Recently I got a chance to work on an MVC Project, In Which had a requirement to implement upload and download functionality in my Web application. Now I decided to write an article on this topic so that it will help others developer also who is looking for the same.

Now I have  Created an Empty MVC application and also Created a folder “PdfFiles” in my project where we need to save the uploaded pdf files.

1. Now Add a controller “Home” in the Project and also add an action method in it.
2. Right Click in the Action Method and add a View 

View Html Code

@model  IEnumerable<WebAppMvc.Controllers.FilesInoformation>

@{
    ViewBag.Title = "Index";
}
@using (Html.BeginForm("UploadPdf", "Home", FormMethod.Post,
                                        new { enctype = "multipart/form-data" }))
{
    @Html.AntiForgeryToken()
    <fieldset>
        <legend>Upload a Pdf file</legend>
        <div class="editor-field">
            @Html.TextBox("file", "", new { type = "file", accept = "application/pdf" })
        </div>
        <br />
        <br />
        <div class="editor-field">
            <input type="submit" value="Upload Pdf" />
        </div>
        <div class="row">
            <h3>Uploaded Filles</h3>
            <table class="table">
                <thead>
                    <tr>
                        <th>FileName</th>
                        <th>Action</th>
                    </tr>
                </thead>
                @if (Model != null)
                {
                    foreach (var file in Model)
                    {
                        <tr>
                            <td>@file.filename</td>
                            <td><a href="@Url.Action("", "",new {filename=file.filename })">Download</a></td>
                        </tr>
                    }
                }
            </table>
        </div>
    </fieldset>
}

Controller Code

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace WebAppMvc.Controllers
{

    public class FilesInoformation
    {
        public string filename { get; set; }
    }
    public class HomeController : Controller
    {
        // GET: Home
        public ActionResult Index()
        {
            //getting the list of file uploaded 
            DirectoryInfo directory = new DirectoryInfo(Server.MapPath(@"~\PdfFiles"));
            var files = directory.GetFiles().ToList();
            List<FilesInoformation> model = new List<FilesInoformation>();
            foreach (var file in files)
            {
                model.Add(new FilesInoformation { filename = file.Name });
            }
            return View(model);
        }

        [HttpPost]
        public ActionResult UploadPdf(HttpPostedFileBase file)
        {
            //action method for uploading the pdf file
            try
            {
                if (file.ContentLength > 0)
                {
                    var fileName = Path.GetFileName(file.FileName);
                    var Pdfpath = Path.Combine(Server.MapPath("~/PdfFiles"), fileName);
                    file.SaveAs(Pdfpath);
                }
            }
            catch
            {

            }
            return RedirectToAction("Index");
        }

        public FileResult DownloadPdf(string filename)
        {
            //action method for downloadig the pdf file
            string filepath = Server.MapPath(@"~\PdfFiles\")+ filename;
            return File(filepath, "application/force-", filename);
        }
    }
}

DownLoad Source Code

Result