public ActionResult AmbulancePersonSignReport(string startTime, string endTime)
        {
            SS s= new SS();
            List<Ale> list = s.GetInfo(startTime, endTime);

            var ReportPath = Server.MapPath("/RDLC/AmbulancePersonSign.rdlc");

            var localReport = new Microsoft.Reporting.WebForms.LocalReport { ReportPath = ReportPath };

            Microsoft.Reporting.WebForms.ReportParameter pStartTime = new Microsoft.Reporting.WebForms.ReportParameter("StartTime", startTime);
            Microsoft.Reporting.WebForms.ReportParameter pEndTime = new Microsoft.Reporting.WebForms.ReportParameter("EndTime", endTime);
            localReport.SetParameters(new Microsoft.Reporting.WebForms.ReportParameter[] { pStartTime, pEndTime });

            var reportDataSource = new Microsoft.Reporting.WebForms.ReportDataSource("AmbulancePersonSignInfo", list);
            localReport.DataSources.Add(reportDataSource);

            string mimeType;
            string encoding;
            string fileNameExtension;
            string reportType = "pdf";

            string deviceInfo =
                "<DeviceInfo>" +
                "  <OutputFormat>" + reportType + "</OutputFormat>" +
                "  <PageWidth>8.5in</PageWidth>" +
                "  <PageHeight>11in</PageHeight>" +
                "  <MarginTop>0.5in</MarginTop>" +
                "  <MarginLeft>1in</MarginLeft>" +
                "  <MarginRight>1in</MarginRight>" +
                "  <MarginBottom>0.5in</MarginBottom>" +
                "</DeviceInfo>";

            Warning[] warnings;
            string[] streams;
            byte[] renderedBytes;

            renderedBytes = localReport.Render(
                reportType,
                deviceInfo,
                out mimeType,
                out encoding,
                out fileNameExtension,
                out streams,
                out warnings); (这段代码总报错：“本地报表处理期间出错”)           
            return File(renderedBytes, mimeType);
        }