Create Zip files and unzip using . NET 3.5

Question

I’m making an online installer for my Github program, I made a Form with some basic controls.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Net;
using System.Windows.Forms;
using System.Threading;
using System.IO;
using System.IO.Compression;
using System.Reflection;

namespace IEIPInstaller
{
    public partial class Main : Form
    {
        private string temp = Path.Combine(Path.GetTempPath(), "IEIPInst");
        private string localProg = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);

        public Main()
        {
            if (Directory.Exists(temp))
            {
                if(File.Exists(temp + "\\IEIPv0.2-alpha-Windows.zip"))
                {
                    File.Delete(temp + "\\IEIPv0.2-alpha-Windows.zip");
                }
                Directory.Delete(temp);
            }
            if(File.Exists(localProg + "\\IEIPv0.2-alpha-Windows.zip"))
            {
                MessageBox.Show("Installer cannot be initialized because you have IEIP with this program.", "IEIPInst", MessageBoxButtons.OK, MessageBoxIcon.Error);
                Environment.Exit(0);
            }
            else
            {
                InitializeComponent();
                Directory.CreateDirectory(temp);
            }
        }

        private void btnNo_Click(object sender, EventArgs e)
        {
            Directory.Delete(temp, true);
            Application.Exit();
        }

        private void btnYes_Click(object sender, EventArgs e)
        {
            btnYes.Enabled = false;
            btnNo.Enabled = false;
            lblWant.Text = "";
            Complete.Text = "Status: Connecting...";
            startDownload();
        }

        private void startDownload()
        {
                WebClient client = new WebClient();
            
                client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
                client.DownloadFileCompleted += new AsyncCompletedEventHandler(client_DownloadFileCompleted);
                client.DownloadFileAsync(new Uri("https://github.com/JPPlaysGamer/IndustriesExes.Inc/releases/download/ieip-pre2/IEIPv0.2-alpha-Windows.zip"), temp + "\\IEIPv0.2-alpha-Windows.zip");

                

        }
        void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            this.BeginInvoke((MethodInvoker)delegate {
                double bytesIn = double.Parse(e.BytesReceived.ToString());
                double totalBytes = double.Parse(e.TotalBytesToReceive.ToString());
                double percentage = bytesIn / totalBytes * 100;
                Mbs.Text = (bytesIn / 1024 / 1024).ToString("F2") + " / " + (totalBytes / 1024/ 1024).ToString("F2") + " Mb";
                Complete.Text = "Status: Downloading...";
                IEIPProgress.Value = int.Parse(Math.Truncate(percentage).ToString());
                this.Text = "IEIP Installer - " + IEIPProgress.Value + "%";
                
            });
        }
        void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
        {
            this.BeginInvoke((MethodInvoker)delegate {
                if(File.Exists(temp + "\\IEIPv0.2-alpha-Windows.zip"))
                {
                    File.Move(temp + "\\IEIPv0.2-alpha-Windows.zip",  localProg + "\\IEIPv0.2-alpha-Windows.zip");
                }
                
                Complete.Text = "Status: Completed";
                
                btnNo.Text = "Exit";
                btnNo.Enabled = true;
                
            });
        }

    }
}

In JIT:

This is the structure of this Form and in the client_DownloadFileCompleted function wanted to make you unzip the zip file that shows in the code. But as I am using . NET 3.5 (version embedded in Windows, I think) does not have the class System.IO.Compression.Zipfile and works only on . recent NET. But there’s the Gzipstream class that can handle Zip. Is there any way to zip and unzip files with this class or with some Nuget library (or Github)?

Answer 1

Good afternoon, You can use the library Ionic.Zip which is compatible with . NET Framework 3.5, but has been discontinued. I have successfully used it in old projects.

The documentation is here.

Follow a simple example:

class IonicZip
{
    private string _origem;
    private string _destino;

    public string origem
    {
        set { _origem = value; }
    }
    public string destino
    {
        set { _destino = value; }
    }

    public void Compactar()
    {
        if (File.Exists(_destino))
            File.Delete(_destino);
        ZipFile arquivoZip = new ZipFile(_destino);
        arquivoZip.AddDirectory(@_origem);
        arquivoZip.Save();
        arquivoZip.Dispose();
    }

    public void Descompactar()
    {
        ZipFile arquivoZip = ZipFile.Read(_origem);
        try
        {
            foreach (ZipEntry e in arquivoZip)
            {
                e.Extract(_destino, true);
            }
            arquivoZip.Dispose();
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }
}