Comments on System.What?: Windows XP Unzip Errors With SharpZipLib

Thank is exactly what i was looking for. Th...

2011-10-16T17:30:28.576-07:00

Thank is exactly what i was looking for. Thanks a lot.

How is that a "solution"? Use the 7-zip...

2011-07-18T17:42:17.032-07:00

How is that a "solution"?

Use the 7-zip option to avoid having Zip64 used on <4gb files... which XP doesn't have a problem with anyway.

If the file is >4gb, Windows can't open them anyway... with Zip64 or not.

Doesn't that mean it won't work either way?

Thanks ... because you helped a lot, but a more co...

2011-07-08T02:37:33.626-07:00

Thanks ... because you helped a lot, but a more correct answer to this kind of problem is to simply turn zip64 off, like this:
zipOutput.UseZip64 = UseZip64.Off;

You rock, completely solved my problem. I am zipp...

2010-11-05T11:11:19.153-07:00

You rock, completely solved my problem. I am zipping in C#, unzipping in Java, which was error'ing out with "invalid entry size (expected 4294967295 but got xxx bytes)" before your fix.

Thank you!

That works for me: private void ZipFiles(string s...

2010-02-26T14:31:24.552-08:00

That works for me:
private void ZipFiles(string sActivityType, bool bPrintedOnly)
{
List filesNames_Guid = GenerateFilesList(sActivityType, bPrintedOnly);

Guid filename = Guid.NewGuid();

FileStream ostream;
byte[] obuffer;
//generic and unique name for the zipped file, needs to be removed afterwards
string outPath = Server.MapPath("~/TMP") + @"\" + filename.ToString() + ".zip";
ZipOutputStream oZipStream = new ZipOutputStream(System.IO.File.Create(outPath)); // create zip stream
//oZipStream.UseZip64 = UseZip64.Off;
ZipEntry oZipEntry;

for (int i = 0; i < filesNames_Guid.Count - 1; i = i + 2)
{
oZipEntry = new ZipEntry(filesNames_Guid[i]);

// start of the fix.
FileInfo MyFileInfo = new FileInfo(Server.MapPath("~/ArtifactLibrary") + "\\" + filesNames_Guid[i + 1]);
oZipEntry.DateTime = MyFileInfo.CreationTime;
oZipEntry.Size = MyFileInfo.Length;
// end of the fix.
oZipStream.PutNextEntry(oZipEntry);
ostream = System.IO.File.OpenRead(Server.MapPath("~/ArtifactLibrary") + "\\" + filesNames_Guid[i + 1]);
obuffer = new byte[ostream.Length];
ostream.Read(obuffer, 0, obuffer.Length);
oZipStream.Write(obuffer, 0, obuffer.Length);
ostream.Close();
}
oZipStream.Finish();

HttpContext.Current.Response.AddHeader("Content-Disposition", ("attachment; filename=" + ViewState["Name_Selected"] + " " + sActivityType + (bPrintedOnly ? " PrintedOnly" : "") + ".zip"));
HttpContext.Current.Response.AddHeader("Content-Length", oZipStream.Length.ToString());
HttpContext.Current.Response.ContentType = "application/octet-stream";

oZipStream.Close();

HttpContext.Current.Response.TransmitFile(outPath);

}

Thanks, your comment was very useful.

2010-02-05T02:20:13.357-08:00

Thanks, your comment was very useful.

This solved my problem! I was wondering myself why...

2009-10-30T07:40:05.301-07:00

This solved my problem! I was wondering myself why it wouldn't open with the XP compressed folders. I have WinZip installed and it wasn't a problem.

Thanks!

Still not correct. This is a bug in SharpZipLib

2009-09-22T00:49:20.291-07:00

Still not correct. This is a bug in SharpZipLib

Thank you. This is also the workaround for the err...

2009-09-02T01:28:00.277-07:00

Thank you.
This is also the workaround for the error if you add an empty file (0 bytes) via SharpZipLib 0.85.5 to an ZIP archive. WinZip 10.0 consider this files as invalid: "Error: invalid compressed data to inflate".

Thank you for this post.
Tom

Very nice, would have taken me forever to fix this...

2009-04-24T04:29:00.000-07:00

Very nice, would have taken me forever to fix this error. Thanks!

Excellent post, thanks for the info!

2009-03-15T22:12:00.000-07:00

Excellent post, thanks for the info!

Thank You for this post!

2009-01-22T02:42:00.000-08:00

Thank You for this post!

The timing of this post was great. I had a web ap...

2008-12-12T20:30:00.000-08:00

The timing of this post was great. I had a web app using the SharpZipLib code and had no issues using my current Winzip or 7-zip.

Users with Winzip 8.0, Freezip, and the XP Compressed Folders were encountering problems. What I noticed was if I opened the old zip file with XP Compressed Folders, it would display both the packed size and original size as 4Gb which certainly coincides with the Zip64 comment.