Liam Westley

do you know how i can repair a zipfile with this lib?

Juan,

I haven't used the library to do this I've actually never had a corrupt ZIP file, so have not needed to investigate this area.

I use buffered input and output so that will work with large files as well:
(note, this is a part of MSBuild task, so I keep the function unchanged )

private bool ZipFiles()
{
Crc32 crc = new Crc32();
ZipOutputStream zs = null;

try
{
Log.LogMessage(MSBuild.Community.Tasks.Properties.Resources.ZipCreating, _zipFileName);

using (zs = new ZipOutputStream(File.Create(_zipFileName)))
{

// make sure level in range
_zipLevel = System.Math.Max(0, _zipLevel);
_zipLevel = System.Math.Min(9, _zipLevel);

zs.SetLevel(_zipLevel);
if (!string.IsNullOrEmpty(_comment))
zs.SetComment(_comment);

byte[] buffer = new byte[32768];
// add files to zip
foreach (ITaskItem fileItem in _files)
{
string name = fileItem.ItemSpec;
FileInfo file = new FileInfo(name);
if (!file.Exists)
{
Log.LogWarning(MSBuild.Community.Tasks.Properties.Resources.FileNotFound, file.FullName);
continue;
}

// clean up name
if (_flatten)
name = file.Name;
else if (!string.IsNullOrEmpty(_workingDirectory)
&& name.StartsWith(_workingDirectory, true, CultureInfo.InvariantCulture))
name = name.Remove(0, _workingDirectory.Length);

name = ZipEntry.CleanName(name, true);

ZipEntry entry = new ZipEntry(name);
entry.DateTime = file.LastWriteTime;
entry.Size = file.Length;

using (FileStream fs = file.OpenRead())
{
crc.Reset();
long len = fs.Length;
while (len > 0)
{
int readSoFar = fs.Read(buffer, 0, buffer.Length);
crc.Update(buffer, 0, readSoFar);
len -= readSoFar;
}
entry.Crc = crc.Value;
zs.PutNextEntry(entry);

len = fs.Length;
fs.Seek(0, SeekOrigin.Begin);
while (len > 0)
{
int readSoFar = fs.Read(buffer, 0, buffer.Length);
zs.Write(buffer, 0, readSoFar);
len -= readSoFar;
}
}
Log.LogMessage(MSBuild.Community.Tasks.Properties.Resources.ZipAdded, name);
} // foreach file
zs.Finish();
}
Log.LogMessage(MSBuild.Community.Tasks.Properties.Resources.ZipSuccessfully, _zipFileName);
return true;
}
catch (Exception exc)
{
Log.LogErrorFromException(exc);
return false;
}
finally
{
if (zs != null)
zs.Close();
}
}

If we just read the whole file buffer in memory this will cause the exceptions in some cases - smth about insufficient memory resources per process domain.

Thank you so much. That was exactly the problem I was having. P.S. What is the reason for the ZipFileIndex?

Thank you for this!

I used this lines of code...

If Not File.Exists(FileName) Then
outputStrm = New ZipOutputStream(File.Create(FileName))
Else
outputStrm = New ZipOutputStream(File.Open(FileName, FileMode.Truncate))
End If

and the FileName is C:\download\zip\zipfile.zip


But i am getting this error:
Could not find a part of the path "C:\download\zip\zipfile.zip".


Doesn't the above lines of code create this file path for me if it not existing? Because i am getting this error if i dont have C:\download\zip in my directory....but when i physically create C:\download\zip....the code runs smoothly...

Any idea on what i should do?

Thanks in advance

In the MSDN help it describes the File.Create method as;

Creates a file in the *specified path*.

I would guess it only creates the file, not the entire path if it does not already exist. So it's working exactly as expected I'm afraid.

Many thanks Oleg for the code!
-lindinho

Anyone know how to add the password?
my code below:

crc = new Crc32();
zip = new ZipOutputStream(File.Create(destDir));
zip.SetLevel(zipLevel);
if (zipPass != string.Empty)
zip.Password = zipPass;

but it doesn't work.

thanks for this help......

I've tried to set password and it's works fine:
code:

crc = new Crc32();
zip = new ZipOutputStream(File.Create(destDir));
zip.SetLevel(zipLevel);

zip.Password = "testPassword";

Thanks a lot for the post. I had this issue that the zipped file were blocked by all the email clients. All email clients detected it to be a virus. Your post helped me fix it.

Hello, I want to password protext the zip files. Writing the fol. line of code :

zip.Password = "123456";

gives me a dialog to enter password when I unzip. But it gives error that the password is incorrent evenif I enter the right password.

Why it is so ?

Great code, thanks for sharing.