Form.OnHelpButtonClicked(CancelEventArgs) 方法

定义

引发 HelpButtonClicked 事件。Raises the HelpButtonClicked event.

protected:
 virtual void OnHelpButtonClicked(System::ComponentModel::CancelEventArgs ^ e);
protected virtual void OnHelpButtonClicked (System.ComponentModel.CancelEventArgs e);
abstract member OnHelpButtonClicked : System.ComponentModel.CancelEventArgs -> unit
override this.OnHelpButtonClicked : System.ComponentModel.CancelEventArgs -> unit
Protected Overridable Sub OnHelpButtonClicked (e As CancelEventArgs)

参数

e
CancelEventArgs

包含事件数据的 CancelEventArgsA CancelEventArgs that contains the event data.

注解

引发事件时,将通过委托调用事件处理程序。Raising an event invokes the event handler through a delegate. 有关详细信息,请参阅处理和引发事件For more information, see Handling and Raising Events.

OnHelpButtonClicked 方法还允许派生类对事件进行处理而不必附加委托。The OnHelpButtonClicked method also allows derived classes to handle the event without attaching a delegate. 这是在派生类中处理事件的首选技术。This is the preferred technique for handling the event in a derived class.

继承者说明

在派生类中重写 OnHelpButtonClicked(CancelEventArgs) 时,一定要调用基类的 OnHelpButtonClicked(CancelEventArgs) 方法,以便已注册的委托对事件进行接收。When overriding OnHelpButtonClicked(CancelEventArgs) in a derived class, be sure to call the base class's OnHelpButtonClicked(CancelEventArgs) method so that registered delegates receive the event.

适用于

另请参阅