c# sharpziplib adding file to existing archive

Question

am trying to add a file to an existing archive using the following code. When run no errors or exceptions are shown but no files are added to the archive either. Any ideas w

Answer 1

From Codeproject someone used this code. Only difference is close and finish otherway around and the write part:

using (ZipOutputStream s = new
ZipOutputStream(File.Create(txtSaveTo.Text + "\\" +
sZipFileName + ".zip")))
{
    s.SetLevel(9); // 0-9, 9 being the highest compression

    byte[] buffer = new byte[4096];

    foreach (string file in filenames)
    {

        ZipEntry entry = new
        ZipEntry(Path.GetFileName(file));

        entry.DateTime = DateTime.Now;
        s.PutNextEntry(entry);

        using (FileStream 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();
}

BTW:

byte[] byteBuffer = new byte[newFileStream.Length - 1];

                newFileStream.Read(byteBuffer, 0, byteBuffer.Length);

This is incorrect, the size is newFileStream.length else the Read goes wrong. You have an array and you make it for example 10-1 is 9 bytes long, from 0 to 8.

But your reading from 0 to 9...