BindingSource не привязывается к Dataset?

            conn = new SqlConnection();
            conn.ConnectionString = "Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Shop";
            conn.Open();
            SqlCommand myCommand = conn.CreateCommand();
            myCommand.CommandText = "SELECT ID_BOOK, BOOKNAME_BOOK, NAME_AUTHOR, NAME_GENRE, NAME_PUBLISH, PHOTO_BOOK, ANNOTATION_BOOK,YEAR_BOOK, PAGES_COUNT, PRICE FROM BOOK, AUTHOR, GENRE, PUBLISH WHERE ID_AUTHOR = ID_AUTHOR_BOOK AND ID_GENRE = ID_GENRE_BOOK AND ID_PUBLISH = ID_PUBLISH_BOOK";
            SqlDataAdapter dataAdapter = new SqlDataAdapter();
            dataAdapter.SelectCommand = myCommand;
            ds = new DataSet();
            dataAdapter.Fill(ds, "BOOK");
            dgvBook.DataSource = ds.Tables["BOOK"].DefaultView;

           bs = new BindingSource();
            bs.DataSource = ds;
            bs.DataMember = "BOOK";
            
            conn.Close();

            if (choice == 0) //Фильтрация
            {
                DataView dvSearch = new DataView(main.ds.Tables["BOOK"]);
                dvSearch.RowFilter = filter;
                main.bs.DataSource = dvSearch;
            }
            else // Поиск
            {
                DataRow[] result = main.ds.Tables["BOOK"].Select(filter);
                main.bs.Position = main.bs.Find("ID_BOOK", result[i].ItemArray[0]);     
                i++;
                if (i >= result.Length)
                    i = 0;
            }