C# RDLC报告未显示数据

我已经阅读了所有我能找到的问题答案，但没有一个解决了我的问题

我有一个代表我的一行数据的类：

public class SimpleGeofenceReportDTO
{
    public string AssetId { get; set; }

    public string CompanyId { get; set; }

    public string SiteId { get; set; }

    public string CategoryId { get; set; }

    public string StartDateTime { get; set; }

    public string EndDateTime { get; set; }

    public string GeofenceId { get; set; }

    public string GeofenceEvent { get; set; }

    public string EventDateTime { get; set; }

}

从Db读取数据并转换为DTO列表：

var reportList = geofenceReport.ToList();
                var report = new List<SimpleGeofenceReportDTO>();
                foreach (var geofenceRecord in reportList)
                {
                    report.Add(new SimpleGeofenceReportDTO()
                                   {
                                       AssetId = geofenceRecord.iAssetId.ToString(),
                                       CategoryId = geofenceRecord.iCategoryId.ToString(),
                                       EndDateTime = geofenceRecord.dtUTCDateTime.ToString("dd/MM/yyyy"),
                                       GeofenceId = geofenceRecord.iGeofenceId.ToString(),
                                       GeofenceEvent = geofenceRecord.eEventCode == 6 ? "Geofence Enter" : "Geofence Exit"

                                   });
                }

ASP.NET网页代码：

 <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server" />


    <div id="ReportContentDiv" runat="server">
        <rsweb:ReportViewer ID="GeofenceSummaryReportViewer" runat="server"
            Font-Names="Verdana" Font-Size="8pt" WaitMessageFont-Names="Verdana"
            WaitMessageFont-Size="14pt" Width="98%" Height="98%">
            <LocalReport ReportPath="TBReports\GeofenceSummaryReport.rdlc">
            </LocalReport>
        </rsweb:ReportViewer>
    </div>
    <div id="ErrorDiv" runat="server">
        <span style="font-family: Arial; font-size: small; font-weight: bold">Your session has expired, Please login again and then try to generate this report.</span>
    </div>
    </form>

您的会话已过期，请重新登录，然后尝试生成此报告。

我已经调试了代码。数据从数据库返回，并且报告Div显示在网页上，但没有数据

---

我做错了什么？

报告的最后一行CS代码：

   var geofenceData = GETLISTOFGEOFENCEDTO();
    GeofenceSummaryReportViewer.ProcessingMode = ProcessingMode.Local;
                        GeofenceSummaryReportViewer.LocalReport.EnableHyperlinks = true;
                        GeofenceSummaryReportViewer.HyperlinkTarget = "_blank";
                        GeofenceSummaryReportViewer.LocalReport.ReportPath = sPath;
     GeofenceSummaryReportViewer.LocalReport.DataSources.Add(
                            new ReportDataSource("GroupGeofenceSummaryReportDataTable", geofenceData ));
      GeofenceSummaryReportViewer.LocalReport.EnableExternalImages = true;
     GeofenceSummaryReportViewer.LocalReport.Refresh();

GeofenceSummaryReportViewer.LocalReport.Refresh();

尝试将其更改为：

GeofenceSummaryReportViewer.RefreshReport();