iTextSharp can Merge encrypted Pdf files

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   Hi.Use iTextSharp for .net can Merge encrypted Pdf files,
but use QuickPDF can't Merge encrypted Pdf files?

Thanks!

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mjohn Members Profile Find Members Posts Beginner Joined: 28 Oct 11 Location: ?? Status: Offline Points: 16	Post Options Post Reply Quote mjohn Report Post Thanks(0) Quote Reply Topic: iTextSharp can Merge encrypted Pdf files Posted: 31 Oct 11 at 9:39PM
	Hi. Use iTextSharp for .net can Merge encrypted Pdf files, but use QuickPDF can't Merge encrypted Pdf files? Thanks!

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3529	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 01 Nov 11 at 8:01AM
	Hi John! Many pdf-files are encrypted - so QuickPDF can do this job, too. I don't know if it's a problem merging encrypted pdf-files but: QuickPDF can load a pdf... then you can check if it's encrypted... if so you can decrypt it with an easy function call ;-) Cheers and welcome here, Ingo

mjohn Members Profile Find Members Posts Beginner Joined: 28 Oct 11 Location: ?? Status: Offline Points: 16	Post Options Post Reply Quote mjohn Report Post Thanks(0) Quote Reply Posted: 01 Nov 11 at 2:06PM
	Hi. Can you see https://skydrive.live.com/?cid=4c90f2a935f13d29&sc=documents&uc=1&id=4C90F2A935F13D29%21112# this is what i do use itextsharp.dll to merge 3 encrypted pdf files to a pdf file. when you double click ConsoleApplication1.exe, then it will create a PDFS.pdf that is merge from the 3 encrypted pdf files. but i can't do it use QuickPDF. How can do it use QuickPDF with vb6? Thanks! when use c#, below is the whole code: ////////////////////Code Begin////////////////////// sing System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using iTextSharp.text; using iTextSharp.text.pdf; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { MergePdfDoc(System.AppDomain.CurrentDomain.BaseDirectory + "PDFS"); } static private void MergePdfDoc(string sPath) { try { Document document = new Document(PageSize.A4, 50f, 50f, 50f, 50f); PdfReader reader = null; PdfCopy copy = new PdfCopy(document, new FileStream(sPath + ".pdf", FileMode.Append)); document.Open(); for (int i = 0; i <= Directory.GetFiles(sPath).Length; i++) { if (System.IO.File.Exists(string.Concat(new object[] { sPath, @"\", i, ".pdf" })) ) { reader = new PdfReader(string.Concat(new object[] { sPath, @"\", i, ".pdf" })); document.NewPage(); PdfImportedPage importedPage = copy.GetImportedPage(reader, 1); copy.AddPage(importedPage); } } if ((document != null) && document.IsOpen()) { if (copy.PageNumber == 0) { document.NewPage(); } document = null; if (reader != null) { reader.Close(); } copy.Close(); } } catch (Exception exception) { } } } } //////////////////Code End//////////////////////// whether i use ExtractFilePages or CapturePage or CopyPageRanges I can't merge the 3 encrypted pdf files to a pdf file as itextsharp.dll. Can you help? Thanks!

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3529	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 01 Nov 11 at 2:24PM
	Hi John! What you have to do is ... first the create ... then LoadFromFile or similar ... then check if the file is encrypted: If ( QP.EncryptionStatus > 0 ) Then QP.Decrypt; then the merge-syntax ... then the save. About encryption you can read here: http://www.quickpdflibrary.com/help/quickpdf/DocumentProperties.php About merge you can read here: http://www.quickpdflibrary.com/help/quickpdf/DocumentManipulation.php Samples in different development languages (packed as zip) are here: http://www.quickpdflibrary.com/samples/index.php In the developer-guide starting at page 28 you'll find a good merge-sample: http://www.quickpdflibrary.com/docs/Quick%20PDF%20Library%207%20Developer%20Guide.pdf It's a pascal-sample but for a developer it shouldn't be a problem to convert it to any other language. Cheers, Ingo Edited by Ingo - 01 Nov 11 at 2:25PM

mjohn Members Profile Find Members Posts Beginner Joined: 28 Oct 11 Location: ?? Status: Offline Points: 16	Post Options Post Reply Quote mjohn Report Post Thanks(0) Quote Reply Posted: 01 Nov 11 at 2:34PM
	Hi. Thank you for your reply! But I can't use QP.Decrypt, because I has no password. If I have password, I know I can! But I has no password. So I want merge 3 encrypted pdf files to 1 pdf file when I has no password! Above c# code, I has no password, I didn't need Decrypt the 3 pdf files, but I can merge them in 1 pdf file too. So when I know when I has no password, I use QuickPDF, how can I merge 3 encrypted pdf files to 1 pdf file as I did in itextsharp. Thanks@

mjohn Members Profile Find Members Posts Beginner Joined: 28 Oct 11 Location: ?? Status: Offline Points: 16	Post Options Post Reply Quote mjohn Report Post Thanks(0) Quote Reply Posted: 01 Nov 11 at 2:49PM
	Sorry! I am wrong! you are right! I can do it follow your instruction now! Thanks very much!

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3529	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 01 Nov 11 at 6:28PM
	Hi John! Seems that your password is only the main (and not the user password) password. This doesn't have any effects - if you load such a document it's unprotected temporary and you can do the merge. Cheers, Ingo