Hi,

Refer this link

How to generate and download PDF Report from database in ASP.Net using iTextSharp C# and VB.Net

Following line of code uses to download without saving to server.

byte[] bytes = memoryStream.ToArray();
memoryStream.Close();
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "attachment; filename=Employee.pdf");
Response.ContentType = "application/pdf";
Response.Buffer = true;
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.BinaryWrite(bytes);
Response.End();
Response.Close();

The PDF is saved in MemoryStream object.

For full code refer the following article.

How to generate and download PDF Report from database in ASP.Net using iTextSharp C# and VB.Net