Control.OnMouseDown(MouseEventArgs) Method


引发 MouseDown 事件。Raises the MouseDown event.

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



一个包含事件数据的 MouseEventArgsA MouseEventArgs that contains the event data.


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.

OnMouseDown 方法还允许派生类对事件进行处理而不必附加委托。The OnMouseDown 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.

Notes to Inheritors

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

Applies to

See also