#region 把VIEWSTATE以组件的形式存入容器

        protected override void SavePageStateToPersistenceMedium(object viewState)
        {
            base.SavePageStateToPersistenceMedium(viewState);
        }

        protected override object LoadPageStateFromPersistenceMedium()
        {
            object o = new object();
            try
            {
                o = base.LoadPageStateFromPersistenceMedium();
            }
            catch
            {
                o = null;
            }
            return o;
        }

        #endregion