Zip subfolders using ZipOutputStream

Question

ZipOutputStream only zips files in a folder. I want to zip subfolders also. How can I achieve this?

Answer 1

public static void ZipDirectoryKeepRelativeSubfolder(string zipFilePath, string directoryToZip)
{
    var filenames = Directory.GetFiles(directoryToZip, "*.*", SearchOption.AllDirectories);
    using (var s = new ZipOutputStream(File.Create(zipFilePath)))
    {
        s.SetLevel(9);// 0 - store only to 9 - means best compression

        var buffer = new byte[4096];

        foreach (var file in filenames)
        {
            var relativePath = file.Substring(directoryToZip.Length).TrimStart('\\');
            var entry = new ZipEntry(relativePath);
            entry.DateTime = DateTime.Now;
            s.PutNextEntry(entry);

            using (var fs = File.OpenRead(file))
            {
                int sourceBytes;
                do
                {
                    sourceBytes = fs.Read(buffer, 0, buffer.Length);
                    s.Write(buffer, 0, sourceBytes);
                } while (sourceBytes > 0);
            }
        }
        s.Finish();
        s.Close();
    }
}