Control.OnMouseDown(MouseEventArgs) Control.OnMouseDown(MouseEventArgs) Control.OnMouseDown(MouseEventArgs) Control.OnMouseDown(MouseEventArgs) Method

定義

引發 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)

參數

e
MouseEventArgs MouseEventArgs MouseEventArgs MouseEventArgs

MouseEventArgs,其中包含事件資料。A MouseEventArgs that contains the event data.

備註

引發事件會透過委派叫用此事件處理常式。Raising an event invokes the event handler through a delegate. 如需詳細資訊, 請參閱處理和引發事件For more information, see Handling and Raising Events.

OnMouseDown 方法也允許衍生類別處理事件,而不用附加委派。The OnMouseDown method also allows derived classes to handle the event without attaching a delegate. 這是在衍生類別中處理事件的慣用技巧。This is the preferred technique for handling the event in a derived class.

給繼承者的注意事項

當在衍生類別中覆寫 OnMouseDown(MouseEventArgs) 時,請確定呼叫基底類別的 OnMouseDown(MouseEventArgs) 方法,使已註冊的委派能接收到事件。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.

適用於

另請參閱