SelectPdf for .NET - Modify Existing Pdf Document to Add Headers and Footers - C# / ASP.NET Sample

This sample shows how to modify an existing PDF document using SelectPdf to make space for headers and footers and how to add the header and footer to the existing pdf document.

Headers and footers are designed using pdf templates. Header is displayed at the top of the page. Footer is displayed at the bottom of the page. They contain elements that repeat on each page of the pdf document.

Note: doc.Header and doc.Footer properties must not be used in this case, as they only work for new pdf documents or new pdf pages.

The sample uses the following (existing) test PDF:
Test PDF document

Sample Code C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;

namespace SelectPdf.Samples
    public partial class existing_pdf_headers_and_footers : System.Web.UI.Page
        protected void BtnCreatePdf_Click(object sender, EventArgs e)
            // the test file
            string filePdf = Server.MapPath("~/files/selectpdf.pdf");
            string imgFile = Server.MapPath("~/files/logo.png");

            // resize the content
            PdfResizeManager resizer = new PdfResizeManager();

            // add extra top and bottom margins
            resizer.PageMargins = new PdfMargins(0, 0, 90, 40);

            // add the header and footer to the existing (now resized pdf document)
            PdfDocument doc = resizer.GetDocument();

            // header template (90 points in height) with image element
            PdfTemplate header = doc.AddTemplate(doc.Pages[0].ClientRectangle.Width, 90);
            PdfImageElement img1 = new PdfImageElement(10, 10, imgFile);

            // footer template (40 points in height) with text element
            PdfTemplate footer = doc.AddTemplate(new RectangleF(0, 
                doc.Pages[0].ClientRectangle.Height - 40, 
                doc.Pages[0].ClientRectangle.Width, 40));

            // create a new pdf font
            PdfFont font2 = doc.AddFont(PdfStandardFont.Helvetica);
            font2.Size = 12;
            PdfTextElement text1 = new PdfTextElement(10, 10,
                "Generated by SelectPdf. Page number {page_number} of {total_pages}.", 
            text1.ForeColor = System.Drawing.Color.Blue;

            // save pdf document
            doc.Save(Response, false, "Sample.pdf");

            // close pdf document