PDF浮水印產生 C#

引用

private void Printpdf()

        {
            

            //String sFileIn = args[0];   // command line parameter: input filename

            string sFileIn = @"c:\sample.pdf";
            PdfReader reader = new PdfReader(sFileIn);
            using (MemoryStream ms = new MemoryStream())
            {
                PdfStamper stamper = new PdfStamper(reader, ms);
                for (int i = 1; i <= reader.NumberOfPages; i++)
                {
                    iTextSharp.text.Rectangle pageSize = reader.GetPageSizeWithRotation(i);
                    PdfContentByte pdfPageContents = stamper.GetUnderContent(i);
                    pdfPageContents.BeginText();
                    BaseFont baseFont = BaseFont.CreateFont(BaseFont.HELVETICA_BOLD, Encoding.ASCII.EncodingName, false);
                    pdfPageContents.SetFontAndSize(baseFont, 20);
                    pdfPageContents.SetRGBColorFill(200, 200, 200);
                    pdfPageContents.ShowTextAligned(PdfContentByte.ALIGN_RIGHT, sFileIn, pageSize.Width - 5, pageSize.Height - 25, 0);
                    pdfPageContents.EndText();
                }
                stamper.FormFlattening = true;
                stamper.Close();
                FileStream fs = new FileStream("watermarked-output.pdf", FileMode.Create, FileAccess.ReadWrite);
                BinaryWriter bw = new BinaryWriter(fs);
                bw.Write(ms.ToArray());
                bw.Close();
            }
        }