ASP.NET

<p>
    @Html.ActionLink("Create New", "Create", new { claimId = ViewBag.claimId })
    @Html.ActionLink("PDF Print", "PhotoBook", new { claimId = ViewBag.claimId }, new { target = "_blank" })
</p>

public ActionResult PhotoBook(int claimId, int? defectId, int? propertyId, int? locationId, int? categoryId)
        {
            var observations = db.Observations.Where(o => o.claimId == claimId);

            if (defectId != null)
                observations = observations.Where(o => o.defectId == defectId);

            if (categoryId != null)
            {
                ViewBag.defectId = new SelectList(db.Defects.Where(d => d.categoryId == categoryId), "id", "displayId", defectId == null ? null : db.Defects.Where(d => d.id == defectId));
                observations = observations.Where(o => o.Defect.categoryId == categoryId);
            }
            else
            {
                ViewBag.defectId = new SelectList(db.Defects, "id", "displayId", defectId == null ? null : db.Defects.Where(d => d.id == defectId).FirstOrDefault());
            }

            if (propertyId != null)
                observations = observations.Where(o => o.propertyId == propertyId);

            if (locationId != null)
                observations = observations.Where(o => o.locationId == locationId);

            return RedirectToAction("Index", "Report", new { observations = observations });
        }

public void IndexAsync(IEnumerable<Observation> observations)
        {
            AsyncManager.OutstandingOperations.Increment();
            photoBook myReport = new photoBook();
            myReport.DataSource = observations;
            string fileName = "Photobook " + DateTime.Now.ToString("yyyyMMddHHmm") + ".pdf";
            AsyncManager.Parameters["fileName"] = fileName;

            ReportProcessor myProcessor = new ReportProcessor();
            RenderingResult result = myProcessor.RenderReport("PDF", myReport, null);

            FileStream fs = new FileStream(Server.MapPath("~/Reports/" + fileName), FileMode.Create);
            fs.Write(result.DocumentBytes, 0, result.DocumentBytes.Length);
            fs.Flush();
            fs.Close();
            myReport.Dispose();
            fs.Dispose();
            AsyncManager.OutstandingOperations.Decrement();
        }

public ViewResult IndexCompleted(string fileName)
{
    ViewBag.fileName = fileName;
    return View();
}