CODEWITHSUNDEEP
c#itext
Santhosh Nayak
Santhosh Nayak

Reputation: 2288

Variable data on pdf

I want to add variable text and thumbnail images on specific position. Text with formatting like fontstyles,rotation etc.

 iTextSharp.text.pdf.PdfReader reader = null;
     Document document = new Document();
                   PdfWriter writer;
        writer = PdfWriter.GetInstance(document,
                       new FileStream(temp,
                       FileMode.Create, FileAccess.Write));
 reader = new iTextSharp.text.pdf.PdfReader(file);
                               size = reader.GetCropBox(1);

                   PdfContentByte cb = writer.DirectContent;
                   document.NewPage();
                   PdfImportedPage page = writer.GetImportedPage(reader,
                   pageNumber);
                   cb.AddTemplate(page, 0, 0);

                   document.Close();

This will copy first page to new document. I want to add text and images on new document. how to do that?

Upvotes: 1

Views: 1485

Answers (1)

Bruno Lowagie
Bruno Lowagie

Reputation: 77528

Many people will stop reading your question after your first sentence:

I want to Edit existing PDF

If you read the intro of chapter 6 of my book, you'll understand that the word Edit is not the right word to use.

I did read on, and that I saw that you were using Document and PdfWriter to stamp new content on an existing PDF. If you do the effort of reading chapter 6 of my book, you'll understand that this is wrong. You should use PdfStamper instead.

This is one of the examples provided online:

public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
    PdfReader reader = new PdfReader(src);
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
    Phrase header = new Phrase("Copy", new Font(FontFamily.HELVETICA, 14));
    for (int i = 1; i <= reader.getNumberOfPages(); i++) {
        float x = reader.getPageSize(i).getWidth() / 2;
        float y = reader.getPageSize(i).getTop(20);
        ColumnText.showTextAligned(
            stamper.getOverContent(i), Element.ALIGN_CENTER,
            header, x, y, 0);
    }
    stamper.close();
    reader.close();
}

You can find these examples on the following URLs:

If you need the examples from chapter 6 ported to C#, please visit this URL: http://tinyurl.com/itextsharpIIA2C06

Update

Does PdfStamper support:

  • font embedding: yes, when done correctly, fonts are embedded,
  • font size: yes, that's obvious,
  • font family: you provide the font program, the font program knows the font family,
  • alignments: for single lines: use showTextAligned(); for text blocks use ColumnText (caveat: read about the difference between text mode and composite mode)
  • rotation: for single lines, this is only a matter of providing a rotation angle; for text blocks, create a Form XObject and add this object using a rotation,
  • ...

Upvotes: 3

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