CS文件:
   private string _dispnum = ""; //定义显示条数
    public string dispnum
    {
        get
        {
            return _dispnum;
        }
        set
        {
            _dispnum = value;
        }
    }

ASPX文件:
< uc1:flyso id="Flyso1" runat="server" dispnum="30"></uc1:flyso>