How to add Header and Footer in dynamic pdf using iTextLibrary?

Question

I have created a PDF file dynamically using iText Library, Now I want to add Header and Footer

Answer 1

Please first refer to the accepted answer of this question.
That answer is very helpful (and It helped me to).
Just in case you are programming in C#, here is the SAME accepted answer but in C# version

/// 

/// Inner class to add a header and a footer.
/// 
internal class HeaderFooter : PdfPageEventHelper
{
    private Phrase[] header = new Phrase[2];
    private int pageNumber;

    public override void OnOpenDocument(PdfWriter writer, Document document)
    {
        header[0] = new Phrase("Smares in Header");
    }

    public override void OnChapter(PdfWriter writer, Document document, float paragraphPosition, Paragraph title)
    {
        header[1] = new Phrase(title.Content);
        pageNumber = 1;
    }

    public override void OnStartPage(PdfWriter writer, Document document)
    {
        pageNumber++;
    }

    public override void OnEndPage(PdfWriter writer, Document document)
    {
        Rectangle rect = writer.GetBoxSize("art");
        switch (writer.PageNumber % 2)
        {
            case 0:
                ColumnText.ShowTextAligned(writer.DirectContent,
                        Element.ALIGN_RIGHT, header[0],
                        rect.Right, rect.Top, 0);
                break;
            case 1:
                ColumnText.ShowTextAligned(writer.DirectContent,
                        Element.ALIGN_LEFT, header[1],
                        rect.Left, rect.Top, 0);
                break;
        }

        ColumnText.ShowTextAligned(writer.DirectContent,
                Element.ALIGN_CENTER, new Phrase(String.Format("page {0}", pageNumber)),
                (rect.Left + rect.Right) / 2, rect.Bottom - 18, 0);
    }
}

and the registration of the event will be :

using (MemoryStream ms = new MemoryStream())
{
    using (Document doc = new Document(PageSize.A4, -30, -30, 45, 45))
    {
        using (PdfWriter writer = PdfWriter.GetInstance(doc, ms))
        {
             HeaderFooter ev = new HeaderFooter();
             writer.SetBoxSize("art", new Rectangle(36, 54, 559, 788));
             writer.PageEvent = ev;

             // continue your code here 
        }
    }
}

NOTE : this is just a conversion of the accepted answer from java to C#. but you can customize this according to your needs, as I did with it.