How do i compress and extract a JAR file in Visual basic 2010

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Sergey Alexandrovich Kryukov · Accepted Answer · 2013-02-19T11:13:00

Solution 1

JAR file is actually ZIP. If your question is just about compressing, you can use one of the two open-source solutions:

You can use #ziplib:
http://www.icsharpcode.net/opensource/sharpziplib/[^].

Another option is using SevenZipSharp, a .NET wrapper of the famous 7-Zip:
http://en.wikipedia.org/wiki/7-Zip[^],
http://sevenzipsharp.codeplex.com/[^].

—SA

Posted 19-Feb-13 11:13am

Sergey Alexandrovich Kryukov

Comments

Menno van Leeuwen 19-Feb-13 17:55pm

I tried to use SevenZipSharp.dll but it returns this error : Can not load 7-zip libary or internal COM error! Message: libary is inavlid. What should I do?

Sergey Alexandrovich Kryukov 19-Feb-13 18:02pm

Did you use SevenZipSharp? How did you reference it? Do you actually have 7-zip itself? It is properly installed? Try to have all executable modules in one directory...
—SA

Menno van Leeuwen 19-Feb-13 18:53pm

As you said before JAR is actually zip then this : http://www.codeproject.com/Tips/257193/Easily-zip-unzip-files-using-Windows-Shell32
should also work right?

Sergey Alexandrovich Kryukov 19-Feb-13 19:04pm

Hopefully. I never tried. What to try yourself?
—SA

Menno van Leeuwen · Accepted Answer · 2013-02-19T13:19:00

I solved the question after a bit of help from Sergey Alexandrovich Kryukov.
He said that JAR Files are the same as ZIP so I used this code to extract my JAR.

VB

Dim cur As String = (Environment.CurrentDirectory)
       Dim MC_JAR As String = install_path.Text & "\bin\minecraft.jar"
       Dim TEMP_FOLDER As String = cur & "\Install_Data\temp\minecraft.zip"
       System.IO.File.Copy(MC_JAR, TEMP_FOLDER)
       Dim sc_1 As New Shell32.Shell()
       Dim output_1 As Shell32.Folder = sc_1.NameSpace(cur & "\Install_Data\temp")
       Dim input_1 As Shell32.Folder = sc_1.NameSpace(cur & "\Install_Data\temp\minecraft.zip")
       output_1.CopyHere(input_1.Items, 4)
       System.IO.File.Delete(cur & "\Install_Data\temp\minecraft.zip")
       MsgBox("Disassemble complete!")

This code copys the jar to a temp folder and it will copy it as a zip file then it will extract all data from the zip and it will remove the zip file and give the user a message that it is done.