private void buttonAddCamera_Click(object sender, RoutedEventArgs e)
 {
     if (!NoConnection.IsVisible) //There is a connection
     {
         try
         {
             int    index = comboBoxParkingLot.SelectedIndex + 1;
             string url   = textBoxCameraURL.Text.Trim();
             //Update parking lots camera url
             svm.UpdateCameraURL(index, url);
             RefreshDataASync();
         }
         catch (ArgumentOutOfRangeException ex) { };
     }
 }