Pdf stamping (water mark) functionality is not working in sharepoint 2010

Question

Hi
I have developed custom handler(.dll) for pdf file stamping functionality using Ihttphandler in VS2010 with help of
iTextSharp. deployed the hanlder in GAC and referred hanlder in handler section of the web.config file one of the
Sharepoitin 2010 site. the stamping functionality is working fine when I am using <Mapping Key="pdf" Value="pdf16.gif"
OpenControl = "Malag.OpenDocuments"/> mapping key for PDFs in DOCICON.XML. after doing all this settings when open any pdf
from sharepoint site it opens in the browser with stamping (water mark) on each page of pdf file. Now i want open the file
in Adobe Reader X with check out & check in options. i have changed mapping key for PDFs in DOCICON.XML file to <Mapping
Key="pdf" Value="pdf16.gif" OpenControl = "PdfFile.OpenDocuments"/>. After changing when click on pdf file in site it opens
adobe reader X prompting Chewck out & open etc.. option, if i select Open option the PDF file is not opening & showing
message "There was an error opening this document. File open failed". Please let me know solution how to solve this issue.
Here is my handler code..
using System.IO;
using System.Web;
using Microsoft.SharePoint;
using iTextSharp.text;
using iTextSharp.text.pdf;
using System.Configuration;
using System;
using Microsoft.SharePoint.Administration;
namespace WSPPDFStamping
    class WSPPDFStampingHtppHandler:IHttpHandler
        public bool IsReusable
            get
                return false;
        public void ProcessRequest(HttpContext context)
                    var siteId = SPContext.Current.Site.ID;
                    var sec = new SPSecurity.CodeToRunElevated(delegate()
                                using (var site = new SPSite(siteId))
                                    using (var web = site.OpenWeb())
                                        SPFile file = SPContext.Current.Web.GetFile(context.Request.Url.ToString());
                                        string RequestedURL = context.Request.Url.ToString();
                                       // string connStringUrl = "";
                                        string connStringUrl = "";;
                                        bool isAdd = true;
                                        byte[] content = file.OpenBinary();
                                        SPUser currentUser = SPContext.Current.Web.CurrentUser;
                                        string siteWebAppRoot = "/" + SPContext.Current.Site.WebApplication.DisplayName;
                                        System.Configuration.Configuration rootWebConfig =
                                System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration(siteWebAppRoot);
                                        System.Configuration.ConnectionStringSettings connString;
                                        if (0 < rootWebConfig.ConnectionStrings.ConnectionStrings.Count)
                                            //connString =
                                            //    rootWebConfig.ConnectionStrings.ConnectionStrings["PDFStampingURL"];
                                            //if (null != connString)
                                            //    connStringUrl = connString.ConnectionString.ToString();
                                            for (int i = 0; i < rootWebConfig.ConnectionStrings.ConnectionStrings.Count; i++)
                                                string connStr = "PDFStampingURL" + (i + 1);
                                                connString =
                                                    rootWebConfig.ConnectionStrings.ConnectionStrings[connStr];
                                                if (null != connString)
                                                    connStringUrl = connString.ConnectionString.ToString();
                                                if (RequestedURL.Contains(connStringUrl))
                                                    isAdd = true;
                                                    break;
                                                else
                                                    isAdd = false;
                                        //if (!RequestedURL.Contains(connStringUrl))
                                        if (!isAdd)
                                            context.Response.ContentType = "application/pdf";
                                            context.Response.BinaryWrite(content);
                                           // context.Response.AddHeader("content-disposition", "attachment; filename=" + file.Name);
                                          // context.Response.AddHeader("content-disposition", "inline;filename=" + file.Name);
                                            context.Response.End();
                                            isAdd = false;
                                            return;
                                        string watermark = null;
                                        if (currentUser != null)
                                            watermark = "Document downloaded by " + currentUser.Name + " on " + System.DateTime.Now + " PST.";
                                        if (watermark != null)
                                            PdfReader pdfReader = new PdfReader(content);
                                            using (MemoryStream outputStream = new MemoryStream())
                                                PdfStamper pdfStamper = new PdfStamper(pdfReader, outputStream);
                                                BaseFont baseFont = BaseFont.CreateFont(BaseFont.HELVETICA_BOLD, BaseFont.CP1252, false);
                                                for (int pageIndex = 1; pageIndex <= pdfReader.NumberOfPages; pageIndex++)
                                                    //Rectangle class in iText represent geometric representation...
                                                    //in this case, rectangle object would contain page geometry
                                                  iTextSharp.text.Rectangle pageRectangle = pdfReader.GetPageSizeWithRotation(pageIndex);
                                                    //PdfContentByte object contains graphics and text content of page returned by PdfStamper
                                                    PdfContentByte pdfData = pdfStamper.GetOverContent(pageIndex);
                                                    //create font size for watermark
                                                    pdfData.SetFontAndSize(BaseFont.CreateFont(BaseFont.HELVETICA_BOLD, BaseFont.CP1252, BaseFont.NOT_EMBEDDED), 8);
                                                    //create new graphics state and assign opacity
                                                    PdfGState graphicsState = new PdfGState();
                                                    graphicsState.FillOpacity = 0.7F;//= 0.4F;
                                                    //set graphics state to PdfContentByte
                                                    pdfData.SetGState(graphicsState);
                                                    //indicates start of writing of text
                                                    pdfData.BeginText();
                                                    //show text as per position and rotation
                                                    pdfData.ShowTextAligned(Element.ALIGN_MIDDLE, watermark, pageRectangle.Width / 4, pageRectangle.Height / 44, 0);
                                                    //pdfData.ShowTextAligned(Element.ALIGN_CENTER, "For Internal Use Only", pageRectangle.Width / 2, pageRectangle.Height / 2, 45);
                                                    //call endText to invalid font set
                                                    pdfData.EndText();
                                                    //Top text
                                                    PdfGState graphicsStateTop = new PdfGState();
                                                    graphicsStateTop.FillOpacity = 0.005F;//= 0.4F;
                                                    //set graphics state to PdfContentByte
                                                    pdfData.SetGState(graphicsStateTop);
                                                    pdfData.BeginText();
                                                    //pdfData.ShowTextAlignedKerned(Element.ALIGN_LEFT, "TEXT Left", 150, 628, 0);
                                                    pdfData.ShowTextAligned(Element.ALIGN_CENTER, watermark, pageRectangle.Width / 2, pageRectangle.Height - 13, 0);
                                                    //call endText to invalid font set
                                                    pdfData.EndText();
                                                    //Set 45 degree water mark
                                                    PdfGState graphicsState45 = new PdfGState();
                                                    pdfData.SetFontAndSize(baseFont, 38);
                                                    graphicsState45.FillOpacity = 0.07F;//= 0.4F;
                                                    //set graphics state to PdfContentByte
                                                    pdfData.SetGState(graphicsState45);
                                                    pdfData.BeginText();
                                                    //show text as per position and rotation
                                                    pdfData.ShowTextAligned(Element.ALIGN_CENTER, "Registered For Internal Use Only", pageRectangle.Width / 2, pageRectangle.Height / 2, 45);
                                                    //pdfData.ShowTextAlignedKerned(Element.ALIGN_LEFT, "TEXT Left", 150, 628, 0);
                                                    //call endText to invalid font set
                                                    pdfData.EndText();
                                                pdfStamper.Close();
                                                content = outputStream.ToArray();
                                        context.Response.ContentType = "application/pdf";
                                        context.Response.BinaryWrite(content);
                                       // context.Response.AddHeader("content-disposition", "attachment; filename=" + file.Name);
                                     //   context.Response.AddHeader("content-disposition", "inline;filename=" + file.Name);
                                        context.Response.End();
                    SPSecurity.RunWithElevatedPrivileges(sec);
web.config file of share point site
<handlers>
    <add name="PDFWatermark" verb="*" path="*.pdf" preCondition="integratedMode"
type="WSPPDFStamping.WSPPDFStampingHtppHandler, WSPPDFStamping, Version=1.0.0.0, Culture=neutral,
PublicKeyToken=835cc3a26d74a89a" />
    </handlers>
thanks in advance.
jampani venkateshwar rao.

Answer 1

Time to engage in basic debugging. Alter your script to remove all the extra steps and generate logs as it goes along, then gradually re-enable each part so you can work out where it's bombing out. It doesn't sound like a problem with Reader itself, and as Claudio says we're not here to provide support for non-Adobe software.