Working With Zip Files

Read Zip Files

List All Files Contained in the Zip File

using var zipFile = ZipFile.OpenRead("multi-folder.zip");

var counter = 0;
foreach (var entry in zipFile.Entries)
    Console.WriteLine($"{++counter,3}: {entry.Name}");

Extract Files From Zip File With ExtractToDirectory() Method

ZipFile.ExtractToDirectory("multi-folder.zip", "extracted-files", true);

Extract Files From Zip File With ExtractToFile() Method

using var zipFile = ZipFile.OpenRead("multi-folder.zip");
var rootFolder = "extracted-files";
foreach (var entry in zipFile.Entries)
{
    var wholePath = Path.Combine(
        rootFolder,
        Path.GetDirectoryName(entry.FullName) ?? string.Empty);

    if (!Directory.Exists(wholePath))
        Directory.CreateDirectory(wholePath);

    if (!string.IsNullOrEmpty(entry.Name))
    {
        var wholeFileName = Path.Combine(
            wholePath,
            Path.GetFileName(entry.FullName));

        entry.ExtractToFile(wholeFileName, true);
    }
}

Extract Files With Open() Method

using var zipFile = ZipFile.OpenRead("multi-folder.zip");
foreach (var entry in zipFile.Entries)
{
    if (!string.IsNullOrEmpty(entry.Name))
    {
        using (var stream = entry.Open())
        using (var memoryStream = new MemoryStream())
        {
            stream.CopyTo(memoryStream);
            var bytes = memoryStream.ToArray();
            var base64 = Convert.ToBase64String(bytes);
            Console.WriteLine($"{entry.FullName} => {base64}");
        }
    }
}

Create Zip Files

Compress (Zipping) Whole Folder

ZipFile.CreateFromDirectory(@"c:\temp", "temp.zip");

Add Files to a Zip File

var folder = new DirectoryInfo(".");
FileInfo[] files = folder.GetFiles("*.txt", SearchOption.AllDirectories);

using var archive = ZipFile.Open(@"..\parent.zip", ZipArchiveMode.Create);

foreach (var file in files)
{
    archive.CreateEntryFromFile(
        file.FullName,
        Path.GetRelativePath(folder.FullName, file.FullName)
    );
}

Create a Zip File With Stream

var helloText = "Hello world!";

using var archive = ZipFile.Open(@"..\test.zip", ZipArchiveMode.Create);

var entry = archive.CreateEntry("hello.txt");

using (Stream st = entry.Open())
using (StreamWriter writerManifest = new StreamWriter(st))
writerManifest.WriteLine(helloText);

Compression Level

var entry = archive.CreateEntry("hello.txt", CompressionLevel.SmallestSize);

Delete Entries From Zip Files

using var zipFile = ZipFile.Open("multi-folder.zip", ZipArchiveMode.Update);

var images = zipFile.Entries.Where(e => e.Name == "image.png").ToList();

for (int i = images.Count - 1; i >= 0; --i)
    images[i].Delete();