持codeproject合并版本分离双层完全CSDN.docVIP

作者tag:c#?pdf?windows/.net?开源?软件?支持?codeproject?合并?版本?分离?双层?完全?CSDN 推荐tag:c# .net?acrobat?reference table?pdfobjecttype? ?完全支持双层PDF！开源的PDF分离与合并软件，C#版本（转自codeproject） 原文出自: /csharp/giospdfsplittermerger.asp ? GIOS PDF Splitter and Merger Download C# .NET 1.1 project with source code - 36.8 Kb This is a screenshot of the GIOS PDF splitter and merger v1.0, the first open source PDF splitter and merger tool written in C# .NET. Introduction After the success of the GIOS PDF .NET library released on April, 2005, I decided to invest more of my time for the community. Extending and improving the PDF library was one of the things I could do, but what about the new features to be added? Well, I have to thank my friend Charles. Last month we were discussing about the new features to be added to the PDF library. He said: if you need another challenge, how about developing a PDF merger program? His words rocked me: There is no free Windows application that does this. Moreover, there is no open source project written in C#. So, I took the giant PDF reference by Acrobat for evaluating the possibility of doing that. Background Reading Adobes Portable Document Format (PDF) Specification, Third Edition, Version 1.4, Section 3.4, you will find that a PDF is made of: Header, which gives information about the kind of file it is (typically %PDF-1.4). Body, which contains the data of the objects. It gets 99 percent of the PDF size. Cross reference table, which gives the reader the capability of indexing objects without parsing the entire file. This is the secret behind fast navigation in a heavy document. A corrupted cross reference table doesnt compromise on the reading of the document but Acrobat takes too much time rebuilding it on the fly. Trailer, which contains the necessary information for opening the document, like the ID of the root object named Catalog. The Body is made of a nodal structure of generic objects. The Root or Catalog is a container of container of pages (Pa