Control.VisibleChanged Händelse

public:
 event EventHandler ^ VisibleChanged;

public event EventHandler VisibleChanged;

public event EventHandler? VisibleChanged;

member this.VisibleChanged : EventHandler 

Public Custom Event VisibleChanged As EventHandler 

Händelsetyp

Exempel

I följande kodexempel genereras VisibleChanged händelsen när Visible kontrollens egenskapsvärde Label har ändrats.

private:
   void Button_HideLabel( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      myLabel->Visible = false;
   }

   void AddVisibleChangedEventHandler()
   {
      myLabel->VisibleChanged += gcnew EventHandler( this, &MyForm::Label_VisibleChanged );
   }

   void Label_VisibleChanged( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      MessageBox::Show( "Visible change event raised!!!" );
   }

private void Button_HideLabel(object sender, EventArgs e)
{
   myLabel.Visible = false;
}

private void AddVisibleChangedEventHandler()
{
   myLabel.VisibleChanged += new EventHandler(this.Label_VisibleChanged);
}

private void Label_VisibleChanged(object sender, EventArgs e)
{
   MessageBox.Show("Visible change event raised!!!");
}

Private Sub Button_HideLabel(ByVal sender As Object, ByVal e As EventArgs)
   myLabel.Visible = False
End Sub


Private Sub AddVisibleChangedEventHandler()
   AddHandler myLabel.VisibleChanged, AddressOf Label_VisibleChanged
End Sub


Private Sub Label_VisibleChanged(ByVal sender As Object, ByVal e As EventArgs)
   MessageBox.Show("Visible change event raised!!!")
End Sub

Kommentarer

Den här händelsen utlöses om egenskapen Visible ändras genom antingen en programmässig ändring eller användarinteraktion.

Mer information om hur du hanterar händelser finns i Hantera och höja händelser.

Se även

• OnVisibleChanged(EventArgs)
• Visible