iTextSharp PDF页脚在Adobe Reader

Question

我使用下面显示的代码在每个页面的现有BYTES中添加页脚文本，这在Chrome和Foxit PhantomPDF中都可见，但是，它在Adobe PDF阅读器中不可见。

除了页脚之外，我还添加了即使使用Adobe也可以看到的标题。

private byte[] AddPageHeaderFooter(byte[] pdf, float marginLeft, float marginRight, float marginTop,
    float marginBottom, DataSet prospectDetails, ref int startingPageNumber, string logoPath, bool isLandscape = false)
{
    var dataRow = prospectDetails.Tables[0].Rows[0];
    var prospectDate = Convert.ToDateTime(dataRow[0]);

    using (var stream = new MemoryStream())
    {
        stream.Write(pdf, 0, pdf.Length);
        var reader = new PdfReader(pdf);
        var document = new Document(reader.GetPageSizeWithRotation(1), marginLeft, marginRight, marginTop,
            marginBottom);
        var writer = PdfWriter.GetInstance(document, stream);
        document.Open();
        var contentByte = writer.DirectContent;
        var pageIndex = startingPageNumber;
        for (var page = 1; page <= reader.NumberOfPages; page++)
        {
            document.NewPage();
            pageIndex++;
            var importedPage = writer.GetImportedPage(reader, page);
            if (isLandscape)
                contentByte.AddTemplate(importedPage, 0, -1f, 1f, 0, 0,
                    reader.GetPageSizeWithRotation(page).Height);
            else
                contentByte.AddTemplate(importedPage, 0, 0);
            contentByte.BeginText();
            var baseFont = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);

            // Code to add header 

            // Footer
            // Not visible parts **START**
            contentByte.SetFontAndSize(baseFont, 7);
            var prospectDateString = string.Format("{0:ddd, MMM d, yyyy}", prospectDate);
            contentByte.ShowTextAligned(PdfContentByte.ALIGN_CENTER,
                "FOOTER LINE 1",
                isLandscape ? 398 : 305f, 50, 0);
            contentByte.ShowTextAligned(PdfContentByte.ALIGN_CENTER,
                "FOOTER LINE 2", isLandscape ? 398 : 305f, 42, 0);
            contentByte.ShowTextAligned(PdfContentByte.ALIGN_LEFT,
                prospectDateString.Substring(5, prospectDateString.Length - 5), document.Left, marginBottom, 0);
            contentByte.ShowTextAligned(PdfContentByte.ALIGN_CENTER, "-     " + pageIndex + "     -",
                isLandscape ? 398 : 305f, marginBottom, 0);
            contentByte.ShowTextAligned(PdfContentByte.ALIGN_RIGHT, string.Format("{0:T}", prospectDate),
                document.Right, marginBottom, 0);
            contentByte.EndText();
            contentByte.SaveState();
            // Not visible parts **END**

            // Footer line
            // Not visible parts **START**
            contentByte.SetColorStroke(new PdfSpotColor("black", new BaseColor(0, 0, 0)), 100);
            contentByte.SetLineWidth(0.25f);
            contentByte.Rectangle(marginLeft, 58, isLandscape ? 732 : 552, 0.25f);
            contentByte.FillStroke();
            // Not visible parts **END**

            contentByte.RestoreState();
        }
        startingPageNumber = pageIndex;
        document.Close();
        return stream.ToArray();
    }
}

问题：

1. 在Adobe中只能看到我绘制的页脚行。
2. 即使我尝试打印文档，页脚文本即页脚行1，页脚行2，日期以及页码也不可见。

截图：