Add Files Into Existing Zip

Question

I can successfully extract files from a zip folder into a folder, but I am not quite sure how to take those files and add them into an existing zip file. I extract them into a directory onto the desktop called "mod", and then I need to add them to another zip file. Help? Here is my extraction code-

ZipFile zip = ZipFile.Read(myZip);
zip.ExtractAll(outputDirectory,ExtractExistingFileAction.OverwriteSilently);

Help is appreciated, thank you.

Answer 1

Try giving this a try, once you extract the files from the source zip, you will need to read the destination zip file into a ZipFile object you can then use the AddFiles method to add your source files to the destination file, then save it.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; 
using Ionic.Zip;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string myZip = @"C:\temp\test.zip";
            string myOtherZip = @"C:\temp\anotherZip.zip";
            string outputDirectory = @"C:\ZipTest";

            using (ZipFile zip = ZipFile.Read(myZip))
            {
                zip.ExtractAll(outputDirectory, ExtractExistingFileAction.OverwriteSilently);
            }

            using (ZipFile zipDest = ZipFile.Read(myOtherZip))
            {
                //zipDest.AddFiles(System.IO.Directory.EnumerateFiles(outputDirectory)); //This will add them as a directory
                zipDest.AddFiles((System.IO.Directory.EnumerateFiles(outputDirectory)),false,""); //This will add the files to the root
                zipDest.Save();
            }
        }
    }
}

---

Modified Method for adding a Directory to the ZipFile ( This will work for a single sub directory level )

using (ZipFile zipDest = ZipFile.Read(myOtherZip))
{
    foreach (var dir in System.IO.Directory.GetDirectories(outputDirectory))
    {
        zipDest.AddFiles((System.IO.Directory.EnumerateFiles(dir)),false,outputDirectory ); //directory to the root
    }
    zipDest.AddFiles((System.IO.Directory.EnumerateFiles(outputDirectory)),false,""); //This will add the files to the root
    zipDest.Save();
}

---

Method for deleting files from a Zip Directory

List<string> files = zipDest.EntryFileNames.ToList<string>(); // Get List of all the archives files
for (int i = 0; i < files.Count; i++)
{
    if(files[i].Contains("ZipTest")) //replace the directory you wish to delete files from here
        zipDest.RemoveEntry(files[i]);
}