How to upload file in ASP.NET MVC, File Uploading Concept in ASP.NET MVC

 How to upload file in ASP.NET MVC, File Uploading Concept in ASP.NET MVC:-

It is used to upload external files in .NET application, ASP.NET uses <input type="file"  /> Html element to create File uploader.

We should also create enctype="multipart/form-data" under <form> element to upload files.

File uploading form always uses method="POST" because it will send large size data.

HttpPostedFileBase Class is used to upload the content of the file under the controller method.

It contains the Filename, Size, and File type of the currently uploaded file.

Code to create File Uploading Options:-

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Web;

using System.Web.Mvc;

namespace DataFirst.Controllers

{

    public class FileUploadController : Controller

    {

        //

        // GET: /FileUpload/

        public ActionResult Index()

        {

            return View();

        }

        [HttpPost]

        public ActionResult UploadFile(HttpPostedFileBase file)

        {

            try

            {

                if (file.ContentLength > 0)

                {

                    

                    string _FileName = Path.GetFileName(file.FileName);

                    string _path = Path.Combine(Server.MapPath("~/upload"), _FileName);

                    file.SaveAs(_path);

                }

                ViewBag.Message = "File Uploaded Successfully!!";

                return View("Index");

            }

            catch

            {

                ViewBag.Message = "File upload failed!!";

                return View("Index");

            }

        }

    }

}

Create  Index.html file:-

@{

    ViewBag.Title = "Index";

}

<h2>Index</h2>

@using (Html.BeginForm("UploadFile","FileUpload", FormMethod.Post, new { enctype="multipart/form-data"}))

{

    <input type="file" name="file" />

    <br />

    <input type="submit" name="btnsubmit" value="UploadFile" />

}

@ViewBag.Message

How to upload file in database table and show as a Gallery:-

Step1st:-

Create Table:-

tbl_upload(id,fpath)

Step2nd:-

Add table under Model using ADO.NET Entity Framework

Step3rd:-

Create Folder under project named as "upload"

Step4th:-

Create Controller class to design uploading form and Write Logic

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using QMS.Models;

namespace QMS.Controllers

{

    public class FIleUploadController : Controller

    {

        //

        // GET: /FIleUpload/

        Database1Entities db = new Database1Entities();

        public ActionResult Index()

        {

            return View();

        }

        public ActionResult UploadFile(HttpPostedFileBase file)

        {

            string _FileName = Path.GetFileName(file.FileName);

            string _path = Path.Combine(Server.MapPath("~/upload"), _FileName);

            file.SaveAs(_path);

            tbl_upload obj = new tbl_upload();

            obj.fpath = file.FileName;

            db.tbl_upload.Add(obj);

            db.SaveChanges();

            ViewBag.data = "File Uploaded Successfully";

            return View("Index");

        }

        public ActionResult ViewFile()

        {

            var s = db.tbl_upload.ToList();

            return View(s);

        }

    }

}

Step5th:-

Create Index.cshtml  and ViewFile.cshtml

Code of Index.cshtml:-

@{

    ViewBag.Title = "Index";

}

<h2>Index</h2>

@using (Html.BeginForm("UploadFile","FileUpload", FormMethod.Post, new { enctype="multipart/form-data"}))

{

    <input type="file" name="file" />

    <br />

    <input type="submit" name="btnsubmit" value="UploadFile" />

}

@ViewBag.data

<br />

@Html.ActionLink("View Image Here","ViewFile")

Code of ViewFile.cshtml

@model IEnumerable<QMS.Models.tbl_upload>

@{

    ViewBag.Title = "ViewFile";

}

<h2>ViewFile</h2>

<p>

    @Html.ActionLink("Create New", "Index")

</p>

@foreach (var item in Model) {

    <div style="float:left; margin-left:50px; margin-top:50px;">

           <img src="~/upload/@Html.DisplayFor(modelItem => item.fpath)" height="100" width="100" />

        </div>

       

  

}