ToolStripControlHost.OnSubscribeControlEvents(Control) Method

Reference

Definition

Namespace:: System.Windows.Forms

Assembly:: System.Windows.Forms.dll

Source:: ToolStripControlHost.cs

Source:: ToolStripControlHost.cs

Source:: ToolStripControlHost.cs

Important

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Subscribes events from the hosted control.

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)

Parameters

control: Control

The control from which to subscribe events.

Examples

The following code example demonstrates how to set up event handling for an event exposed by the hosted control. This code example is part of a larger example provided for the ToolStripControlHost class.

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

Remarks

Override the OnSubscribeControlEvents method to add or prevent the synchronizing of control events.

If you override and hook up events here, unhook them by using the OnUnsubscribeControlEvents method.

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

The OnSubscribeControlEvents method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors

When overriding OnSubscribeControlEvents(Control) in a derived class, be sure to call the base class's OnSubscribeControlEvents(Control) method so that registered delegates receive the event.

Applies to

Dela via