Summary of reading PDF text under. net

There are two main class libraries used to read PDF text in. Net: product_box and itextsharp.

Let's talk about consumer box. This class library is said to be very powerful. Here I will just give a brief introduction:

1. Download product_box

: Http://sourceforge.net/projects/pdfbox/

2. Reference Dynamic Link Library

Decompress the downloaded export box and find the bin directory. You need to add the referenced DLL files in the project:
Ikvm. GNU. classpath. dll
PDFBox-0.7.3.dll
FontBox-0.1.0-dev.dll
Ikvm. runtime. dll
To reference the above four files to a project, you must introduce the following two namespaces to the file:
Using orgdomainbox. pdmodel;
Using orgdomainbox. util;

3. Check the code for API usage:

 

[CSHARP]View plaincopy

1. Using orgdomainbox. pdmodel;
2. Using orgdomainbox. util;
3. Public void cmd2txt (fileinfo file, fileinfo txtfile)
4. {
5. Pddocument Doc = pddocument. Load (file. fullname );
6. Extends textstripper extends stripper = new extends textstripper ();
7. String text = javasstripper. gettext (DOC );
8. Streamwriter swpdfchange = new streamwriter (txtfile. fullname, false, encoding. getencoding ("gb2312 "));
9. Swpdfchange. Write (text );
10. Swpdfchange. Close ();
11. }

Itextsharp is used to generate PDF files in many cases, but its ability to read PDF files is not bad. It is used as follows:

 

1. Download itextsharp

: Http://sourceforge.net/projects/itextsharp/

2. Reference Dynamic Link Library

Decompress the itextsharp-dll-core.zip file in the downloaded package to obtain itextsharp. dll. Add reference itextsharp. DLL to the project.
The following three namespaces must be introduced to the file:
Using itextsharp;
Using itextsharp. text;
Using itextsharp.text.pdf;

3. Check the code for API usage:

 

[CSHARP]View plaincopy

1. Private string oncreated (string filepath)
2. {
3. Try
4. {
5. String pdffilename = filepath;
6. Pdfreader = new pdfreader (pdffilename );
7. Int numberofpages = pdfreader. numberofpages;
8. String text = string. empty;
10. For (INT I = 1; I <= numberofpages; ++ I)
11. {
12. Byte [] bufferofpagecontent = pdfreader. getpagecontent (I );
13. Text + = system. Text. encoding. utf8.getstring (bufferofpagecontent );
14. }
15. Pdfreader. Close ();
17. Return text;
18. }
19. Catch (exception ex)
20. {
21. Streamwriter wlog = file. appendtext (system. appdomain. currentdomain. setupinformation. applicationbase + "\ mylog. log ");
22. Wlog. writeline ("error file:" + E. fullpath + "cause:" + ex. tostring ());
23. Wlog. Flush ();
24. Wlog. Close (); return NULL;
25. }
27. }