Creating Directories in a ZipArchive C# .Net 4.5

Question

A ZipArchive is a collection of ZipArchiveEntries, and adding/removing \"Entries\" works nicely. But it appears there is no notion of directories / nested \"Archives\". In t

Answer 1

My answer is based on the Val's answer, but a little improved for performance and without producing empty files in ZIP.

public static class ZipArchiveExtensions
{
    public static void CreateEntryFromAny(this ZipArchive archive, string sourceName, string entryName = "")
    {
        var fileName = Path.GetFileName(sourceName);
        if (File.GetAttributes(sourceName).HasFlag(FileAttributes.Directory))
        {
            archive.CreateEntryFromDirectory(sourceName, Path.Combine(entryName, fileName));
        }
        else
        {
            archive.CreateEntryFromFile(sourceName, Path.Combine(entryName, fileName), CompressionLevel.Optimal);
        }
    }

    public static void CreateEntryFromDirectory(this ZipArchive archive, string sourceDirName, string entryName = "")
    {
        var files = Directory.EnumerateFileSystemEntries(sourceDirName);
        foreach (var file in files)
        {
            archive.CreateEntryFromAny(file, entryName);
        }
    }
}

Example of using:

// Create and open a new ZIP file
                using (var zip = ZipFile.Open(ZipPath, ZipArchiveMode.Create))
                {
                    foreach (string file in FILES_LIST)
                    {
                        // Add the entry for each file
                        zip.CreateEntryFromAny(file);
                    }
                }