Control.OnMouseDown(MouseEventArgs) 方法

定义

命名空间:
System.Windows.Forms
程序集:
System.Windows.Forms.dll

引发 MouseDown 事件。Raises the MouseDown event.

protected:
 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)

参数

e
MouseEventArgs

包含事件数据的 MouseEventArgs。A MouseEventArgs 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.

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.

继承者说明

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.

适用于

另请参阅