Extracting attachments from a PDF file and write it out to a file
using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Text; | |
using iTextSharp.text.pdf; | |
namespace PDFExtract | |
{ | |
public class PDFExtractor | |
{ | |
public void ExtractAttachments() | |
{ | |
} | |
// Origin of the code: http://stackoverflow.com/questions/3007780/itextsharp-how-to-open-read-extract-a-file-attachment | |
internal void ExtractAttachments(string file_name, string folderName) | |
{ | |
PdfDictionary documentNames = null; | |
PdfDictionary embeddedFiles = null; | |
PdfDictionary fileArray = null; | |
PdfDictionary file = null; | |
PRStream stream = null; | |
PdfReader reader = new PdfReader(file_name); | |
PdfDictionary catalog = reader.Catalog; | |
documentNames = (PdfDictionary)PdfReader.GetPdfObject(catalog.Get(PdfName.NAMES)); | |
if (documentNames != null) | |
{ | |
embeddedFiles = (PdfDictionary)PdfReader.GetPdfObject(documentNames.Get(PdfName.EMBEDDEDFILES)); | |
if (embeddedFiles != null) | |
{ | |
PdfArray filespecs = embeddedFiles.GetAsArray(PdfName.NAMES); | |
for (int i = 0; i < filespecs.Size; i++) | |
{ | |
// i++; commenting this out as it is a mistake to change the loop variable | |
fileArray = filespecs.GetAsDict(i); | |
file = fileArray.GetAsDict(PdfName.EF); | |
foreach (PdfName key in file.Keys) | |
{ | |
stream = (PRStream)PdfReader.GetPdfObject(file.GetAsIndirectObject(key)); | |
string attachedFileName = fileArray.GetAsString(key).ToString(); | |
byte[] attachedFileBytes = PdfReader.GetStreamBytes(stream); | |
System.IO.File.WriteAllBytes(attachedFileName, attachedFileBytes); | |
} | |
} | |
} | |
} | |
} | |
} | |
} |
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That is a mistake. I will fix it right away. Thanks for pointing out |
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Thanks for the solution! Curious, how come the counter is added again here https://gist.github.com/gyurisc/1026807#file-pdfextractor-cs-L38 ?