ToolStripControlHost.OnSubscribeControlEvents(Control) 方法

protected:
 virtual void OnSubscribeControlEvents(System::Windows::Forms::Control ^ control);

protected virtual void OnSubscribeControlEvents(System.Windows.Forms.Control control);

protected virtual void OnSubscribeControlEvents(System.Windows.Forms.Control? control);

abstract member OnSubscribeControlEvents : System.Windows.Forms.Control -> unit
override this.OnSubscribeControlEvents : System.Windows.Forms.Control -> unit

Protected Overridable Sub OnSubscribeControlEvents (control As Control)

參數

範例

以下程式碼範例示範如何為託管控制所暴露的事件設定事件處理。 此程式碼範例是本類別更大範例 ToolStripControlHost 的一部分。

void OnSubscribeControlEvents( System::Windows::Forms::Control^ c )
{
   // Call the base so the base events are connected.
   __super::OnSubscribeControlEvents( c );
   
   // Cast the control to a MonthCalendar control.
   MonthCalendar^ monthCalendarControl = (MonthCalendar^)c;
   
   // Add the event.
   monthCalendarControl->DateChanged += gcnew DateRangeEventHandler( this, &ToolStripMonthCalendar::HandleDateChanged );
}

protected override void OnSubscribeControlEvents(Control c)
{
    // Call the base so the base events are connected.
    base.OnSubscribeControlEvents(c);

    // Cast the control to a MonthCalendar control.
    MonthCalendar monthCalendarControl = (MonthCalendar) c;

    // Add the event.
    monthCalendarControl.DateChanged +=
        new DateRangeEventHandler(OnDateChanged);
}

Protected Overrides Sub OnSubscribeControlEvents(ByVal c As Control) 

    ' Call the base so the base events are connected.
    MyBase.OnSubscribeControlEvents(c)
    
    ' Cast the control to a MonthCalendar control.
    Dim monthCalendarControl As MonthCalendar = _
        CType(c, MonthCalendar)

    ' Add the event.
    AddHandler monthCalendarControl.DateChanged, _
        AddressOf HandleDateChanged

End Sub

備註

覆寫新增 OnSubscribeControlEvents 或阻止控制事件同步的方法。

如果你在這邊覆寫並連接事件，請用這個 OnUnsubscribeControlEvents 方法解除掛鉤。

發起事件會透過代理呼叫事件處理者。 欲了解更多資訊，請參閱 處理與提升事件。

此 OnSubscribeControlEvents 方法也允許衍生類別在不附加代理的情況下處理事件。 這是在衍生類別中處理事件的首選技術。

給繼承者的注意事項

在導出類別中覆寫 OnSubscribeControlEvents(Control) 時，務必呼叫基底類別的方法 OnSubscribeControlEvents(Control) ，讓註冊代理接收事件。