在现有pdf的每个页面添加页脚

Question

我使用iTextSharp在每页的现有pdf文件中添加页脚。我的代码有效，但我无法跳过第一页（我不想在页面上翻页），这是我的代码：

  public void Success()
    {

        var guid = Guid.NewGuid();

        var outPath = "~/Content/pdfs/Ebook - " + guid + ".pdf";
        var mappedPathIn = System.Web.Hosting.HostingEnvironment.MapPath("~/Content/pdfs/ebook - 1.pdf");
        var mappedPathOut = System.Web.Hosting.HostingEnvironment.MapPath(outPath);
        var pdfReader = new PdfReader(mappedPathIn);
        var size = pdfReader.GetPageSizeWithRotation(1);
        var document = new Document(size);

        var fs = new FileStream(mappedPathOut, FileMode.Create, FileAccess.Write);
        var writer = PdfWriter.GetInstance(document, fs);

        document.Open();

        PdfContentByte cb = writer.DirectContent;

        document.NewPage();
        PdfImportedPage tempPage = writer.GetImportedPage(pdfReader, 1);
        cb.AddTemplate(tempPage, 0, 0);

        writer.PageEvent =
           new PdfHelper("This is a test");

        for (int pageNumber = 2; pageNumber <= pdfReader.NumberOfPages; pageNumber++)
        {

            document.NewPage();
            PdfImportedPage page = writer.GetImportedPage(pdfReader, pageNumber);
            cb.AddTemplate(page, 0, 0);


        }

        document.Close();

   }

以下是我生成pdf的代码：

        PdfContentByte cb = writer.DirectContent;  

        document.NewPage();
        PdfImportedPage tempPage = writer.GetImportedPage(pdfReader, 1);
        cb.AddTemplate(tempPage, 0, 0);

        writer.PageEvent =
        new PdfHelper("This is a test");

所以我真的很累，从第2页开始循环并在循环之前添加第一页，然后设置PageEvent：

Custom a= new Custom("");
Custom b= a;

//b would be equal a. because they reference the same object.
Custom c= new Custom("");
//c would not be equal to a, although the value is the same.

但这也为他的第一页添加了页脚。