title: Generate PDF with iTextSharp
body: <p>I am trying to add an image to the top of every page on an existing PDF. I have tried using PdfStamp but for some reason when I try to print the pdf from Chrome all I get is a black page. Also Adobe Reader only shows the original document. Does anyone have any ideas on how to get it working? Here is the code.</p>
  
  <pre><code>public partial class MakePdf : System.Web.UI.Page
  {
      public MemoryStream m = new MemoryStream();
      protected void Page_Load(object sender, EventArgs e)
      {
          Document document = new Document(PageSize.LETTER);
  
          Response.ContentType = "application/pdf";
          string RESULT = @"C:\Users\maitchison\Documents\Pdf\Service Report Search - 650-10-067 4114.pdf";
          PdfReader reader = new PdfReader(RESULT);
          PdfStamper stamp = new PdfStamper(reader, m);
          try
          {
              // Set ContentType and create an instance of the Writer.
  
              Response.ContentType = "application/pdf";
              PdfWriter writer = PdfWriter.GetInstance(document, m);
              writer.CloseStream = false;
  
              // Open Document
  
              document.Open();
  
              int n = reader.NumberOfPages;
              int i = 1;
  
              PdfContentByte cb = writer.DirectContent;
              PdfContentByte over;
  
              Barcode128 barcode128 = new Barcode128();
              string text2 = "650-M5-013";
              barcode128.Code = text2;
              barcode128.ChecksumText = true;
              float x = document.Right;
              float y = document.Top;
              iTextSharp.text.Image img2 = barcode128.CreateImageWithBarcode(cb, null, null);
  
              img2.SetAbsolutePosition((x - img2.ScaledWidth), (y - img2.ScaledHeight));
  
              while (i &lt;= n)
              {
                  over = stamp.GetOverContent(i);
                  over.AddImage(img2);
  
                  i++;
  
              }
  
          }
  
          catch (DocumentException ex)
          {
              Console.Error.WriteLine(ex.StackTrace);
              Console.Error.WriteLine(ex.Message);
          }
  
          // Close document
          stamp.Close();
          //document.Close();
  
          // Write pdf bytes to outputstream.
  
          Response.OutputStream.Write(m.GetBuffer(), 0, m.GetBuffer().Length);
          Response.OutputStream.Flush();
          Response.OutputStream.Close();
          m.Close();
  
  
      }
  
  
  }
  </code></pre>
  
  <p>}</p>