download a pdf file from a server doesn't work using itextSharp - pdf

Question

i've created a function that creates a pdf file and insert it into a doc file, problem is i can't download it from that directory, here is my code:
private void FillForm(Dictionary<string, string> dic)
{
var pdfTemplate = HttpContext.Current.Server.MapPath("~/ress/NOUVELLE_VERSION_GENE_15_04_2014.pdf"); //_pdfTemplet;
var newFile = _newFileName + "_" + Guid.NewGuid() + ".pdf";
_gNewFile = newFile.ToString();
var pdfReader = new PdfReader(System.IO.File.ReadAllBytes(pdfTemplate));
var pfileStream = new FileStream(string.Format(HttpContext.Current.Server.MapPath("~/ress/") + "{0}", newFile), FileMode.Create);
var pdfStamper = new PdfStamper(pdfReader, pfileStream);
var pdfFormFields = pdfStamper.AcroFields;
foreach (var entry in dic)
{
pdfFormFields.SetField(entry.Key, entry.Value);
}
pdfStamper.FormFlattening = true;
pdfStamper.JavaScript = "this.print(true);\r";
pdfStamper.Writer.CloseStream = false;
pdfReader.Close();
pdfStamper.Close();
UPContract.Update();
pfileStream.Close();
pdf.FilePath = string.Format("../Ress/{0}", Path.GetFileName(_gNewFile));
Response.Clear();
byte[] bytes = System.IO.File.ReadAllBytes(string.Format(HttpContext.Current.Server.MapPath("~/ress/") + "{0}", _gNewFile));
Response.ContentType = "application/pdf";
MemoryStream ms = new MemoryStream(bytes);
Response.AddHeader("content-disposition", "attachment;filename=" + "fiche abonnement_" + _gNewFile + ".pdf");
Response.Buffer = true;
ms.WriteTo(Response.OutputStream);
Response.Flush();
Response.End();
}
if anyone cant give me a tip ! thank you.

Answer 1

If you don't need the file on the file system, you can create it in memory. This is done using a MemoryStream. I took your code, copy/pasted it and adapted it so that the FileStream is replaced by a MemoryStream.
I couldn't test your code, so you may need to tweak it here and there, but you'll get the idea of what you should try to achieve:
var pdfTemplate = HttpContext.Current.Server.MapPath("...");
var pdfReader = new PdfReader(System.IO.File.ReadAllBytes(pdfTemplate));
var output = new MemoryStream();
var pdfStamper = new PdfStamper(pdfReader, output);
var pdfFormFields = pdfStamper.AcroFields;
foreach (var entry in dic)
{
pdfFormFields.SetField(entry.Key, entry.Value);
}
pdfStamper.FormFlattening = true;
pdfStamper.JavaScript = "this.print(true);\r";
pdfStamper.Writer.CloseStream = false;
pdfStamper.Close();
pdfReader.Close();
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "attachment;filename=fiche abonnement_" + _gNewFile + ".pdf");
Response.BinaryWrite(output.ToArray());
Response.Flush();
Response.End();