private void deleteFeedback_Click(object sender, RoutedEventArgs e)
{
if (feedback.Count != 0 && feedbackIdx != -1)
{
SQLQuery mSQLQuery = new SQLQuery();
int id = feedback.ElementAt(feedbackIdx).Item1.Item1;
mSQLQuery.deleteParentFeedback(id);
parentNameLabel.Content = "";
feedbackText.Text = "";
feedback.Remove(feedback.ElementAt(feedbackIdx));
feedbackIdx--;
}
}