Using 3 Tier in MVC3

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C#

MVC

Razor

say, I have a class library name CustomObject. This library holds objects. one of them is Product

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ObjectLayer
{
    [Serializable]
    public class Products
    {
        private int _Id;
        private string _ProductName;
        private string _ProductMakers;
        private int _Price;
        private OrderPlacementModes _ActionTaken;
        public Products()
        {
            Id = 0;
            ProductName = string.Empty;
            ProductMakers = string.Empty;
            Price = 0;
            ActionTaken = OrderPlacementModes.NoAction;

        }

        public int Id
        {
            get
            {
                return _Id;
            }
            set
            {
                _Id = value;
            }
        }
        public string ProductName
        {
            get
            {
                return _ProductName;
            }
            set
            {
                _ProductName = value;
            }
        }
        public string ProductMakers
        {
            get
            {
                return _ProductMakers;
            }
            set
            {
                _ProductMakers = value;
            }
        }
        public int Price
        {
            get
            {
                return _Price;
            }
            set
            {
                _Price = value;
            }
        }
        public OrderPlacementModes ActionTaken
        {
            get { return _ActionTaken; }
            set { _ActionTaken = value; }
        }
    }
}

solution has another project which holds BAL (Business Access Layer) and a DAL (Data Access Layer)

I did in Controller is

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using ObjectLayer;
using OrderPlacementBLL;

namespace MvcApplication1.Controllers
{
    public class ProductssController : Controller
    {
        //
        // GET: /Products/

        public ActionResult Index()
        {
            return View(new ProductsBLL().GetAllProducts());
        }

        [HttpPost]
        public ActionResult Index(FormCollection ProductList)
        {

            return View();
        
        }

    }
}

and in view

@model List<ObjectLayer.Products>
<h2>
    Index</h2>
@using (Html.BeginForm("Index", "Productss", FormMethod.Post, null))
{
    foreach (var item in Model)
    {
    <legend>
        <fieldset>
            Id:             @Html.TextBoxFor(txt => item.Id)<br />
            Prict:          @Html.TextBoxFor(txt => item.Price)<br />
            Makers:         @Html.TextBoxFor(txt => item.ProductMakers)<br />
            Product Name:   @Html.TextBoxFor(txt => item.ProductName)<br />
        </fieldset>
    </legend>
    }
    
    <input type="submit" value="Submit" />
    
    
}

now I want, when I pressed submit button, all the data (List<products>) should be submitted to the controller with changes. please help