itextsharp pdf creation run on local not in server - asp.net

Question

I create a PDF file using iTextSharp and it's stored in my system desktop and opens successfully in my local system. Now if I upload the same code to a server, no error occurs and the PDF file isn't created. This is my partial code to create and open pdf.
PdfWriter.GetInstance(doc, new FileStream(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\\Out.pdf", FileMode.Create));
doc.Open();
DataView DView = (DataView)Session["data_value"];
dtData = DView.ToTable();
dr = dtData.Select("fldemp_no='" + Session["EmployeeID"].ToString() + "'");
doc.NewPage();
iTextSharp.text.Image ObjImg = iTextSharp.text.Image.GetInstance(Server.MapPath("~/Bin/Head.png"));
ObjImg.Alignment = iTextSharp.text.Image.ALIGN_CENTER;
ObjImg.ScaleToFit(220f, 150f);
ObjImg.SpacingBefore = 13f;
ObjImg.SpacingAfter = 1f;
doc.Add(ObjImg);
maintable = new PdfPTable(1);
cell = new PdfPCell(new Phrase("Pay Slip for the month of " + dr[0]["fldmonth"].ToString(), fnt1));
cell.HorizontalAlignment = Element.ALIGN_CENTER;
cell.Border = 0;
maintable.AddCell(cell);
doc.Add(maintable);
maintable = new PdfPTable(2);
empdetright = new PdfPTable(2);
empdetleft = new PdfPTable(2);
cell = new PdfPCell(new Phrase("Emp No", fnt1));
cell.Border = 0;
empdetright.AddCell(cell);
cell = new PdfPCell(new Phrase(": " + dr[0]["fldemp_no"].ToString(), fnt1));
cell.Border = 0;
empdetright.AddCell(cell);
cell = new PdfPCell(new Phrase("Emp Name", fnt1));
cell.Border = 0;
empdetright.AddCell(cell);
cell = new PdfPCell(new Phrase(": " + dr[0]["fldempname"].ToString(), fnt1));
cell.Border = 0;
empdetright.AddCell(cell);
doc.Close();
Process.Start(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "/out.pdf");

Answer 1

In a web application you need to return the PDF document in the response stream. Here is a simple example:
var response = HttpContext.Current.Response;
response.Clear();
response.ContentType = "application/pdf";
MemoryStream mem = new MemoryStream(); // PDF data will be written here
PdfWriter writer = PdfWriter.GetInstance(doc, mem); // tie a PdfWriter instance to the stream
doc.Open();
// ... Doing the pdf generation
doc.Close();
// write the document data to response stream
writer.Flush();
response.OutputStream.Write(mem.GetBuffer(), 0, mem.GetBuffer().Length);
response.OutputStream.Flush();
response.OutputStream.Close();
response.End();