ReportViewerWebWebpart顯示報表時顯示的指令碼錯誤：Uncaught Sys.ArgumentNullException: Sys.ArgumentNullException: 值不

原因可能有三個：

1、ReportService版本太低，所以可以升級Sql Server 2008 R2 SP2. 2、主版頁面中的ScriptManager的屬性加上ScriptMode="Release" 3、在網站的web.config中將設定為<compilation batch="false" debug="false" optimizeCompilations="true">，其主要原因是debug為true的時候會出現這個錯誤。 其中第1、2個可能都不是主要原因，但我在測試的時候由於已經安裝了SP2，所以也不可能把它卸載後再去測試，估且這樣認為吧。 另外附上控制ReportViewerWebPart過濾參數以及控制縮放的方法： 在頁面的後台代碼中加入（或者直接寫到aspx檔案中）：
 

        protected override void OnLoad(EventArgs e)        {            if (!this.IsPostBack)            {                ReportViewerWebPart viewer = FindMainWebpart<ReportViewerWebPart>();                if (viewer != null)                {                    viewer.OverrideParameters.Clear();                    viewer.OverrideParameters.Add(new Microsoft.Reporting.WebForms.ReportParameter("aa", "13,14", false));
                    ReportViewer rptViewer = ReflectorUtils.getField<ReportViewer>("m_reportViewer", viewer);
                    rptViewer.ZoomMode = ZoomMode.PageWidth;

                }            }            base.OnLoad(e);        }        /// <summary>        /// 找到頁面的Webpart        /// </summary>        /// <param name="webPartZoneId">WebpartZone的Id</param>        /// <returns></returns>        protected T FindWebpart<T>(string webPartZoneId) where T : Microsoft.SharePoint.WebPartPages.WebPart        {            #region 已注釋：通過Master找特定WebPartZone的控制項            //1.此種方式只能擷取指定地區的Webpart            //ContentPlaceHolder holder =(ContentPlaceHolder)Master.FindControl("PlaceHolderMain");            //if (holder != null)            //{            //    WebPartZone zone = (WebPartZone)holder.FindControl("Main");            //    foreach (WebPart control in zone.WebParts)            //    {            //        if (control is XsltListViewWebPart)            //        {            //        }            //    }            //}            #endregion            T result = default(T);            SPWebPartManager sPWebPartManager = SPWebPartManagerInPage;            if ((sPWebPartManager.Zones != null) && (sPWebPartManager.Zones.Count > 0))            {                foreach (Microsoft.SharePoint.WebPartPages.WebPartZone zone in sPWebPartManager.Zones)                {                    if (zone.ID == webPartZoneId)                    {                        foreach (Microsoft.SharePoint.WebPartPages.WebPart webpart in zone.WebParts)                        {                            if (webpart is T)                            {                                result = (T)webpart;                                break;                            }                        }                    }                    if (result != null)                    {                        break;                    }                }            }            return result;        }        /// <summary>        ///         /// </summary>        /// <typeparam name="T"></typeparam>        /// <returns></returns>        protected T FindMainWebpart<T>() where T : Microsoft.SharePoint.WebPartPages.WebPart        {            return FindWebpart<T>("Main");        }