Upload File (Single file at once) to SQL Server Database from Index.cshtml view page and download them from Download.cshtml view page. If you want to upload multiple files once read this gist https://gist.github.com/itorian/9389738

Download.cshtml

@model IEnumerable<MvcFileUploadToDB.Models.FileUploadDBModel>

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Upload New", "Index")
</p>

<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.FileName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.File)
        </th>
    </tr>

    @foreach (var item in Model)
    {
        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.FileName)
            </td>
            <td>
                @Html.ActionLink("Download", "Filedownload", new { id=item.Id})
            </td>
        </tr>
    }
</table>

FileUploadDBContext.cs

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Web;

namespace MvcFileUploadToDB.Models
{
    public class FileUploadDBContext : DbContext
    {

        public FileUploadDBContext()
            : base("name=FileUploadDBContext")
        {
        }

        public System.Data.Entity.DbSet<MvcFileUploadToDB.Models.FileUploadDBModel> FileUploadDBModels { get; set; }
    
    }
}

HomeController.cs

using MvcFileUploadToDB.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.Mvc;

namespace MvcFileUploadToDB.Controllers
{
public class HomeController : Controller
{
    private FileUploadDBContext db = new FileUploadDBContext();

    public ActionResult Index()
    {
        var model = new MyViewModel();
        return View(model);
    }

    [HttpPost]
    public ActionResult Index(MyViewModel model)
    {
        if (!ModelState.IsValid)
        {
            return View(model);
        }

        FileUploadDBModel fileUploadModel = new FileUploadDBModel();

        byte[] uploadFile = new byte[model.File.InputStream.Length];
        model.File.InputStream.Read(uploadFile, 0, uploadFile.Length);

        fileUploadModel.FileName = model.File.FileName;
        fileUploadModel.File = uploadFile;

        db.FileUploadDBModels.Add(fileUploadModel);
        db.SaveChanges();

        return Content("File Uploaded.");
    }

    public ActionResult Download()
    {
        return View(db.FileUploadDBModels.ToList());
    }

    public FileContentResult FileDownload(int? id)
    {
        byte[] fileData;
        string fileName;

        FileUploadDBModel fileRecord = db.FileUploadDBModels.Find(id);

        fileData = (byte[])fileRecord.File.ToArray();
        fileName = fileRecord.FileName;

        return File(fileData, "text", fileName);
    }
}
}

Index.cshtml

@model MvcFileUploadToDB.Models.MyViewModel

@{
    ViewBag.Title = "Home Page";
}

<div class="jumbotron">
    @using (Html.BeginForm(null, null, FormMethod.Post, new { enctype = "multipart/form-data" }))
    {
        <div>
            @Html.LabelFor(x => x.File)
            @Html.TextBoxFor(x => x.File, new { type = "file" })
            @Html.ValidationMessageFor(x => x.File)
        </div>
        <button type="submit">Upload File</button>
    }
</div>

<p>
    @Html.ActionLink("Download File", "Download")
</p>

MyViewModel.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;

namespace MvcFileUploadToDB.Models
{
    public class MyViewModel
    {
        [Required]
        [DisplayName("Select File to Upload")]
        public HttpPostedFileBase File { get; set; }
    }

    public class FileUploadDBModel
    {
        public int Id { get; set; }
        public string FileName { get; set; }
        public byte[] File { get; set; }
    }
}

Web.config

<add name="FileUploadDBContext" connectionString="Data Source=(localdb)\v11.0; Initial Catalog=DelContext-20140305142934; Integrated Security=True; MultipleActiveResultSets=True; AttachDbFilename=|DataDirectory|DelContext-20140305142934.mdf"
  providerName="System.Data.SqlClient" />

goood