Move table of contents to first page in itextsharp not itext7

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C#

ASP.NET

itextsharp

below is my method to generate pdf,

protected void startpdfgeneration()
        {
            try
            {
                pdfDoc = new Document(PageSize.A4, 10f, 10f, 45f, 25f);
                PdfWriter writer = PdfWriter.GetInstance(pdfDoc, System.Web.HttpContext.Current.Response.OutputStream);
                writer.SetLinearPageMode();
                ITextEvents evento = new ITextEvents();
                writer.PageEvent = evento;

                PdfDestination pdfDest = new PdfDestination(PdfDestination.XYZ, 0, pdfDoc.PageSize.Height, 1f);
                pdfDoc.Open();

                PdfAction action = PdfAction.GotoLocalPage(1, pdfDest, writer);
                writer.SetOpenAction(action);

                //some codes to write content into pdf
                


                pdfDoc.NewPage();
                PdfPTable table = new PdfPTable(1);
                PdfPCell cell = new PdfPCell();
                cell.BorderColor = BaseColor.WHITE;
                Paragraph toc = new Paragraph("Table Of Contents", tocFont);
                toc.Alignment = Element.ALIGN_CENTER;
                cell.AddElement(toc);
                table.AddCell(cell);
                pdfDoc.Add(table);

                Chunk dottedLine = new Chunk(new DottedLineSeparator());
                List<PageIndex> entries = evento.getTOC();

                Paragraph p;
                foreach (PageIndex pageIndex in entries)
                    {
                        Chunk chunk = new Chunk(pageIndex.Text);
                        chunk.SetAction(PdfAction.GotoLocalPage(pageIndex.Name, false));
                        p = new Paragraph(chunk);
                        p.Add(dottedLine);

                        chunk = new Chunk(pageIndex.Page.ToString());
                        chunk.SetAction(PdfAction.GotoLocalPage(pageIndex.Name, false));
                        p.Add(chunk);

                        pdfDoc.Add(p);
                    }
                pdfDoc.Close();

                
                //Download the PDF file.
                HttpContext.Current.Response.ContentType = "application/pdf";
                HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename="+txtNumber.Text.Trim()+".pdf");
                HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
                HttpContext.Current.Response.Write(pdfDoc);

                HttpContext.Current.Response.Flush(); // Sends all currently buffered output to the client.
                HttpContext.Current.Response.SuppressContent = true;  // Gets or sets a value indicating whether to send HTTP content to the client.
                HttpContext.Current.ApplicationInstance.CompleteRequest();
            }
            catch (Exception ex)
            {
            }
        }

Below is my pageeventhandler class for header, footer and toc

    public class ITextEvents : PdfPageEventHelper
    {
        protected int counter = 0;
        protected List<PageIndex> toc = new List<PageIndex>();

        // This is the contentbyte object of the writer
        PdfContentByte cb;

        // we will put the final number of pages in a template
        PdfTemplate headerTemplate, footerTemplate;

        // this is the BaseFont we are going to use for the header / footer
        BaseFont bf = null;
        

        #region Fields
        private string _header;
        #endregion

        #region Properties
        public string Header
        {
            get { return _header; }
            set { _header = value; }
        }
        #endregion

        public override void OnGenericTag(PdfWriter writer, Document document, Rectangle rect, string text)
        {
            String name = "dest" + (counter++);
            int page = writer.PageNumber;
            toc.Add(new PageIndex() { Text = text, Name = name, Page = page });
            writer.DirectContent.LocalDestination(name, new PdfDestination(PdfDestination.FITH, rect.GetTop(0)));
        }

        public List<PageIndex> getTOC()
        {
            return toc;
        }

        public override void OnOpenDocument(PdfWriter writer, Document document)
        {
            try
            {
                bf = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
                cb = writer.DirectContent;
                headerTemplate = cb.CreateTemplate(100, 100);
                footerTemplate = cb.CreateTemplate(50, 50);
            }
            catch (DocumentException de)
            {
            }
            catch (System.IO.IOException ioe)
            {
            }
        }

        public override void OnEndPage(iTextSharp.text.pdf.PdfWriter writer, iTextSharp.text.Document document)
        {
            base.OnEndPage(writer, document);
            iTextSharp.text.Font baseFontNormal = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 8f, iTextSharp.text.Font.NORMAL, iTextSharp.text.BaseColor.BLACK);
            iTextSharp.text.Font baseFontBig = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 12f, iTextSharp.text.Font.BOLD, iTextSharp.text.BaseColor.BLACK);


            //Create PdfTable object
            PdfPTable pdfTab = new PdfPTable(2);

            //We will have to create separate cells to include image logo and 2 separate strings
            //Row 1
            PdfPCell pdfCell1 = new PdfPCell(new Phrase(string.Empty, baseFontNormal));
           

            Image logoimg = Image.GetInstance(System.Web.HttpContext.Current.Server.MapPath("logo.png"));
            logoimg.ScaleToFit(105f, 33f);
            PdfPCell pdfCell2 = new PdfPCell(logoimg);

            String text = "Page " + writer.PageNumber + " of ";

            //Add paging to header
            //{
            //    cb.BeginText();
            //    cb.SetFontAndSize(bf, 12);
            //    cb.SetTextMatrix(document.PageSize.GetRight(200), document.PageSize.GetTop(45));
            //    cb.ShowText(text);
            //    cb.EndText();
            //    float len = bf.GetWidthPoint(text, 12);
            //    //Adds "12" in Page 1 of 12
            //    cb.AddTemplate(headerTemplate, document.PageSize.GetRight(200) + len, document.PageSize.GetTop(45));
            //}
            //Add paging to footer
            {
                cb.BeginText();
                cb.SetFontAndSize(bf, 8);
                cb.SetTextMatrix(document.PageSize.GetRight(100), document.PageSize.GetBottom(10));
                cb.ShowText(text);
                cb.EndText();
                float len = bf.GetWidthPoint(text, 8);
                cb.AddTemplate(footerTemplate, document.PageSize.GetRight(100) + len, document.PageSize.GetBottom(10));
            }


            //set the alignment of all three cells and set border to 0
            pdfCell1.HorizontalAlignment = Element.ALIGN_LEFT;
            pdfCell2.HorizontalAlignment = Element.ALIGN_RIGHT;
            pdfCell1.Border = 0;
            pdfCell2.Border = 0;





            //add all three cells into PdfTable
            pdfTab.AddCell(pdfCell1);
            pdfTab.AddCell(pdfCell2);


            pdfTab.TotalWidth = document.PageSize.Width-8;

            //pdfTab.HorizontalAlignment = Element.ALIGN_CENTER;    

            //call WriteSelectedRows of PdfTable. This writes rows from PdfWriter in PdfTable
            //first param is start row. -1 indicates there is no end row and all the rows to be included to write
            //Third and fourth param is x and y position to start writing
            pdfTab.WriteSelectedRows(0, -1, 5, document.PageSize.Height-5, writer.DirectContent);

        }

        public override void OnCloseDocument(PdfWriter writer, Document document)
        {
            base.OnCloseDocument(writer, document);

            headerTemplate.BeginText();
            headerTemplate.SetFontAndSize(bf, 8);
            headerTemplate.SetTextMatrix(0, 0);
            headerTemplate.ShowText((writer.PageNumber - 1).ToString());
            headerTemplate.EndText();

            footerTemplate.BeginText();
            footerTemplate.SetFontAndSize(bf, 8);
            footerTemplate.SetTextMatrix(0, 0);
            footerTemplate.ShowText((writer.PageNumber).ToString());
            footerTemplate.EndText();
        }
    }

    public class PageIndex
    {
        public string Text { get; set; }
        public string Name { get; set; }
        public int Page { get; set; }
    }
}

TOC is getting generated and coming in last page. I want to reorder it to first page.

What I have tried:

I have no idea to try. Everywhere i see is itext7 but i am using itextsharp.