Unable to zip and encrypt 100 MB file

Question

    using (ZipArchive zip = new ZipArchive(ZipFilePath, ArchiveOpenMode.Create))
    {
        // Set the Password first
        zip.Password = strUserPIN;

        // Change the default Encryption algorithm 
        zip.EncryptionAlgorithm = useAes256EncryptionForWinZip == "YES" ?
            Rebex.IO.Compression.EncryptionAlgorithm.Aes256 : Rebex.IO.Compression.EncryptionAlgorithm.Zip20;


        // Add the file to newly created "files" folder within the zip file
        zip.AddFile(Temp_BPI_SaveLocation + strDataFileWithTimeStamp, @"\files\");

        //Save the Zip file
        zip.Save();

        // cloase the zip file
        zip.Close();

    }

Answer 1

// Add the file to newly created "files" folder within the zip file
using (var file = File.OpenRead(Temp_BPI_SaveLocation + strDataFileWithTimeStamp))
{
    Console.WriteLine("Adding file of size: {0} starting at position: {1}.", file.Length, file.Position);
    var result = zip.AddFile(file, @"\files\" + strDataFileWithTimeStamp);
    Console.WriteLine("Added file of size: {0} ended at position: {1}.", file.Length, file.Position);
    Console.WriteLine("Result: {0}, {1}, {2}.", result.FilesAffected, result.FilesCompressedLength, result.FilesUncompressedLength);

    var item = zip[@"\files\" + strDataFileWithTimeStamp];
    if (item == null)
        Console.WriteLine("File not found in the Zip file.");
    else
        Console.WriteLine("Zip file lengths: {0}, {1}.", item.CompressedLength, item.Length);
}

Adding file of size: 181102014 starting at position: 0.
Added file of size: 181102014 ended at position: 181102014.
Result: 1, 180479584, 181102014.
Zip file lengths: 180479584, 181102014.

Comments

Thank you very much for your comment

Here is the output

Adding file of size: 103968768 starting at position: 0.
Added file of size: 103968768 ended at position: 103968768.
Result: 1, 135015, 103968768.
Zip file lengths: 135015, 103968768

Here is the version we use

Runtime version: v4.0.30319
Version: 2.0.6083.0

Thank you very much in advance

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From the output it seems that the file was read completely.
Also, it seems that the file is present in the ZIP archive and has non-empty length.

Can you please verify that the file in the ZIP file is non-empty and can be extracted from the archive?

Can you please also try to extract the file programmatically using the following code?

    using (ZipArchive zip = new ZipArchive(ZipFilePath, ArchiveOpenMode.Open))
    {
        zip.Password = strUserPIN;

        var ms = new MemoryStream();
        zip.ExtractFile(@"\files\" + strDataFileWithTimeStamp, ms);

        Console.WriteLine("Length of extracted file: {0}", ms.Length);
    }

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Actually, it works!!! Thank you very much, you guys are the best!

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Nice. So we have a working workaround, but the original issue seems to be still present.
Can you please help us to find out what is happening?

The version 2.0.6083.0 you are using is 4 years old, so it is possible that the issue is already solved. Unfortunately, I am not able to reproduce the issue with the 2.0.6083.0 version nor the latest version.

Can you please try the similar as before, but now use the original call: zip.AddFile(Temp_BPI_SaveLocation + strDataFileWithTimeStamp, @"\files\").

The test code should look like this:

    // Add the file to newly created "files" folder within the zip file
    var result = zip.AddFile(Temp_BPI_SaveLocation + strDataFileWithTimeStamp, @"\files\");
    Console.WriteLine("Result: {0}, {1}, {2}.", result.FilesAffected, result.FilesCompressedLength, result.FilesUncompressedLength);

    var item = zip[@"\files\" + strDataFileWithTimeStamp];
    if (item == null)
        Console.WriteLine("File not found in the Zip file.");
    else
        Console.WriteLine("Zip file lengths: {0}, {1}.", item.CompressedLength, item.Length);

What is the program output now?
Are you able to extract the file or is it empty?
Are you able to extract the file programmatically as mentioned before?

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Hey Lukas, I will do this exercise when I come back from vacation next week

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Thank you, we very appreciate it.