How can I add an image to all pages of my PDF?

Document doc = new Document(iTextSharp.text.PageSize.A4, 10, 10, 30, 1);
PdfWriter writer = PdfWriter.GetInstance(doc,
    new FileStream(Server.MapPath("~/pdf/" + fname), FileMode.Create));
doc.Open();
Image image = Image.GetInstance(Server.MapPath("~/images/draft.png"));
image.SetAbsolutePosition(12, 300);
writer.DirectContent.AddImage(image, false);
doc.Close();

It's normal that the image is only added once; after all: you're adding it only once.

In iText 7 you should implement IEventHandler interface:

public class ImageEventHandler implements IEventHandler {
    protected Image img;

    public ImageEventHandler(Image img) {
        this.img = img;
    }
    @Override
    public void handleEvent(Event event) {
        PdfDocumentEvent docEvent = (PdfDocumentEvent) event;
        PdfDocument pdfDoc = docEvent.getDocument();
        PdfPage page = docEvent.getPage();
        PdfCanvas aboveCanvas = new PdfCanvas(page.newContentStreamAfter(),
                page.getResources(), pdfDoc);
        Rectangle area = page.getPageSize();
        new Canvas(aboveCanvas, pdfDoc, area)
                .add(img);
    }
}

Then set it on the PdfDocumentEvent.END_PAGE event:

ImageEventHandler handler = new ImageEventHandler(img);
pdfDoc.addEventHandler(PdfDocumentEvent.END_PAGE, handler);

So your code will look like this: public void createPdf(String dest) throws IOException { Image img = new Image(ImageDataFactory.create(IMG)).setFixedPosition(12, 300); PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest)); ImageEventHandler handler = new ImageEventHandler(img); pdfDoc.addEventHandler(PdfDocumentEvent.END_PAGE, handler); //add any content… pdfDoc.close(); }

This way the image will appear on every page at fixed position (12, 300). If you want an iText for C# example, you'll discover that it is very easy to port the Java to C#.

Click How can I add an image to all pages of my PDF? if you want to see how to answer this question in iText 5.