In MVC How Can I bind my Gridview with the DB ?

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ASP.NET

MVC

How Can I bind my Gridview with the DB ?
Here I fix The Values but i want to connect the grid to the DB :)

.cs Code ( the Controller )

using ReceiptMvc.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace ReceiptMvc.Controllers
{
    public class ShowGridController : Controller
    {
        //
        // GET: /ShowGrid/
        ReceiptDBEntities db = new ReceiptDBEntities();

        public ActionResult Index()
        {
            return View(ReceiptItems);
        }

        private readonly List<ReceiptItem> ReceiptItems = new List<ReceiptItem>()
    {

        new ReceiptItem { ReceiptItemId =9,ReceiptId=5, Price=50 ,Item ="gg",Quantity=20 }
        


    };
    }
}

.cshtml code ( The View )

@model IEnumerable<ReceiptMvc.Models.ReceiptItem>
@using GridMvc.Html

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>
<div style="width:500px;">
    @Html.Grid(Model).Columns(columns =>
                    {
                        columns.Add(c => c.ReceiptId).Titled("ReceiptId").Filterable(true);
                        columns.Add(c => c.ReceiptItemId).Titled("ReceptItemId");
                        columns.Add(c => c.Item).Titled("Item");
                        columns.Add(c => c.Quantity).Titled("Quantity");
                        columns.Add(c => c.Price).Titled("Price");
                    }).WithPaging(3).Sortable(true)
</div>