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

, 25 Apr 2004 CPOL 206.1K 3.2K 47
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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:

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

Now, we can use it:

// 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)

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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 6:32
memberchien-andalou16-Jul-09 6:32 
GeneralHanging onto corrupt file Pin
terry summers22-Mar-09 11:16
memberterry summers22-Mar-09 11:16 
Questionunzipped progress status Pin
byteway2-Oct-07 22:38
memberbyteway2-Oct-07 22:38 
QuestionUnzip file stored in database Pin
mikebiro1-Oct-07 13:11
membermikebiro1-Oct-07 13:11 
QuestionCan I zip without folder structure? Pin
jupinno_ys15-Aug-07 22:57
memberjupinno_ys15-Aug-07 22:57 
AnswerRe: Can I zip without folder structure? Pin
PranaySharma8427-Aug-07 4:55
memberPranaySharma8427-Aug-07 4:55 
GeneralProblem in unzip Pin
hamidreza Talebi7-Aug-07 2:18
memberhamidreza Talebi7-Aug-07 2:18 
QuestionSize of Zipped File Pin
kyreddy26-Jun-07 5:00
memberkyreddy26-Jun-07 5:00 
Generalzip files with password Pin
Member #112974824-Feb-07 3:21
memberMember #112974824-Feb-07 3:21 
GeneralRe: zip files with password Pin
Valeri18-Apr-07 20:47
memberValeri18-Apr-07 20:47 
GeneralRe: zip files with password Pin
amit_2006_it@yahoo.com6-Jun-07 10:05
memberamit_2006_it@yahoo.com6-Jun-07 10:05 
GeneralRe: zip files with password Pin
Valeri7-Jun-07 8:13
memberValeri7-Jun-07 8:13 
QuestionHow to unzip password protected zip files? Pin
sakthivenkatesh22-Feb-07 14:04
membersakthivenkatesh22-Feb-07 14:04 
AnswerRe: How to unzip password protected zip files? Pin
Valeri18-Apr-07 20:53
memberValeri18-Apr-07 20:53 
GeneralGood job Pin
joachimF7-Dec-06 0:52
memberjoachimF7-Dec-06 0:52 
QuestionHow can we unzip password-protected files. Pin
Anjum Rizwi26-Nov-06 20:56
memberAnjum Rizwi26-Nov-06 20:56 
QuestionIs it possible to read in the middle of the zip file? Pin
shultas30-Aug-06 16:52
membershultas30-Aug-06 16:52 
AnswerRe: Is it possible to read in the middle of the zip file? Pin
Valeri30-Aug-06 21:21
memberValeri30-Aug-06 21:21 
GeneralRe: Is it possible to read in the middle of the zip file? Pin
shultas31-Aug-06 12:19
membershultas31-Aug-06 12:19 
GeneralZip Folder qithin a zip folder Pin
M Ali Raza5-Apr-06 22:02
memberM Ali Raza5-Apr-06 22:02 
GeneralProblem In Latin FileNames Pin
dealarconjose15-Mar-06 2:03
memberdealarconjose15-Mar-06 2:03 
GeneralAlternative (with code) Pin
Elmue21-Nov-05 1:41
memberElmue21-Nov-05 1:41 
GeneralWhat about multiple folders? Pin
dragomir22-Dec-05 1:54
memberdragomir22-Dec-05 1:54 
GeneralRe: What about multiple folders? Pin
Elmue31-Dec-05 2:53
memberElmue31-Dec-05 2:53 
GeneralRe: What about multiple folders? Pin
wyattda17-Jan-06 18:36
memberwyattda17-Jan-06 18:36 
GeneralRe: Alternative (with code) Pin
chris1755-Dec-06 5:49
memberchris1755-Dec-06 5:49 
GeneralAble to zip directories and their contents Pin
nicholaskeytholeong26-Aug-05 20:01
membernicholaskeytholeong26-Aug-05 20:01 
GeneralRe: Able to zip directories and their contents Pin
obinna_eke30-May-06 2:29
memberobinna_eke30-May-06 2:29 
GeneralRe: Able to zip directories and their contents Pin
sanjayg1233-Mar-07 22:59
membersanjayg1233-Mar-07 22:59 
GeneralZipping folders and their subdirectories Pin
nicholaskey12-Aug-05 18:39
sussnicholaskey12-Aug-05 18:39 
GeneralRe: Zipping folders and their subdirectories Pin
nicholaskeytholeong12-Aug-05 18:42
membernicholaskeytholeong12-Aug-05 18:42 
GeneralThank You Pin
Seth O'Neal6-May-05 8:37
memberSeth O'Neal6-May-05 8:37 
GeneralThere is a bug in those classes Pin
Nishant S9-May-04 4:56
staffNishant S9-May-04 4:56 
GeneralRe: There is a bug in those classes Pin
Valeri9-May-04 5:28
memberValeri9-May-04 5:28 
GeneralRe: There is a bug in those classes Pin
Nishant S9-May-04 5:30
staffNishant S9-May-04 5:30 
GeneralRe: There is a bug in those classes Pin
cmhasan29-Nov-04 6:25
membercmhasan29-Nov-04 6:25 
GeneralThis actually has a problem. Pin
udaan20033-May-04 6:46
memberudaan20033-May-04 6:46 
I have used the utility. When I zip a file using this and try to unzip it with the same utility.... it throws an error (80% of the time). Would be glad if there is a fix for this.


Sharon
GeneralRe: This actually has a problem. Pin
Valeri3-May-04 8:02
memberValeri3-May-04 8:02 
GeneralRe: This actually has a problem. Pin
udaan20034-May-04 6:58
memberudaan20034-May-04 6:58 
GeneralRe: This actually has a problem. Pin
Valeri4-May-04 8:00
memberValeri4-May-04 8:00 
GeneralThis has been covered in a fair bit of detail in another article... Pin
Duncanma25-Apr-04 23:22
memberDuncanma25-Apr-04 23:22 
GeneralRe: This has been covered in a fair bit of detail in another article... Pin
Valeri25-Apr-04 23:45
memberValeri25-Apr-04 23:45 

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