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Posted 25 Apr 2004


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

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25 Apr 2004CPOL
Zip and Unzip from a C# program using


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, 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:

// Output stream fos = new; 

// Tie to zip stream zos = new; 

// Stream with source file fis = new; 

// It's our entry in zip ze = new; 

sbyte[] buffer = new sbyte[1024]; 
int len; 

// Read and write until done 
while((len = >= 0) 
    zos.write(buffer, 0, len); 
// Close everything 


That's all! Demo application is included.


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


About the Author

Valeri Makarov
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
Memberchien-andalou16-Jul-09 5:32 
GeneralHanging onto corrupt file Pin
terry summers22-Mar-09 10:16
Memberterry summers22-Mar-09 10:16 
Questionunzipped progress status Pin
byteway2-Oct-07 21:38
Memberbyteway2-Oct-07 21:38 
QuestionUnzip file stored in database Pin
mikebiro1-Oct-07 12:11
Membermikebiro1-Oct-07 12:11 
QuestionCan I zip without folder structure? Pin
jupinno_ys15-Aug-07 21:57
Memberjupinno_ys15-Aug-07 21:57 
AnswerRe: Can I zip without folder structure? Pin
PranaySharma8427-Aug-07 3:55
MemberPranaySharma8427-Aug-07 3:55 
GeneralProblem in unzip Pin
hamidreza Talebi7-Aug-07 1:18
Memberhamidreza Talebi7-Aug-07 1:18 
QuestionSize of Zipped File Pin
kyreddy26-Jun-07 4:00
Memberkyreddy26-Jun-07 4:00 
Generalzip files with password Pin
Member 112974824-Feb-07 2:21
MemberMember 112974824-Feb-07 2:21 
GeneralRe: zip files with password Pin
Valeri Makarov18-Apr-07 19:47
MemberValeri Makarov18-Apr-07 19:47 
GeneralRe: zip files with password Pin
amit_2006_it@yahoo.com6-Jun-07 9:05
Memberamit_2006_it@yahoo.com6-Jun-07 9:05 
GeneralRe: zip files with password Pin
Valeri Makarov7-Jun-07 7:13
MemberValeri Makarov7-Jun-07 7:13 
QuestionHow to unzip password protected zip files? Pin
sakthivenkatesh22-Feb-07 13:04
Membersakthivenkatesh22-Feb-07 13:04 
AnswerRe: How to unzip password protected zip files? Pin
Valeri Makarov18-Apr-07 19:53
MemberValeri Makarov18-Apr-07 19:53 
GeneralGood job Pin
joachimj6-Dec-06 23:52
Memberjoachimj6-Dec-06 23:52 
QuestionHow can we unzip password-protected files. Pin
Anjum Rizwi26-Nov-06 19:56
MemberAnjum Rizwi26-Nov-06 19:56 
QuestionIs it possible to read in the middle of the zip file? Pin
shultas30-Aug-06 15:52
Membershultas30-Aug-06 15:52 
AnswerRe: Is it possible to read in the middle of the zip file? Pin
Valeri Makarov30-Aug-06 20:21
MemberValeri Makarov30-Aug-06 20:21 
GeneralRe: Is it possible to read in the middle of the zip file? Pin
shultas31-Aug-06 11:19
Membershultas31-Aug-06 11:19 
GeneralZip Folder qithin a zip folder Pin
M Ali Raza5-Apr-06 21:02
MemberM Ali Raza5-Apr-06 21:02 
GeneralProblem In Latin FileNames Pin
dealarconjose15-Mar-06 1:03
Memberdealarconjose15-Mar-06 1:03 
GeneralAlternative (with code) Pin
Elmue21-Nov-05 0:41
MemberElmue21-Nov-05 0:41 
GeneralWhat about multiple folders? Pin
dragomir22-Dec-05 0:54
Memberdragomir22-Dec-05 0:54 
GeneralRe: What about multiple folders? Pin
Elmue31-Dec-05 1:53
MemberElmue31-Dec-05 1:53 
GeneralRe: What about multiple folders? Pin
wyattda17-Jan-06 17:36
Memberwyattda17-Jan-06 17:36 

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