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Zip and Unzip from a C# program using J# runtime

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25 Apr 2004CPOL 272.2K   3.6K   47   42
Zip and Unzip from a C# program using java.util.zip

Introduction

There are a lot of libraries to work with zip files. I found a very easy way to work with zip files from a C# program. The Microsoft .Net Framework 1.1 comes with new language: J#. Let's look at it a little. For sure, Java is a parent of it; if so, java.util.zip is somewhere here! I spent a few minutes and found it in vjslib.dll. Let's do the work. Start a new C# project and select Windows Application. Our goal is something like that:

Image 1

All we need to do is: add reference to our project:

Image 2

Now, we can use it:

C#
// Output stream 
java.io.FileOutputStream fos = new java.io.FileOutputStream(zipFileName); 

// Tie to zip stream 
java.util.zip.ZipOutputStream zos = new java.util.zip.ZipOutputStream(fos); 

// Stream with source file 
java.io.FileInputStream fis = new java.io.FileInputStream(sourceFile); 

// It's our entry in zip 
java.util.zip.ZipEntry ze = new java.util.zip.ZipEntry(sourceFile); 

zos.putNextEntry(ze); 
sbyte[] buffer = new sbyte[1024]; 
int len; 

// Read and write until done 
while((len = fis.read(buffer)) >= 0) 
{ 
    zos.write(buffer, 0, len); 
}
 
// Close everything 
zos.closeEntry(); 
fis.close(); 
zos.close(); 
fos.close(); 

Conclusion

That's all! Demo application is included.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Software Developer
Russian Federation Russian Federation
Over 12 years of experience as a Software Developer/Engineer, development and production support applications for MS DOS, MS Windows.
Certified C Programmer
Certified C++ Programmer
Certified Visual FoxPro Programmer
Certified C# Programmer

Comments and Discussions

 
QuestionWhat about cyrillics? Pin
chien-andalou16-Jul-09 5:32
chien-andalou16-Jul-09 5:32 
GeneralHanging onto corrupt file Pin
terry summers22-Mar-09 10:16
terry summers22-Mar-09 10:16 
Questionunzipped progress status Pin
byteway2-Oct-07 21:38
byteway2-Oct-07 21:38 
QuestionUnzip file stored in database Pin
mikebiro1-Oct-07 12:11
mikebiro1-Oct-07 12:11 
QuestionCan I zip without folder structure? Pin
jupinno_ys15-Aug-07 21:57
jupinno_ys15-Aug-07 21:57 
AnswerRe: Can I zip without folder structure? Pin
PranaySharma8427-Aug-07 3:55
PranaySharma8427-Aug-07 3:55 
GeneralProblem in unzip Pin
hamidreza Talebi7-Aug-07 1:18
hamidreza Talebi7-Aug-07 1:18 
QuestionSize of Zipped File Pin
kyreddy26-Jun-07 4:00
kyreddy26-Jun-07 4:00 
Generalzip files with password Pin
Member 112974824-Feb-07 2:21
Member 112974824-Feb-07 2:21 
GeneralRe: zip files with password Pin
Valeri Makarov18-Apr-07 19:47
Valeri Makarov18-Apr-07 19:47 
GeneralRe: zip files with password Pin
amit_2006_it@yahoo.com6-Jun-07 9:05
amit_2006_it@yahoo.com6-Jun-07 9:05 
GeneralRe: zip files with password Pin
Valeri Makarov7-Jun-07 7:13
Valeri Makarov7-Jun-07 7:13 
QuestionHow to unzip password protected zip files? Pin
sakthivenkatesh22-Feb-07 13:04
sakthivenkatesh22-Feb-07 13:04 
AnswerRe: How to unzip password protected zip files? Pin
Valeri Makarov18-Apr-07 19:53
Valeri Makarov18-Apr-07 19:53 
GeneralGood job Pin
joachimj6-Dec-06 23:52
joachimj6-Dec-06 23:52 
QuestionHow can we unzip password-protected files. Pin
Anjum Rizwi26-Nov-06 19:56
Anjum Rizwi26-Nov-06 19:56 
QuestionIs it possible to read in the middle of the zip file? Pin
shultas30-Aug-06 15:52
shultas30-Aug-06 15:52 
AnswerRe: Is it possible to read in the middle of the zip file? Pin
Valeri Makarov30-Aug-06 20:21
Valeri Makarov30-Aug-06 20:21 
GeneralRe: Is it possible to read in the middle of the zip file? Pin
shultas31-Aug-06 11:19
shultas31-Aug-06 11:19 
GeneralZip Folder qithin a zip folder Pin
M Ali Raza5-Apr-06 21:02
M Ali Raza5-Apr-06 21:02 
GeneralProblem In Latin FileNames Pin
dealarconjose15-Mar-06 1:03
dealarconjose15-Mar-06 1:03 
GeneralAlternative (with code) Pin
Elmue21-Nov-05 0:41
Elmue21-Nov-05 0:41 
GeneralWhat about multiple folders? Pin
dragomir22-Dec-05 0:54
dragomir22-Dec-05 0:54 
GeneralRe: What about multiple folders? Pin
Elmue31-Dec-05 1:53
Elmue31-Dec-05 1:53 
GeneralRe: What about multiple folders? Pin
wyattda17-Jan-06 17:36
wyattda17-Jan-06 17:36 

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