public void WriteOsoba(string ime, string prezime, string oib)
        {
            var model = new OsobaModel();
            model.ime = ime;
            model.prezime = prezime;
            model.oib = oib;
            var connectionString = ConfigurationManager.ConnectionStrings["Name"].ConnectionString;
            using (SqlConnection connection = new SqlConnection(connectionString))
            {

                SqlCommand cmd = new SqlCommand("INSERT INTO OSOBA ( ime, prezime, oib) VALUES (  @ime, @prezime, @oib)"); //treba dodati id možda

                /*
                cmd.Parameters.Add("id", SqlDbType.Int);
                cmd.Parameters["id"].Value = model.id ;
                */
                    cmd.Connection = connection;

                    cmd.Parameters.Add("ime", SqlDbType.VarChar);
                    cmd.Parameters["ime"].Value = model.ime;

                    cmd.Parameters.Add("prezime", SqlDbType.VarChar);
                    cmd.Parameters["prezime"].Value = model.prezime;

                    cmd.Parameters.Add("oib", SqlDbType.NVarChar);
                    cmd.Parameters["oib"].Value = model.oib;

                    if (connection.State != ConnectionState.Open)
                    { connection.Open(); }
                    cmd.ExecuteNonQuery();
                    connection.Close();

            }
        }
        //return jedan objekt OsobaModel-a
        public static OsobaModel Read1Osoba(string a)
        {
            var connectionString = ConfigurationManager.ConnectionStrings["Name"].ConnectionString;
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                var model = new OsobaModel();
                DataTable dt = new DataTable();
                SqlDataAdapter adapter = null;
                adapter = new SqlDataAdapter("SELECT * FROM OSOBA WHERE oib = " + a + ";", connection);

                adapter.Fill(dt);

                DataRow row = dt.Rows[0];

                model.id = int.Parse(row[0].ToString());
                model.ime = row[1].ToString();
                model.prezime = row[2].ToString();
                model.oib = row[3].ToString();

                return model;
            }
        }