How to return PDF to browser in MVC?

Return a FileContentResult. The last line in your controller action would be something like:

return File("Chap0101.pdf", "application/pdf");

If you are generating this PDF dynamically, it may be better to use a MemoryStream, and create the document in memory instead of saving to file. The code would be something like:

Document document = new Document();MemoryStream stream = new MemoryStream();try{    PdfWriter pdfWriter = PdfWriter.GetInstance(document, stream);    pdfWriter.CloseStream = false;    document.Open();    document.Add(new Paragraph("Hello World"));}catch (DocumentException de){    Console.Error.WriteLine(de.Message);}catch (IOException ioe){    Console.Error.WriteLine(ioe.Message);}document.Close();stream.Flush(); //Always catches me outstream.Position = 0; //Not sure if this is requiredreturn File(stream, "application/pdf", "DownloadName.pdf");

I got it working with this code.

using iTextSharp.text;using iTextSharp.text.pdf;public FileStreamResult pdf(){    MemoryStream workStream = new MemoryStream();    Document document = new Document();    PdfWriter.GetInstance(document, workStream).CloseStream = false;    document.Open();    document.Add(new Paragraph("Hello World"));    document.Add(new Paragraph(DateTime.Now.ToString()));    document.Close();    byte[] byteInfo = workStream.ToArray();    workStream.Write(byteInfo, 0, byteInfo.Length);    workStream.Position = 0;    return new FileStreamResult(workStream, "application/pdf");    }

You must specify :

Response.AppendHeader("content-disposition", "inline; filename=file.pdf");return new FileStreamResult(stream, "application/pdf")

For the file to be opened directly in the browser instead of being downloaded