[ { "Id": "175065", "ThreadId": "52132", "Html": "Hello,
\r\nI'm testing your Ionic.Zip.dll v1.7 in vs2005
\r\nI added it to my web app and added a reference to it. Then tested creating a zip file, which worked.
\r\nThen I attempted to extract the recently created zip file, and I got an error.
\r\n
\r\nThe inner exception message is: "Could not read signature - no data! (position 0x0006A9E4)"
\r\nat Ionic.Zip.SharedUtilities._ReadFourBytes(Stream s, String message)
\r\nat Ionic.Zip.SharedUtilities.ReadSignature(Stream s)
\r\nat Ionic.Zip.SharedUtilities.FindSignature(Stream stream, Int32 SignatureToFind)
\r\nat Ionic.Zip.ZipFile.ReadIntoInstance(ZipFile zf)
\r\nat Ionic.Zip.ZipFile.Read(String zipFileName, TextWriter statusMessageWriter, Encoding encoding, EventHandler`1 readProgress)
\r\n
\r\nThanks for your input\r\n", "PostedDate": "2009-04-02T17:14:40.663-07:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "175070", "ThreadId": "52132", "Html": "Can you show me the code?\r\n", "PostedDate": "2009-04-02T17:40:29.027-07:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "175342", "ThreadId": "52132", "Html": "Yeah. I added compress and extract functions to a .cs file, then called those from a .js file when clicking a "Compress" button and an "Extract" button:
\r\n
\r\nJS CALL:
\r\n\r\n

else if (btnPrs == "TST_COMPRESS")
\r\n{
\r\n    Ama.Gol.Diagram.DiagramImport.TstZipCompress();
\r\n}
\r\nelse if (btnPrs == "TST_EXTRACT")
\r\n{
\r\n    Ama.Gol.Diagram.DiagramImport.TstZipExtract();
\r\n}
\r\n
\r\nCS f(x)s:
\r\n
\r\npublic static void TstZipCompress()
\r\n{
\r\n    using (ZipFile zip = new ZipFile())
\r\n   {
\r\n        zip.AddItem(@"C:\\Windows\\Explorer.exe", @"FileManager\\Explorer.exe");
\r\n        zip.AddItem(@"C:\\Windows\\Notepad.exe",@"TextManager\\Notepad.exe");
\r\n        zip.Comment = "This zip was created at " + System.DateTime.Now.ToString("G");
\r\n        zip.Save(@"C:\\Temp\\Packed.zip");
\r\n    }
\r\n}
\r\n
\r\npublic static void TstZipExtract()
\r\n{
\r\n    using (ZipFile zip = ZipFile.Read(@"C:\\Temp\\Packed.zip"))
\r\n    {
\r\n         foreach (ZipEntry e in zip)
\r\n         {
\r\n                e.Extract(@"C:\\Temp", true);    // overwrite == true
\r\n         }
\r\n    }
\r\n}
\r\n
\r\nRegards

\r\n

 

\r\n\r\n", "PostedDate": "2009-04-03T09:55:10.93-07:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "175379", "ThreadId": "52132", "Html": "The code looks fine.  Pretty basic. I would expect it to work as you want it to.
\r\n
\r\nwhat specific version of 1.7 - do you have the latest?
\r\nIs this reproducible? Does it happen every time?  Have you ever been able to read or extract a zip file?
\r\nhow does the javascript call the C#?  
\r\nDoes it matter what you put into the zip file? What if you added different files instead of explorer and notepad.exe?
\r\nDoes it happen outside the web app?  If you put the same code in a console app, does the same problem occur? \r\n", "PostedDate": "2009-04-03T11:03:42.443-07:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "175468", "ThreadId": "52132", "Html": "Version I used in my web app: v1.7 packed Wed-03-04-2009--00924.41.
\r\nFirst time I attempt to read/extract a zip file. Have been able to compress/extract cab files with another library that did not convince me due to deployment issues.
\r\nJavascript instantiated within an aspx page, when clicking a button. C# compiled into a dll in my solution.
\r\nI tested with .doc files too. Compression works, extraction fails.
\r\n
\r\nI also tested w/a sample exe that comes in the DotNetZip utilities and tools, for DotNetZip v1.7.  (Packed Wed-03-04-2009--00924.41.).
\r\nPlaced the unzip.exe and the .dll that came in that zip file, in the same c:\\temp where I successfully compressed the files.
\r\nFailed to extract both zips, the one with the exe files and the one with the doc files.
\r\n
\r\nSame error message:
\r\nC:\\Temp>unzip packed.zip -o
\r\nexception: Ionic.Zip.ZipException: packed.zip is not a valid zip file ---> Ionic.Zip.BadReadException: Could not read signature - no data!  (position 0x0006A9E4)
\r\n   at Ionic.Zip.SharedUtilities._ReadFourBytes(Stream s, String message)
\r\n   at Ionic.Zip.SharedUtilities.ReadSignature(Stream s)
\r\n   at Ionic.Zip.SharedUtilities.FindSignature(Stream stream, Int32 SignatureToFind)
\r\n   at Ionic.Zip.ZipFile.ReadIntoInstance(ZipFile zf)
\r\n   at Ionic.Zip.ZipFile.Read(String zipFileName, TextWriter statusMessageWriter, Encoding encoding, EventHandler`1 readProgress)
\r\n   --- End of inner exception stack trace ---
\r\n   at Ionic.Zip.ZipFile.Read(String zipFileName, TextWriter statusMessageWriter, Encoding encoding, EventHandler`1 readProgress)
\r\n   at Ionic.Zip.ZipFile.Read(String zipFileName, TextWriter statusMessageWriter, Encoding encoding)
\r\n   at Ionic.Zip.ZipFile.Read(String zipFileName)
\r\n   at Ionic.Zip.Examples.UnZip.Main(String[] args)
\r\n
\r\nRegards\r\n", "PostedDate": "2009-04-03T14:01:50.947-07:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "184651", "ThreadId": "52132", "Html": "Ok, what I am seeing on this is that normal efforts to unzip a file are failing.
\r\nThe most likely explanation is that the zipfile is corrupted or not correct.
\r\nCan you show me how you created the zip file?
\r\nor post the zipfile somewhere?
\r\n", "PostedDate": "2009-04-28T11:56:21.983-07:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "184851", "ThreadId": "52132", "Html": "i have the same problem
\r\n
\r\non the production machine all goes ok, on the target machine (windows server 2008) the extraction fail (with the same .zip file).
\r\n
\r\nfound the solution! using the release compilation solve the problem!
\r\n
\r\nbefore i use debug compilation and with this not function on target machine.
\r\n
\r\nhope this help
\r\n", "PostedDate": "2009-04-29T00:37:38.01-07:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "185182", "ThreadId": "52132", "Html": "newToVs, the problem you reported was due to a bug in DotNetZip.
\r\nsee http://dotnetzip.codeplex.com/WorkItem/View.aspx?WorkItemId=7711
\r\n
\r\nThe workaround is to append four (4) space characters to the end of the zipfile comment.
\r\nYou can also upgrade to v1.7.2.13 which will avoid the problem.
\r\n
\r\nFastlink, I am not sure what your problem was/is.  But it seems you addressed it, so I won't worry about it further.\r\n", "PostedDate": "2009-04-29T12:49:07.807-07:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "188285", "ThreadId": "52132", "Html": "

Thank you for taking the time to look at this. I have paused my research on file compression/extraction for now -work overload- but will dowload v1.7.2.13 when I continue with it.

\r\n

Regards

", "PostedDate": "2009-05-08T13:24:51.603-07:00", "UserRole": null, "MarkedAsAnswerDate": null } ]