怎么在回发操作中更新ascx值..

new void DataBind()
        {
            switch (Convert.ToByte(ViewState["mestype"]))
            {
            case 0: PaObj.DataSource = new SQLserverDAL.buysellDAL().Items(Convert.ToInt32(Session["userid"]), 2, 0); break;
             ......
            default:break;
            }

            this.Page1.Recordcount = PaObj.Count;

            PaObj.AllowPaging=true;
            PaObj.PageSize=new led.manage().Web_PageSize();
            if (page <= 0)
                page = 1;
            if (page > PaObj.PageCount)
                page = PaObj.PageCount;
            PaObj.CurrentPageIndex = page - 1;
            this.message.DataSource=PaObj;
            this.message.DataBind();

            this.Page1.Currpage = page;
            this.Page1.Pagesize = PaObj.PageSize;
        }

        protected void OnClick_Mestype(object sender, CommandEventArgs e) {
            ViewState["mestype"] = Convert.ToByte();
            DataBind();
        }