Shared Sub RemoveCanExecuteHandler (element As UIElement, handler As CanExecuteRoutedEventHandler)

參數

element
UIElement

要移除 handler 的元素。

handler
CanExecuteRoutedEventHandler

可以執行處理器。

例外狀況

ArgumentNullException

element 或 handler 為 null。

範例

以下範例將先前連接於 a CanExecuteRoutedEventHandler的 a ExecutedRoutedEventHandler 與 Button an 分離。

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

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

適用於

另請參閱