pdf文件加水印源代码

给pdf文件加水印。源代码有详解。主要代码： PdfReader pdfReader = new PdfReader(inputPath); int numberOfPages = pdfReader.NumberOfPages; FileStream outputStream = new FileStream(outputPath, FileMode.Create); PdfStamper pdfStamper = new PdfStamper(pdfReader, outputStream); PdfContentByte waterMarkContent; string watermarkimagepath = watermarkPath; iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(watermarkimagepath); image.SetAbsolutePosit ion(250, 675); image.ScaleAbsoluteHeight(50); image.ScaleAbsoluteWidth(50); waterMarkContent = pdfStamper.GetUnderContent(1); waterMarkContent.AddImage(image); pdfStamper.Close(); pdfReader.Close(); System.IO.File.Delete(inputPath); System.IO.File.Move(outputPath, inputPath); System.IO.File.Delete(outputPath);