An error occurred during report processing. -RLDC reporting in ASP.NET MVC

Question

I have this action to generate reports :

  public ActionResult Report(string id)
        {
            LocalReport lr = new LocalReport();
            strin         


        

Answer 1

My solution for rdlc is based on ReportViewer.

        byte[] bytes = null;
        string attachmentName = string.Empty;

        Warning[] warnings;
        string[] streamids;
        string mimeType;
        string encoding;
        string extension;
        /*GetReportDataSources(logicResult, spec);*/
        var reportPath = GetReportExecutionPath();

        ReportViewer viewer = new ReportViewer();
        /*viewer.LocalReport.SubreportProcessing +=
            new Microsoft.Reporting.WinForms.SubreportProcessingEventHandler(LocalReport_SubreportProcessing);*/
        viewer.LocalReport.ReportPath = reportPath;
        /*viewer.LocalReport.SetParameters(parameters);*/
        viewer.LocalReport.EnableExternalImages = true;
        viewer.RefreshReport();

        viewer.LocalReport.DisplayName = "displayName";
        bytes = viewer.LocalReport.Render("PDF", null, out mimeType, out encoding, out extension,
            out streamids, out warnings);

/*some logic */

        return new StreamResponse(() =>
        {
            var pdfOutput = new MemoryStream(bytes); 
            pdfOutput.Seek(0, SeekOrigin.Begin);
            return pdfOutput;
        }, "application/pdf").WithHeader("Content-Disposition", "attachment; filename=" + attachmentName);

You need also add report path, and datasources (my solution is complicated, and I use for that LocalReport_SubreportProcessing).

P.S. Using rdlc with ASP.MVC have 1 issue. You need set on ISS App Pool "Identity = LocalSystem", that is ok in Intranet, but not ok in Internet.