private void ButtonSave_Click(object sender, RoutedEventArgs e)
        {
            bool allgood = true;

            if (TextSurname.Text == "")
            {
                TextSurname.BorderBrush = Brushes.Red; allgood = false;
            }
            if (TextPhone.Text == "")
            {
                TextPhone.BorderBrush = Brushes.Red; allgood = false;
            }
            if (ComboBoxSlots.SelectedItem == null)
            {
                ComboBoxSlots.BorderBrush = Brushes.Red; allgood = false;
            }
            if (!allgood)
            {
                return;
            }


            string[] reservation = new string[7];
            reservation[0] = TextName.Text;
            reservation[1] = TextSurname.Text;
            reservation[2] = ComboBoxRoom.Text;
            reservation[3] = ComboBoxSlots.Text;
            reservation[4] = TextPhone.Text;
            reservation[5] = loggedUserID.ToString();
            reservation[6] = date.Date.ToString("yyyy-MM-dd");

            Database sql = new Database();

            sql.addReservation(reservation);

            w2.getReservations();

            this.Close();
        }