Create Zip file in MVC Using C#

In this article I will explain how to download multiple file As Zip Archive file in ASP.Net MVC.

Step:1

First,Go to Visual Studio, open new ASP.NET Web application with relavent name.

Step:2

Go to Controller And Add Controller for to implement Action method.

Step:3

Then you need to Add DotNetZip library to application.For this Go to ->

Tools >>NuGet Package Manager >> Manage NuGet Packages for solution.

It will open NuGet – Solution tab and browse for DotNetZip Package and install it in project as following:

DotnetZip Package

Step:4

Add class for File as FileModel as following:

namespace CreateZipfile.Models
{
public class FileModel
{
public string FileName { get; set; }
public string FilePath { get; set; }
public bool IsSelected { get; set; }
}
}

Step:5

Add following method in ZipFile controller,

using CreateZipfile.Models;
using Ionic.Zip;
using System;
using System.Collections.Generic;
using System.IO;
using System.Web.Mvc;

namespace CreateZipfile.Controllers
{
    public class ZipFileController : Controller
    {
        // GET: ZipFile
        public ActionResult Index()
        {
            string[] filePaths = Directory.GetFiles(Server.MapPath("~/Files/"));
            List<FileModel> files = new List<FileModel>();
            foreach (string filePath in filePaths)
            {
                files.Add(new FileModel()
                {
                    FileName = Path.GetFileNameWithoutExtension(filePath),
                    FilePath = filePath
                });
            }
            return View(files);
        }
        [HttpPost]
        public ActionResult Index(List<FileModel> files)
        {
            
            using (ZipFile zip = new ZipFile())
            {
                List<string> filelist = new List<string>();
                zip.AlternateEncodingUsage = ZipOption.AsNecessary;
                zip.AddDirectoryByName("Files");
               
                foreach (FileModel file in files)
                {
                    if (file.IsSelected)
                    {
                        zip.AddFile(file.FilePath, "Files");
                        filelist.Add(Path.GetFileNameWithoutExtension(file.FileName));
                    }
                   
                }
                string filenames =string.Join("&",filelist.ToArray());
                string zipFileName = String.Format("ZipFile_{0}.zip", filenames);
                using (MemoryStream memoryStream = new MemoryStream())
                {
                    zip.Save(memoryStream);
                    return File(memoryStream.ToArray(), "application/zip", zipFileName);
                }
            }
        }
    }
}

DownloadZip()  => method return file which are available in Files Folder.

Downloadzip(List<FileModel> files) , This method convert all selected file to zip file(compressed file).

filelist contains name of selected file.

zipName  contains all name of selected filename with (&) join.

Step:6

Add View for This method As below:

@using CreateZipfile.Models
@model List<FileModel>
@{
    ViewBag.Title = "Index";
}
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <style>
        table td, th {
            border: 1px solid #b5b0b0;
            padding: 10px;
        }
    </style>
</head>
<body>

    @using (Html.BeginForm("Index", "ZipFile", FormMethod.Post))
    {
        <table>
            <tr>
                <th></th>
                <th>File Name</th>
            </tr>
            @for (int i = 0; i < Model.Count(); i++)
            {
                <tr>
                    <td>@Html.CheckBoxFor(model => model[i].IsSelected)</td>
                    <td>
                        @Html.HiddenFor(model => model[i].FilePath)
                        @Html.HiddenFor(model => model[i].FileName)
                        @Model[i].FileName
                    </td>
                </tr>
            }
        </table>
        <button id="download" value="Download Zip" >Download Zip</button>
    }
</body>
</html>

Output:

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