iTextSharp 5.3.3: replace the pages from the 1st document and insert the pages from the 2nd document instead of them - pdf

Question

Forgive me for the bad english.
I want replace the pages from the 1st document and insert the pages from the 2nd document instead of them. I use itextsharp 5.3.3. Pages of the Second document contain pictures.
My code:
reader1:=New iTextSharp.text.pdf.PdfReader (file_name_1);
reader2:=New iTextSharp.text.pdf.PdfReader (file_name_2);
Document:= New iTextSharp.text.Document();
Document.Compress:=False;
For i:=4 To reader1.NumberOfPages Do
reader1.SetPageContent(i,reader2.GetPageContent(i));
End For;
Stamper:=New iTextSharp.text.pdf.PdfStamper(reader1, New System.IO.FileStream(new_file_name, System.IO.FileMode.CreateNew));
stamper.Close();
As a result, the images in new document mixed up.
What am I doing wrong?
Thanks for any help!

Answer 1

Your code is wrong on many levels. You are copying content streams without copying any of the resources. I never want to see such code again, ever!
Please read http://www.manning.com/lowagie2/samplechapter6.pdf
The best way to achieve your assignment is to use PdfCopy. Create two PdfReader objects, and add 4 PdfImportedPage objects from the second reader, following by PdfImportedPage objects from the first reader starting at page 5.
Use the following code samples for inspiration:
http://itextpdf.com/examples/iia.php?id=123
http://kuujinbo.info/iTextInAction2Ed/index.aspx?ch=Chapter06&ex=Concatenate
If you've found a page advising to use your original approach, please let me know so that I can take action to have that page removed. If you've found this page on itextpdf.com, please DO NOT USE those examples WITHOUT READING THE DOCUMENTATION!