Search code examples
c#pdfitext

Reading PDF Annotations with iText

I trying to get the contents of a PDF annotation to string so I can store that information in a database for searching purposes.

Does anyone know how to accomplish this using iText/iTextSharp?

Solution

  • Yes, but the specifics really depend on what kind[s] of annotations you're talking about.

    In general:

    PdfDictionary pageDict = myPdfReader.getPageN(firstPageIsOne);

PdfArray annotArray = pageDict.getAsArray(PdfName.ANNOTS);

for (int i = 0; i < annotArray.size(); ++i) {
  PdfDictionary curAnnot = annotArray.getAsDict(i);
  
  int someType = myCodeToGetAnAnnotsType(curAnnot);
  if (someType == THIS_TYPE) {
    writeThisType(curAnnot);
  } else if (someType == THAT_TYPE) {
    writeThatType(curAnnot);
  }
}

    For details, you'll need to examine the PDF Specification, in particular the annotation descriptions: "Chapter 12.5.6 Annotation Types".

    If you can tell us what types you care about, I can be of more help.