Cannot access a closed stream error

See more:

C#

ASP.NET

MVC

stream

memory

, +

I am using ItextSharp to generate pdf from Html tag.

on document load, one of my function loop through and created Table tags for each section which is then passed via ajax to my MVC Controller.

For test purpose when I hard code wrote the table tags and passed it did not throw any exception But when I created the table tags by looping through dom , I got below exception.

System.ObjectDisposedException: Cannot access a closed Stream.
   at System.IO.__Error.StreamIsClosed()
   at System.IO.MemoryStream.Write(Byte[] buffer, Int32 offset, Int32 count)
   at iTextSharp.text.pdf.OutputStreamCounter.Write(Byte[] buffer, Int32 offset, Int32 count)
   at iTextSharp.text.pdf.PdfIndirectObject.WriteTo(Stream os)
   at iTextSharp.text.pdf.PdfWriter.PdfBody.Write(PdfIndirectObject indirect, Int32 refNumber, Int32 generation)
   at iTextSharp.text.pdf.PdfWriter.PdfBody.Add(PdfObject objecta, Int32 refNumber, Int32 generation, Boolean inObjStm)
   at iTextSharp.text.pdf.PdfWriter.AddToBody(PdfObject objecta, PdfIndirectReference refa)
   at iTextSharp.text.pdf.Type1Font.WriteFont(PdfWriter writer, PdfIndirectReference piref, Object[] parms)
   at iTextSharp.text.pdf.FontDetails.WriteFont(PdfWriter writer)
   at iTextSharp.text.pdf.PdfWriter.AddSharedObjectsToBody()
   at iTextSharp.text.pdf.PdfWriter.Close()
   at iTextSharp.text.DocWriter.Dispose()

What I have tried:

My code is :

[HttpPost]
        [ValidateAntiForgeryTokenAjax]
        public ActionResult CreatePdf(string htmlData)
        {
            string fileName = "BillInvoice.pdf";
            try
            {

                using (var ms = new MemoryStream())
                {
                    using (var doc = new Document(PageSize.A4, 25, 25, 25, 25))
                    {
                        using (var writer = PdfWriter.GetInstance(doc, ms))
                        {
                            doc.Open();

                            using (var srHtml = new StringReader(htmlData))
                            {
                                iTextSharp.tool.xml.XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, srHtml);
                            }


                            CurrentHomeView = GetHomeView();
                            List<string> signBase64List = new List<string>(){
                                                                          CurrentHomeView.BillSig.GmSignature,
                                                                          CurrentHomeView.BillSig.DMSignature
                                                                        };

                            foreach (var sign in signBase64List)
                            {
                                if (!string.IsNullOrWhiteSpace(sign))
                                {
                                    string certbase64 = sign.Substring(sign.IndexOf(',') + 1);
                                    doc.Add(ConvertImage(certbase64));
                                }
                            }

                            doc.Close();
                        }
                       
                    }
                    TempData[fileName] = ms;
                    //ms.Position = 0;
                }
                return Json(new { success = true, fileName }, JsonRequestBehavior.AllowGet);
            }
            catch (Exception e)
            {
                fileName = e.ToString();
                return Json(new { success = false, fileName }, JsonRequestBehavior.AllowGet);
            }

        }
		
		 public iTextSharp.text.Image ConvertImage(string base64String)
		{
            iTextSharp.text.Image png = null;

            Byte[] bytes = Convert.FromBase64String(base64String);
            png = iTextSharp.text.Image.GetInstance(bytes);

            return png;
        }
		
		  public ActionResult DownloadCertPdf(string fileName)
        {
            var ms = TempData[fileName] as MemoryStream;
            if (ms == null)
            {
                return new EmptyResult();
            }
            TempData[fileName] = null;
            return File(ms.ToArray(), "application/pdf", fileName);
        }