itextsharp adding image to existing pdf

Question

i am trying to add an image using itextsharp but not having any luck there are a ton of tutorials for adding an image to a new pdf doc but not and existing pdf so the .add m

Answer 1

using following code you can able to add image to each page in an existing pdf file. ( I use this code for desktop application)

string FileLocation = @"C:\\test\\pdfFileName.pdf"; // file path of pdf file
var uri = new Uri(@"pack://application:,,,/projrct_name;component/View/Icons/funnelGreen.png"); // use image from project/application folder (this image will insert to pdf)
var resourceStream = Application.GetResourceStream(uri).Stream; 
PdfReader pdfReader = new PdfReader(FileLocation);
PdfStamper stamp = new PdfStamper(pdfReader, new FileStream(FileLocation.Replace(".pdf", "(tempFile).pdf"), FileMode.Create));iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(System.Drawing.Image.FromStream(resourceStream), System.Drawing.Imaging.ImageFormat.Png);
img.SetAbsolutePosition(125, 350); // set the position in the document where you want the watermark to appear.
img.ScalePercent(35f);// not neccessory, use if you want to adjust image
img.ScaleToFit(140f, 100f); // not neccessory, use if you want to adjust image 
PdfContentByte waterMark;

for (int page = 1; page <= pdfReader.NumberOfPages; page++) // for loop will add image to each page. Based on the condition you can add image to single page also 
{
        waterMark = stamp.GetOverContent(page);
    waterMark.AddImage(img);
}

stamp.FormFlattening = true;
stamp.Close();// closing the pdfStamper, the order of closing must be important
pdfReader.Close();

File.Delete(FileLocation);
File.Move(FileLocation.Replace(".pdf", "(tempFile).pdf"), FileLocation);

Answer 2

I think you try the following adding it to bytes

        PdfReader reader = new PdfReader(pdfIn)
        FileStream fs = new FileStream(pdfOut, FileMode.Create);
        var stamper = new PdfStamper(reader, fs);
        var pdfContentByte = stamper.GetOverContent(1);
        iTextSharp.text.Image sigimage = iTextSharp.text.Image.GetInstance(bytes);
        sigimage.SetAbsolutePosition(100, 100);
        pdfContentByte.AddImage(sigimage);