Reportviewer重新排序数据集？

Question

我将实体框架数据集传递给RDLC，输出不是我期望的顺序。下面是我的代码，我希望输出按CarName列排序，但不按该顺序呈现。我错过了什么？

               BF_Model db = new BF_Model();

           IQueryable<vwAllExportLog> dsEDIReports_EF_vwAllExportLog;

           dsEDIReports_EF_vwAllExportLog = from c in db.vwAllExportLog
                                            let mydate2 = new DateTime(2014, 7, 17)
                                            where c.Production == true
                                                    && c.RunDate >= mydate2
                                            orderby c.CarName, c.CltName, c.RunDate
                                            select c;

           //provide local report information to viewer
           reportViewer1.Reset();
           reportViewer1.LocalReport.ReportPath = @"D:\Development\EDIReports_EF\EDIReports_EF\Reports\ExportsGroupedByCarrier.rdlc";
           reportViewer1.LocalReport.DataSources.Clear();

           reportViewer1.LocalReport.DataSources.Add(new ReportDataSource("dsEDIReports_EF_vwAllExportLog", dsEDIReports_EF_vwAllExportLog));

           reportViewer1.LocalReport.Refresh();

           //load report viewer
           reportViewer1.RefreshReport();