Does anyone know of a way to zip files in c#. I tried using sharplib but the compression utility that comes with XP is not able to unzip the files. I need a format that can be unzipped by this and most other compression tools since I am not sure exactly what my users will be using to unzip the files.
Thanks in advance
Since you already tried SharpZip Lib, here's another way of zipping in C#. This uses a few J# Dlls.
http://msdn.microsoft.com/msdnmag/issues/03/06/zipcompression/default.aspx
Regards,
Vikram
For example, a zip file containing the following entry cannot be unzip by Windows XP:
c:\Temp\Myfile.txt
However this can:
Temp\Myfile.txt
You need to remove the root of the file name before using it in the ZipEntry, I use a function similar to this to do that:
public static string RemovePathRoot(string path) { string root = Path.GetPathRoot(path); return path.Substring(root.Length); } |
I have quite happily used SharpZipLib and Windows XP together.
Do you mean I should be specifying a relative path for the zip file to be created in?
My code is as follows but I still cant read the file using XP's compression utility:
Note: These are my command line parameters that I start the app with:
"\Documents and Settings\gbezuidenhout\My Documents\ZipTest" "\Documents and Settings\gbezuidenhout\My Documents\Zipped.zip"
string[] filenames = Directory.GetFiles(args[0]);
Crc32 crc = new Crc32();
ZipOutputStream s = new ZipOutputStream(File.Create(args[1]));
s.SetLevel(6); // 0 - store only to 9 - means best compression
foreach (string file in filenames) {FileStream fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length];fs.Read(buffer, 0, buffer.Length);
ZipEntry entry =
new ZipEntry(file);entry.DateTime = DateTime.Now;
// set Size and the crc, because the information // about the size and crc should be stored in the header // if it is not set it is automatically written in the footer. // (in this case size == crc == -1 in the header) // Some ZIP programs have problems with zip files that don't store // the size and crc in the header.entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
s.Finish();
s.Close();
For example:
This line:
ZipEntry entry = new ZipEntry(file); |
Should be changed to call my method above:
ZipEntry entry = new ZipEntry(RemovePathRoot(file)); |
Or here for more Information:
http://www.codeguru.com/Csharp/.NET/net_asp/files/article.php/c9931/
eclipse2k wrote:
In .NET 2.0 you get some new compression functionality.
Take a look at the new System.IO.Compression Namespace.Or here for more Information:
http://www.codeguru.com/Csharp/.NET/net_asp/files/article.php/c9931/
The J# solution is broke because the required assembly don't ship with .NET 2.0 beta 2. I don't want to use the sharp lib when the basic functionality is available in the framework. I wonder how hard it is to zip/unzip a folder using Sytem.IO.Compression. So far there is no sample code available, at least I didn't find any sample code.
You need to reproduce exactly what the SharpZibLib is doing anyway, so is it worth it?
I wonder how hard it is to zip/unzip a folder using Sytem.IO.Compression.
I actually use this to unzip a single file.
'Data Array contains the .zip file Dim Start, Lenght As Integer Dim UncompStream As New MemoryStream Do Until Value = -1 DataStream = UncompStream |
You can find out more amour the .ZIP file format with any RFC about it on the web (I don't remember the rfc number. Simply open google and search zip file format structure pk deflated stored)
Or.. for a MOOOOORE complete (and complex) document look here.
