public void BindData()
    {
      string OleDbStmt = "SELECT * FROM bd";
     conString =new OleDbConnection( "Provider=Microsoft.Jet.OLEDB.4.0; Data Source="+Server.MapPath(".")+"..\\ip.mdb;");
      OleDbDataAdapter sda = new OleDbDataAdapter(OleDbStmt, conString);
      sda.Fill(ds,"bd");
     DataList1.DataSource =ds.Tables["bd"].DefaultView;
   datalist1.databind();//这句少了,你的子控件也没绑定这句
    }