动态添加用户控件(usercontrol)

             int aid = Sxmobi.Tools.GetRequestVal("aid", -1);
            Page page = (Page)HttpContext.Current.Handler;
            VP2Admin.UC.AlbumSub ucAS = (VP2Admin.UC.AlbumSub)page.LoadControl("~/uc/AlbumSub.ascx");
            ucAS.albumId = aid;
            PlaceHolder1.Controls.Add(ucAS);