public ShowRepairers(int urzadzenie_id)
        {
            InitializeComponent();
            using (MainDB.InzynierkaDBEntities db = new MainDB.InzynierkaDBEntities())
            {
                string query = "SELECT s.imie+' '+s.nazwisko AS 'Serwisanci' FROM Serwisant s " +
                               "INNER JOIN GrupaNaprawcza gn ON gn.serwisant_id = s.serwisant_id " +
                               "WHERE gn.urzadzenie_id = " + urzadzenie_id + ";";

                DataTable dt = SQL.DoQuery(query);

                List <string> list = new List <string>();
                foreach (DataRow dr in dt.Rows)
                {
                    list.Add(dr[0].ToString());
                }

                lboxRepairers.DataSource = list;
            }
        }
        private void GetDataFromDB()
        {
            List <string> allrepairers;

            using (MainDB.InzynierkaDBEntities db = new MainDB.InzynierkaDBEntities())
            {
                allrepairers = db.Serwisant.Select(x => x.imie + " " + x.nazwisko).ToList();
            }

            foreach (string a in allrepairers)
            {
                lbToChoose.Items.Add(a);
            }
            lbToChoose.Update();

            foreach (string a in lbChosen.Items)
            {
                lbToChoose.Items.Remove(a);
            }
            lbToChoose.Update();
        }