c# itextsharp PDF creation with watermark on each page

Question

I am trying to programmatically create a number of PDF documents with a watermark on each page using itextsharp (a C# port of Java\'s itext).

I am able to do this

Answer 1

I used the first solution. I was having trouble getting it to work at first. I getting green underlines under all of my public voids saying that it was going to hide some inherit member.

Basically I realized that I already had added a PagePageEventHelper and I basically just cut out the code for the OnStartPage. ALSO! For some reason I had to make all of my public void's public override void.

  public override void OnStartPage(PdfWriter writer, Document document)
        {
            if (condition)
            {
                string watermarkText = "-whatever you want your watermark to say-";
                float fontSize = 80;
                float xPosition = 300;
                float yPosition = 400;
                float angle = 45;
                try
                {
                    PdfContentByte under = writer.DirectContentUnder;
                    BaseFont baseFont = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.EMBEDDED);
                    under.BeginText();
                    under.SetColorFill(iTextSharp.text.pdf.CMYKColor.LIGHT_GRAY);
                    under.SetFontAndSize(baseFont, fontSize);
                    under.ShowTextAligned(PdfContentByte.ALIGN_CENTER, watermarkText, xPosition, yPosition, angle);
                    under.EndText();
                }
                catch (Exception ex)
                {
                    Console.Error.WriteLine(ex.Message);
                }
            }
        }