Windows Forms: Zip file, folder in C#

Step 1: Click New Project, then select Visual C# on the left, then Windows and then select Windows Forms Application. Name your project "ZipFile" and then click OK

Step 2: Design your form as below

You need to install Ionic.Zip from nuget. DotNetZip is a FAST, FREE class library and toolset for manipulating zip files. Use VB, C# or any .NET language to easily create, extract, or update zip files.

Step 3: Add code to button click event handler as below

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ZipFile
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnFolder_Click(object sender, EventArgs e)
        {
            //Select folder
            FolderBrowserDialog fbd = new FolderBrowserDialog();
            fbd.Description = "Select your path.";
            if (fbd.ShowDialog() == DialogResult.OK)
                txtFolder.Text = fbd.SelectedPath;
        }

        private void btnFileName_Click(object sender, EventArgs e)
        {
            //Select file name
            using(OpenFileDialog ofd=new OpenFileDialog() { Filter="All files|*.*", ValidateNames = true, Multiselect = false })
            {
                if (ofd.ShowDialog() == DialogResult.OK)
                    txtFileName.Text = ofd.FileName;
            }
        }

        private void btnZipFolder_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(txtFolder.Text))
            {
                MessageBox.Show("Please select your folder.", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
                txtFolder.Focus();
                return;
            }
            string path = txtFolder.Text;
            //Zip folder & update progress bar
            Thread thread = new Thread(t =>
              {
                  using(Ionic.Zip.ZipFile zip=new Ionic.Zip.ZipFile())
                  {
                      zip.AddDirectory(path);
                      System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(path);
                      zip.SaveProgress += Zip_SaveProgress;
                      zip.Save(string.Format("{0}{1}.zip", di.Parent.FullName, di.Name));
                  }
              })
            { IsBackground = true };
            thread.Start();
        }

        private void Zip_SaveProgress(object sender, Ionic.Zip.SaveProgressEventArgs e)
        {
            if (e.EventType == Ionic.Zip.ZipProgressEventType.Saving_BeforeWriteEntry)
            {
                progressBar.Invoke(new MethodInvoker(delegate
                {
                    progressBar.Maximum = e.EntriesTotal;
                    progressBar.Value = e.EntriesSaved + 1;
                    progressBar.Update();
                }));
            }
        }

        private void Zip_SaveFileProgress(object sender, Ionic.Zip.SaveProgressEventArgs e)
        {
            if (e.EventType == Ionic.Zip.ZipProgressEventType.Saving_EntryBytesRead)
            {
                progressBar.Invoke(new MethodInvoker(delegate
                {
                    progressBar.Maximum = 100;
                    progressBar.Value = (int)((e.BytesTransferred * 100) / e.TotalBytesToTransfer);
                    progressBar.Update();
                }));
            }
        }

        private void btnZipFile_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(txtFileName.Text))
            {
                MessageBox.Show("Please select your filename.", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
                txtFileName.Focus();
                return;
            }
            string fileName = txtFileName.Text;
            //Zip file & update process bar
            Thread thread = new Thread(t =>
            {
                using (Ionic.Zip.ZipFile zip = new Ionic.Zip.ZipFile())
                {
                    FileInfo fi = new FileInfo(fileName);
                    zip.AddFile(fileName);
                    System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(fileName);
                    zip.SaveProgress += Zip_SaveFileProgress;
                    zip.Save(string.Format("{0}/{1}.zip", di.Parent.FullName, fi.Name));
                }
            })
            { IsBackground = true };
            thread.Start();
        }
    }
}

DotNetZip works on PCs with the full .NET Framework, and also runs on mobile devices that use the .NET Compact Framework. Create and read zip files in VB, C#, or any .NET language

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