explain how to bind webgrid in mvc4

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcApplication1.Models;
using System.Data;
using System.Data.SqlClient;

namespace MvcApplication1.Controllers
{
   
    public class registrationController : Controller
    {
        LoginEntities db = new LoginEntities();
        public ActionResult login()
        {
            return View();
        }
   [HttpGet]
        public ActionResult registration(MvcApplication1.Models.tbl_registration obj)
        {
       //     List<login> lgn = new List<login>();
       //     login log = new login();
       //     var regno = log.regno;
       //     var name = log.password;
       //var para=new SqlParameter{ParameterName="@regno", Value=regno};
       //var para1=new SqlParameter{ParameterName="@name", Value=name};

       //SqlConnection con=new SqlConnection
       
         

            return View();
        }
           //List<registration> reg = new List<registration>();
           // registration regist = new registration();
           // regist.regno = "";
           // regist.name = "";
           // regist.mobile = 0;
           // regist.gender = 0;
           // regist.country = 0;
    

    }
}