private void en_cours_Click(object sender, RoutedEventArgs e)
        {
            lister_location u = new lister_location();

            this.g.Children.Clear();
            g.Children.Add(u);
            u.type.Content = "en cours";
        }
        private void depasse_Click(object sender, RoutedEventArgs e)
        {
            lister_location u = new lister_location();

            this.g.Children.Clear();
            g.Children.Add(u);
            u.type.Content = "dépassé";
        }