[Go]. NET reading of PDF text

This article transferred from: http://blog.csdn.net/wangqiuyun/article/details/8548779

There are two main libraries used to read PDF text under. NET: PDFBox and Itextsharp.

First said PDFBox, this class library is said to be very powerful, I am just a brief introduction:

1. Download PDFBox

: http://sourceforge.net/projects/pdfbox/

2. referencing the dynamic link library

To extract the downloaded PDFBox, locate the bin directory in which the referenced DLL file needs to be added in the project: IKVM. Gnu. Classpath.dll Pdfbox-0.7.3.dll Fontbox-0.1.0-dev.dll IKVM. Runtime.dll references the above 4 files to the project, the following 2 namespaces need to be introduced in the file: using Org.pdfbox.pdmodel; Using Org.pdfbox.util;

3, the use of the API to see the code:

[CSharp]View Plaincopyprint?

2. Using Org.pdfbox.pdmodel;
4. Using Org.pdfbox.util;
6. Public void Pdf2txt (FileInfo file,fileinfo txtfile)
8. {
10. PDDocument doc = pddocument.load (file. FullName);
12. Pdftextstripper pdfstripper = new Pdftextstripper ();
14. string text = Pdfstripper.gettext (DOC);
16. StreamWriter Swpdfchange = new StreamWriter (txtfile.  FullName, false, Encoding.GetEncoding ("gb2312"));
18. Swpdfchange.write (text);
20. Swpdfchange.close ();
22. }

Using org.pdfbox.pdmodel;using org.pdfbox.util;public void Pdf2txt (FileInfo file,fileinfo txtfile) {        pddocument doc = pddocument.load (file. FullName);        Pdftextstripper pdfstripper = new Pdftextstripper ();        string text = Pdfstripper.gettext (doc);        StreamWriter Swpdfchange = new StreamWriter (txtfile. FullName, False, Encoding.GetEncoding ("gb2312"));        Swpdfchange.write (text);        Swpdfchange.close ();}

Itextsharp, in fact, is often used to generate PDFs, but his ability to read PDFs is not bad, using the following:

1. Download Itextsharp

: http://sourceforge.net/projects/itextsharp/

2. referencing the dynamic link library

Unzip the downloaded compressed package inside the Itextsharp-dll-core.zip, get itextsharp.dll, add Reference Itextsharp.dll in the project can be in the file to introduce the following 3 namespaces: Using Itextsharp; Using Itextsharp.text; Using ITextSharp.text.pdf;

3, the use of the API to see the code:

[CSharp]View Plaincopyprint?

2. Private string oncreated (string filepath)
4. {
6. Try
8. {
10. string pdffilename = filepath;
12. Pdfreader Pdfreader = new Pdfreader (Pdffilename);
14. int numberofpages = pdfreader.numberofpages;
16. string text = string.  Empty;
20. For (int i = 1; I <= numberofpages; ++i)
22. {
24. byte[] bufferofpagecontent = pdfreader.getpagecontent (i);
26. Text + = System.Text.Encoding.UTF8.GetString (bufferofpagecontent);
28. }
30. Pdfreader.close ();
34. return text;
36. }
38. catch (Exception ex)
40. {
42. StreamWriter Wlog = File.appendtext (system.appdomain.currentdomain.setupinformation.applicationbase+"\ \  MyLog.log ");
44. Wlog. WriteLine ("error file:" + E.fullpath + "Cause:" + ex.)  ToString ());
46. Wlog. Flush ();
48. Wlog. Close ();  return null;
50. }
54. }

[Go]. NET reads the PDF text