Execute process on production web server

Question

This is my code for printing an already generated PDF on website. The page allows the user to print that PDF file by selecting a printer from a list.

My code works fine when I run it from my local machine and the PDF is printed out from the selected printer, but when I deploy it to production web server (IIS 7) nothing happens when clicking on Print button and no exceptions or errors were raised.

I've checked that the file exists in the server as well as the executable C:\\Program Files\\Adobe\\Reader 10.0\\Reader\\AcroRd32.exe, so I thought the issue could be related to permissions.

Checks performed in server:

1. All Users, System and IIS_IUSRS users has R/W/E permissions on ~/Content/Pdfs/ folder
2. All Users, System and IIS_IUSRS users has R/W/E permissions on C:\Program Files\Adobe\Reader 10.0\Reader folder.

3. Identity of my Application Pool on IIS was changed from ApplicationPoolIdentity to LocalSystem.

   private void Print(string file, string printerName)
   {                      
       string FilePath = Server.MapPath("~/Content/Pdfs/" + file);
   
       try
       {
           Process p = new Process();
           p.StartInfo.FileName = @"C:/Program Files/Adobe/Reader 10.0/Reader/AcroRd32.exe";
           p.StartInfo.Arguments = "/h /t \"" + FilePath + "\" \"" + printerName + "\"";
           p.StartInfo.RedirectStandardError = true;
           p.StartInfo.UseShellExecute = false;                
           p.Start();
           string stdout = p.StandardError.ReadToEnd();
           p.WaitForExit();
   
           const string fic = @"C:\Output.txt";
   
           System.IO.StreamWriter sw = new System.IO.StreamWriter(fic);
           sw.WriteLine(stdout);
           sw.Close();
       }
   
       catch (Exception e) {
   
           const string fic = @"C:\Error.txt";
   
           System.IO.StreamWriter sw = new System.IO.StreamWriter(fic);
           sw.WriteLine(e.Message);
           sw.Close();
       }
       }
   

What could be the problem?

UPDATE:

I've done more logging as suggested so i used Try...Catch to log both output and exceptions (updated code). Once executed on server web Output.txt file was created empty and Error.txt file was not created. No application errors/warnings were recorded on Event Viewer.

I opened a command prompt window on server and executing AcroRd32.exe /h /t "C:\inetpub\wwwroot\otweb\Content\Pdfs\orden20140627112547.pdf" "Bullzip Printer" the file was successfully printed out.

Answer 1

I finally found the solution. The only thing what helped me was set Application Pool Identity to Administrator account on IIS