Update Page( windows) during Button Click, Spinner stops working on WPF C#

Question

I’m making a WPF application in c#, that when I click the query button on the bank. It starts spinning a "Spinner" that is inside the Usercontrol;

 private void BtnBusca_Click(object sender, RoutedEventArgs e)
 {
    MessageControl.Visibility = Visibility.Visible;
    Dispatcher.Invoke(new Action(() => { }), DispatcherPriority.ContextIdle, null);
    FuncaoBuscabanco(TbCampoBusca.Text);
    MessageControl.Visibility = Visibility.Collapsed;
}

By clicking the Button, it will not stop running and continue to do my search in the database.