ToolStripDropDown.OnClosing(ToolStripDropDownClosingEventArgs) ToolStripDropDown.OnClosing(ToolStripDropDownClosingEventArgs) ToolStripDropDown.OnClosing(ToolStripDropDownClosingEventArgs) ToolStripDropDown.OnClosing(ToolStripDropDownClosingEventArgs) Method

定义

引发 Closing 事件。Raises the Closing event.

protected:
 virtual void OnClosing(System::Windows::Forms::ToolStripDropDownClosingEventArgs ^ e);
protected virtual void OnClosing (System.Windows.Forms.ToolStripDropDownClosingEventArgs e);
abstract member OnClosing : System.Windows.Forms.ToolStripDropDownClosingEventArgs -> unit
override this.OnClosing : System.Windows.Forms.ToolStripDropDownClosingEventArgs -> unit
Protected Overridable Sub OnClosing (e As ToolStripDropDownClosingEventArgs)

参数

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.

OnClosing 方法还允许派生类对事件进行处理而不必附加委托。The OnClosing 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 OnClosing(ToolStripDropDownClosingEventArgs) 时,一定要调用基类的 OnClosing(ToolStripDropDownClosingEventArgs) 方法,以便已注册的委托对事件进行接收。When overriding OnClosing(ToolStripDropDownClosingEventArgs) in a derived class, be sure to call the base class's OnClosing(ToolStripDropDownClosingEventArgs) method so that registered delegates receive the event.

安全性

UIPermission
无限制地使用所有窗口和用户输入事件。to use all windows and user input events without restriction. 关联枚举: AllWindows的值UIPermissionWindowAssociated enumeration: the AllWindows value of UIPermissionWindow

适用于