Generate PDF file in MVC using itextsharp dll

//pdf file Generate Code
                Document pdfDoc = new Document(PageSize.A4, 25, 10, 10, 10);
                PdfWriter pdfWriter = PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
                PdfDestination pdfDest = new PdfDestination(PdfDestination.XYZ, 0, pdfDoc.PageSize.Height, 0.99f);
                pdfDoc.Open();

               
                Font font11 = FontFactory.GetFont("ARIAL", 11);
                Font font12 = FontFactory.GetFont("ARIAL", 11,Font.UNDERLINE, iTextSharp.text.BaseColor.RED);
                Font font20 = FontFactory.GetFont("ARIAL", 20);

                iTextSharp.text.Image jpg = iTextSharp.text.Image.GetInstance(Server.MapPath("~/Images/BBClogo.jpg"));
                jpg.ScaleToFit(121F, 131F);
                jpg.Alignment = Image.ALIGN_RIGHT;
                pdfDoc.Add(jpg);

                Paragraph text = new Paragraph(20f, "Commercial Invoice", font20);
                text.Alignment = Element.ALIGN_CENTER;
                pdfDoc.Add(text);

                PdfPTable pdftable1 = new PdfPTable(4);

                float[] widthstab1 = new float[] { 1f, 2f, 1f, 2f };
                pdftable1.SetWidths(widthstab1);
                pdftable1.HorizontalAlignment = 1;
                pdftable1.SpacingBefore = 20f;
                pdftable1.SpacingAfter = 10f;


                PdfPCell cell = new PdfPCell();
                pdftable1.AddCell("Sender’s name:");
                pdftable1.AddCell(objInternationalBookModels.senderName);
                pdftable1.AddCell("Invoice No:");
                pdftable1.AddCell("           ");
                pdftable1.AddCell("Sender’s Address:");


                var pCollAdd = new Paragraph();

                if (objInternationalBookModels.collectionCompany != "" && objInternationalBookModels.collectionCompany != null)
                {
                    pCollAdd.Add(objInternationalBookModels.collectionCompany + "," + "\n");
                }
                if (objInternationalBookModels.collectionaddress1 != "" && objInternationalBookModels.collectionaddress1 != null)
                {
                    pCollAdd.Add(objInternationalBookModels.collectionaddress1 + "," + "\n");
                }
                if (objInternationalBookModels.collectionaddress2 != "" && objInternationalBookModels.collectionaddress2 != null)
                {
                    pCollAdd.Add(objInternationalBookModels.collectionaddress2 + "," + "\n");
                }
                if (objInternationalBookModels.collectiontown != "" && objInternationalBookModels.collectiontown != null)
                {
                    pCollAdd.Add(objInternationalBookModels.collectiontown + "," + "\n");
                }
                if (objInternationalBookModels.collectionpostcode != "" && objInternationalBookModels.collectionpostcode != null)
                {
                    pCollAdd.Add(objInternationalBookModels.collectionpostcode + "," + "\n");
                }
                if (objInternationalBookModels.CountryName != "" && objInternationalBookModels.CountryName != null)
                {
                    pCollAdd.Add(objInternationalBookModels.CountryName);
                }

                PdfPCell celsendadd = new PdfPCell(pCollAdd);
                celsendadd.Colspan = 2;
                pdftable1.AddCell(celsendadd);

                PdfPTable nested = new PdfPTable(2);
                nested.AddCell("HAWB:");
                nested.AddCell(objInternationalBookModels.HAWBNumber);
                nested.AddCell("Date:");
                nested.AddCell(objInternationalBookModels.collectionDate);
                nested.AddCell("Pieces:");
                nested.AddCell(objInternationalBookModels.totalNoofpieces.ToString());
                nested.AddCell("Weight:");
                nested.AddCell(objInternationalBookModels.totalweight.ToString());
                nested.AddCell("Currency:");
                nested.AddCell("GBP");
                PdfPCell nesthousing = new PdfPCell(nested);
                nesthousing.Padding = 0f;
                pdftable1.AddCell(nesthousing);

                pdftable1.AddCell("Consignee Name:");
                PdfPCell celDelConname = new PdfPCell(new Phrase(objInternationalBookModels.deliveryContactname));
                celDelConname.Colspan = 3;
                pdftable1.AddCell(celDelConname);

                pdftable1.AddCell("Delivery Address:");

                var pDelAdd = new Paragraph();
                if (objInternationalBookModels.deliveryCompany != "" && objInternationalBookModels.deliveryCompany != null)
                {
                    pDelAdd.Add(objInternationalBookModels.deliveryCompany + "," + "\n");
                }
                if (objInternationalBookModels.deliveryaddress1 != "" && objInternationalBookModels.deliveryaddress1 != null)
                {
                    pDelAdd.Add(objInternationalBookModels.deliveryaddress1 + "," + "\n");
                }
                if (objInternationalBookModels.deliveryaddress2 != "" && objInternationalBookModels.deliveryaddress2 != null)
                {
                    pDelAdd.Add(objInternationalBookModels.deliveryaddress2 + "," + "\n");
                }
                if (objInternationalBookModels.deliverytown != "" && objInternationalBookModels.deliverytown != null)
                {
                    pDelAdd.Add(objInternationalBookModels.deliverytown + "," + "\n");
                }
                if (objInternationalBookModels.deliverypostcode != "" && objInternationalBookModels.deliverypostcode != null)
                {
                    pDelAdd.Add(objInternationalBookModels.deliverypostcode + "," + "\n");
                }
                if (objInternationalBookModels.deliveryCountryName != "" && objInternationalBookModels.deliveryCountryName != null)
                {
                    pDelAdd.Add(objInternationalBookModels.deliveryCountryName);
                }

                PdfPCell celdeladd = new PdfPCell(pDelAdd);
                celdeladd.Colspan = 3;
                pdftable1.AddCell(celdeladd);

                pdftable1.AddCell("Telephone:");
                pdftable1.AddCell(objInternationalBookModels.deliveryContactNo);
                pdftable1.AddCell("Shipped via:");
                pdftable1.AddCell(objInternationalBookModels.SupplierName);
                pdfDoc.Add(pdftable1);

                if (objInternationalBookModels.lstContentdetails != null && objInternationalBookModels.lstContentdetails.Count > 0)
                {
                    PdfPTable pdftable2 = new PdfPTable(4);
                    float[] widthstab2 = new float[] { 1f, 2f, 1f, 2f };
                    pdftable2.SetWidths(widthstab2);
                    pdftable2.HorizontalAlignment = 1;
                    pdftable2.SpacingBefore = 20f;
                    // pdftable2.SpacingAfter = 20f;
                    Decimal totalShipmentValue = 0;
                    pdftable2.AddCell("Quantity");
                    pdftable2.AddCell("Contents");
                    pdftable2.AddCell("Item Value");
                    pdftable2.AddCell("Total Value");


                    for (int i = 0; i < objInternationalBookModels.lstContentdetails.Count; i++)
                    {
                        pdftable2.AddCell(objInternationalBookModels.lstContentdetails[i].quantity.ToString());
                        pdftable2.AddCell(objInternationalBookModels.lstContentdetails[i].content.ToString());
                        pdftable2.AddCell(objInternationalBookModels.lstContentdetails[i].totalvalue.ToString());
                        Decimal TotalXValue = objInternationalBookModels.lstContentdetails[i].quantity * objInternationalBookModels.lstContentdetails[i].totalvalue;
                        pdftable2.AddCell(TotalXValue.ToString());

                        totalShipmentValue = totalShipmentValue + TotalXValue;
                    }
                    pdfDoc.Add(pdftable2);



                    PdfPTable pdfTotalValue = new PdfPTable(4);
                    float[] widthsT = new float[] { 1f, 2f, 1f, 2f };
                    pdfTotalValue.SetWidths(widthsT);
                    pdfTotalValue.HorizontalAlignment = 1;

                    BaseColor basecol = new BaseColor(System.Drawing.Color.Red);
                    Font fontTotalvalue = FontFactory.GetFont("ARIAL", 12, basecol);
                    PdfPCell cellTotalValue = new PdfPCell(new Phrase("Total Shipment Value", fontTotalvalue));
                    cellTotalValue.Colspan = 3;
                    cellTotalValue.HorizontalAlignment = Element.ALIGN_RIGHT;
                    pdfTotalValue.AddCell(cellTotalValue);
                    pdfTotalValue.AddCell(totalShipmentValue.ToString());

                    pdfDoc.Add(pdfTotalValue);
                }

                if (objInternationalBookModels.producttype != null && objInternationalBookModels.producttype == "Document")
                {
                    PdfPTable pdftable3 = new PdfPTable(4);
                    float[] widths = new float[] { 1f, 2f, 1f, 2f };
                    pdftable3.SetWidths(widths);
                    pdftable3.HorizontalAlignment = 1;
                    pdftable3.SpacingBefore = 20f;
                    //pdftable3.SpacingAfter = 20f;

                    pdftable3.AddCell("Quantity");
                    pdftable3.AddCell("Contents");
                    pdftable3.AddCell("Item Value");
                    pdftable3.AddCell("Total Value");
                    pdftable3.AddCell("                    ");
                    pdftable3.AddCell("                    ");
                    pdftable3.AddCell("                    ");
                    pdftable3.AddCell("                    ");

                    pdftable3.AddCell("                    ");
                    pdftable3.AddCell("                    ");
                    pdftable3.AddCell("                    ");
                    pdftable3.AddCell("                    ");

                    pdfDoc.Add(pdftable3);


                    PdfPTable pdfTotalValueDoc = new PdfPTable(4);
                    float[] widthsT = new float[] { 1f, 2f, 1f, 2f };
                    pdfTotalValueDoc.SetWidths(widthsT);
                    pdfTotalValueDoc.HorizontalAlignment = 1;

                    BaseColor basecol = new BaseColor(System.Drawing.Color.Red);
                    Font fontTotalvalue = FontFactory.GetFont("ARIAL", 12, basecol);
                    PdfPCell cellTotalValue = new PdfPCell(new Phrase("Total Shipment Value", fontTotalvalue));
                    cellTotalValue.Colspan = 3;
                    cellTotalValue.HorizontalAlignment = Element.ALIGN_RIGHT;
                    pdfTotalValueDoc.AddCell(cellTotalValue);
                    pdfTotalValueDoc.AddCell("                        ");
                    pdfDoc.Add(pdfTotalValueDoc);

                }

                PdfPTable pdftable4 = new PdfPTable(2);
                float[] widthstab4 = new float[] { 1f, 2f };
                pdftable4.SetWidths(widthstab4);
                pdftable4.HorizontalAlignment = 1;

                pdftable4.SpacingBefore = 20f;
                pdftable4.SpacingAfter = 30f;
                pdftable4.AddCell("Senders Vat No:");
                pdftable4.AddCell("               ");
                pdftable4.AddCell("Reason For Export:");
                pdftable4.AddCell("                  ");
                pdftable4.AddCell("ECO Licence");
                pdftable4.AddCell("               ");
                pdftable4.AddCell("Terms of Delivery:");
                pdftable4.AddCell("               ");
                pdfDoc.Add(pdftable4);


                //Chunk chnk = new Chunk("I declare the above information is true and correct to the best of my knowledge.\n", font11);
                //chnk.SetUnderline(0.1f, -2f);
                Paragraph text2 = new Paragraph("I declare the above information is true and correct to the best of my knowledge.\n", font11);
                pdfDoc.Add(text2);

                Paragraph text5 = new Paragraph("Signed for on behalf of the shipper.\n", font11);
                pdfDoc.Add(text5);
                Paragraph text3 = new Paragraph("Name (in print):\n\n\n", font11);
                pdfDoc.Add(text3);
                Paragraph text4 = new Paragraph("Signature:", font11);
                pdfDoc.Add(text4);

                PdfAction pdfAct = PdfAction.GotoLocalPage(1, pdfDest, pdfWriter);
                pdfWriter.SetOpenAction(pdfAct);

                pdfWriter.CloseStream = false;
                pdfDoc.Close();
                Response.Buffer = true;
                Response.ContentType = "Application/pdf";
                Response.AddHeader("content-disposition", "attachment;filename=Commercial_Invoice_template_2014.pdf");
                Response.Cache.SetCacheability(HttpCacheability.NoCache);
                Response.Write(pdfDoc);
                Response.End();