public FrmDatabaseImportProcess(List<DataImportTable> tableList, DataBase newBase, Connector.SgbdType sgbdType, IConnector conn)
        {
            InitializeComponent();
            Cursor.Current = Cursors.WaitCursor;
            _sgbdType = sgbdType;
            _db = newBase;
            _tableList = tableList;
            _conn = conn;
            foreach (DataImportTable table in tableList)
                table.Count = conn.GetCount(table.Name);
            _columnsCount = tableList.Sum(t => t.Columns.Count);

            launch();
            Cursor.Current = Cursors.Default;
        }