Implement ZIP in Unity3.0

Questions & Answers
1

Hi all,

In order to unzip a zip file from my unity script
I did the following :

  1. from DotNetZip (http://dotnetzip.codeplex.com) i got the Ionic.zip.dll and put it the assets folder.

  2. write the following code:

     var options:Ionic.Zip.ReadOptions = new Ionic.Zip.ReadOptions();
 options.Encoding = System.Text.Encoding.GetEncoding("utf-8");
 
 var  zip:Ionic.Zip.ZipFile = new Ionic.Zip.ZipFile.Read(fileName,options);
 
 
 zip.ExtractAll(Application.persistentDataPath + "/",Ionic.Zip.ExtractExistingFileAction.OverwriteSilently);

  3. Works when i run it from Unity.

  4. When build it & run it as test.exe I got an “IBM437 codepage not supported”

    ArgumentException: Encoding name ‘IBM437’ not supported

    Parameter name: name
    at System.Text.Encoding.GetEncoding (System.String name) [0x00000] in :0

    at Ionic.Zip.ZipFile…cctor () [0x00000] in :0
    Rethrow as TypeInitializationException: An exception was thrown by the type initializer for Ionic.Zip.ZipFile
    at connectUnzip+$Start$1+$.MoveNext () [0x00000] in :0

Any idea whats is happening?
Do we have an alternative on how to unzip files ?
Is it possible to have a cross platform solution ?

2

Found a dirty solution on the forums:

copy all I8N*.dll from Unity installation C:\Program Files\Unity\Editor\Data\Mono\lib\mono\unity
to the Assets folder of your project.

The question is why all these workarounds for an uzip?
Does this solution applies for non windows platforms? (Ndroid, MacOS, etc)

3

it is because some dependency dll files are missing from unity’s build. Navigate to: C:Program Files (x86)/Unity/Editor/Data/Mono/lib/mono/unity and copy all of the I18N.dlls. This will fix any incompatability issues