Zip file on Mac usingICSharp

Question

I am using mono and monobjc to develop an application to run on Mac OS X 10.6. I am adding some files to a zip file using ICSharpCode.SharpZip. The code is as -

var ms = new MemoryStream();
var zipStream = new ZipOutputStream(ms); 
zipStream.PutNextEntry(new ZipEntry(Path.GetFileName(file))
         {DateTime = File.GetCreationTime(file), 
          Size = new FileInfo(file).Length});

Sometimes, not always, The PutNewEntry code throws the following exception -

System.NotSupportedException: CodePage 437 not supported at System.Text.Encoding.GetEncoding (Int32 codepage) [0x00000] in :0 at ICSharpCode.SharpZipLib.Zip.ZipConstants.ConvertToArray (System.String str) [0x00000] in :0 at ICSharpCode.SharpZipLib.Zip.ZipConstants.ConvertToArray (Int32 flags, System.String str) [0x00000] in :0 at ICSharpCode.SharpZipLib.Zip.ZipOutputStream.PutNextEntry (ICSharpCode.SharpZipLib.Zip.ZipEntry entry) [0x00000] in :0 at (wrapper remoting-invoke-with-check) ICSharpCode.SharpZipLib.Zip.ZipOutputStream:PutNextEntry (ICSharpCode.SharpZipLib.Zip.ZipEntry)

I have the following two questions -

What is the causing the above exception.
It looks like ICSharp may not be the best option. What are the better alternatives?.

Have you tried to isolate and run the same code from a console application ? Does the error appear ? — Laurent Etiemble, May 20 '11 at 08:27
@Laurent - I tried this twice and it works fine. Also as I said this does not happen always, it happens sometimes. — Prashant, May 20 '11 at 15:19

score 0 · Accepted Answer · answered May 31 '11 at 16:37

I fixed this by creating a tar.gzip instead of using zip. I used ICSharp itself to create the tar file. Mac does not seem to like zip. It could also be because I was using the ICSharp in Mono framework on Mac side and using ICSharp(download from the web) on the windows side. But using tar.gzip resolved this issue.

Zip file on Mac usingICSharp

1 Answers1