itextsharp operation pdf-- insert images, two-dimensional code, etc.

basic introduction

　　Business needs, we need to add functionality to the two-dimensional code pdf drawings, the implementation process record

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using System.IO;
using iTextSharp.text.pdf;

Insert Picture handler

        ///  <Summary> 
        /// added to the pdf image
         ///  </ Summary> 
        ///  <param name = "oldp"> Source address pdf </ param> 
        ///  <param name = "Imp"> image URL </ param> 
        ///  <param name = "X"> X-axis coordinate </ param> 
        ///  <param name = "Y"> Y-axis coordinate </ param> 
        protected  void AddImg ( String oldp, String Imp, int X, int Y) 
        { 
            String newp = Path.GetDirectoryName (oldp) + the Path.GetFileNameWithoutExtension(oldP) + "_temp.pdf"; ;
            try
            {                
                using (Stream inputPdfStream = new FileStream(oldP, FileMode.Open, FileAccess.Read, FileShare.Read))
                using (Stream inputImageStream = new FileStream(imP, FileMode.Open, FileAccess.Read, FileShare.Read))
                using (Stream outputPdfStream = new FileStream(newP, FileMode.Create, FileAccess.Write, FileShare.None))
                {
                    var reader = new PdfReader(inputPdfStream);//读取原有pdf
                    var stamper = newPdfStamper (Reader, outputPdfStream);
                     var pdfContentByte stamper.GetOverContent = ( . 1 ); // Get a first pdf page content 
                    iTextSharp.text.Image Image = iTextSharp.text.Image.GetInstance (inputImageStream); // get image 
                    image.ScalePercent ( 40 ); // set the image ratio 
                    image.SetAbsolutePosition (X, Y); // set the absolute position of the image 
                    pdfContentByte.AddImage (image); 
                    stamper.Close (); 
                } 
            } 
            the catch (Exception EX) 
            { 
                the throw EX;
            }
            finally
            {
                File.Copy(newP, oldP, true);
                File.Delete(newP);
            }
        }

achieve

        private void Button1_Click(object sender, EventArgs e)
        {
            try
            {
                string destPhysicalFile = @"C:\Users\Administrator\Desktop\K0000113_舱容图.pdf";
                string Img = @"C:\Users\Administrator\Desktop\1572568425.png";//图片文件路径
                AddImg(destPhysicalFile, Img, 129, 574);
                MessageBox.Show("ok");
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

effect