ZipArchive.TestArchive(true) fails after using IO.Compression.ZipFile.CreateFromDirectory() on an Folder with several small textfiles

Steps to reproduce

1. Use the files in the attached zip to create an zip file using ZipFile.CreateFromDirectory() from the namespace System.Io.Compression.
2. Create a new ZipArchive-Object and test it using TestArchive. ZipFile zipFile = new ZipFile(pathToZipFile); bool success = zipFile.TestArchive(true); zipFile.Close();
3. Check the return value.

Expected behavior

The return value should be true because it is a proper archive file.

Actual behavior

The return value is always false.

It turns out that, if I use SharpZibLib to generate the archive (which is not an option for the problem I’m working on), TestArchive returns true. It also succeeds, if I only put an database file of the size of ~500kb into the archive. But if I then add File1.txt and Subfolder1\Subfile2.txt (from Testfiles.zip), it returns false again.

Version of SharpZipLib

v1.1.0.145

Obtained from (only keep the relevant lines)

• Package installed using NuGet

Testfiles.zip

[Kalkihe]

Thanks for your hint. I took another look and realized, I took the wrong version. Actually, I’m using version 1.1.0.145, which obviously is quiet outdated. In that project, it isn’t referenced as nuget paket as I first thought, so I’m going to fix that issue.

I tried it out in a new project using the current nuget package alongside the same data. This works pretty well, so updating the package should solve the issue.

Thanks for your help.

[piksel]

You can get the errors by supplying a logging callback to the method:

new ZipFile(archiveStream).TestArchive(true, TestStrategy.FindAllErrors, (status, message) =>
{
    if (status.Operation == TestOperation.EntryData) return;
    var pad = "";
    if (status.Entry is { } entry)
    {
        PrettyConsole.WriteLine($"[{status.Operation}{pad}] #{entry.ZipFileIndex} {entry.Name}");
    }
    else
    {
        PrettyConsole.WriteLine($"[{status.Operation}{pad}]");
    }

    if (!string.IsNullOrEmpty(message))
    {
        PrettyConsole.WriteLine($"[{status.Operation}{pad}] {message}");
    }
});

(this is from the tests done in ArchiveDiag, which actually returns true for the file).

Version of SharpZipLib v4.0.30319

That’s not an official SharpZipLib version… maybe you are using a fork?