You shouldn’t “guess” for the possible values. You need to use a value that is stored in the PDF. Try the CheckBoxValues example to find these possible values: public String getCheckboxValue(String src, String name) throws IOException { PdfReader reader = new PdfReader(SRC); AcroFields fields = reader.getAcroFields(); // CP_1 is the name of a check box … Read more
If you want to change the contents of an existing PDF file and add extra content such as watermarks, pagenumbers, extra headers, PdfStamper is the object you need. I have successfully used the following code to insert an image into an existing pdf file to a given absolute position: using System.IO; using iTextSharp.text; using iTextSharp.text.pdf; … Read more
You need to implement the IElementHandler interface in a class of your own: public class SampleHandler : IElementHandler { //Generic list of elements public List<IElement> elements = new List<IElement>(); //Add the supplied item to the list public void Add(IWritable w) { if (w is WritableElement) { elements.AddRange(((WritableElement)w).Elements()); } } } Instead of using the file … Read more
This will only work if you flatten the form. I’ve written a proof of concept where I have a PDF form src that has a field named “body”: public void manipulatePdf(String src, String dest) throws DocumentException, IOException { PdfReader reader = new PdfReader(src); Rectangle pagesize = reader.getPageSize(1); PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest)); Paragraph … Read more
The problem arises because the memory stream gets implicitly closed when the PdfStamper is closed. To prevent this add pdfStamper.Writer.CloseStream = false; before pdfStamper.Close(); This instructs the stamper not to close the stream.
First of all… Why does the OP’s (updated) code not work There actually are two factors. First of all, there is an issue in the OP’s code, to add a rectangle to a path he uses canvas.Rectangle(rect); Unfortunately this does not what he expects: The Rectangle class has multiple properties beyond the mere coordinates of … Read more
Resolved… Even I got the same exception of “Parameter is not valid” and after so much of work with the help of the link provided by der_chirurg (http://kuujinbo.info/iTextSharp/CCITTFaxDecodeExtract.aspx ) I resolved it and following is the code: using System.Drawing; using System.Drawing.Imaging; using System.IO; using iTextSharp.text.pdf.parser; using Dotnet = System.Drawing.Image; using iTextSharp.text.pdf; namespace PDF_Parsing { partial … Read more
iText/iTextSharp can generate and/or modify existing PDFs but they do not perform any rendering which is what you are looking for. I would recommend checking out Ghostscript or some other library that knows how to actually render a PDF.
It’s normal that the image is only added once; after all: you’re adding it only once. (Or you’ve left away some essential steps in your code snippet: see the edit I made.) In any case: you can solve your problem by using a page event. There are some examples in Java here: http://itextpdf.com/sandbox/events Or you … Read more
Here’s a good example for adding total page number to every page. EDIT: Here is the code from that site in case it ever goes away: using System; using System.Collections.Generic; using System.Text; using iTextSharp.text.pdf; using iTextSharp.text; namespace PDF_Tests { public class TwoColumnHeaderFooter :PdfPageEventHelper { // This is the contentbyte object of the writer PdfContentByte cb; … Read more