急，求助，数据绑定问题

  private void Page_Load(object sender, System.EventArgs e)
       {
           string cons="Provider=Mricrosoft.Jet.OLEDB.4.0;Data Source=bookstore.MDB";
           string sqls="select * from book";// 在此处放置用户代码以初始化页面
           OleDbConnection con=new OleDbConnection(cons);
           con.Open();
           OleDbDataAdapter dap=new OleDbDataAdapter(sqls,con);
           OleDbCommand cmd =new OleDbCommand(sqls);
           cmd.ExecuteNonQuery();
           DataSet ds=new DataSet();
          dap.Fill(ds,"book");
    this.TextBox1.DataBinding.Add (new DataBinding("Text" , ds , "book.book_name"));
       }
系统提示问题是：  this.TextBox1.DataBinding.Add (new DataBinding("Text" , ds , "book.book_name"));这句语句有错．