private void FillPeripheralsTable(int configId) { var peripherals = ConfigurationDAL.GetPeripheralsByConfigId(configId); List <Tuple <string, string, string, string> > peripheralList = new List <Tuple <string, string, string, string> >(); foreach (var peripheral in peripherals) { peripheralList.Add(new Tuple <string, string, string, string>(peripheral.id.ToString(), peripheral.name, peripheral.type, peripheral.producer)); } PeripheralGridView.DataSource = peripheralList; PeripheralGridView.DataBind(); }