ขอผู้ชี้แนะด้วยนะครับ เกี่ยวกับ DropDownList ใน ASP.NET กับ MVC C#

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<Contact.ViewModels.State>" %>

<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
	Create
</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">

    <form id="form1" runat="server">

    <h2>Create</h2>

    <% using (Html.BeginForm())
       {%>
        <%= Html.ValidationSummary(true)%>

        <fieldset>
            <legend>Fields</legend>
            
            <div class="editor-label">
                <%= Html.LabelFor(model => model.State_ID)%>
            </div>
            <div class="editor-field">
                <%= Html.TextBoxFor(model => model.State_ID)%>
                <%= Html.ValidationMessageFor(model => model.State_ID)%>
            </div>
            
            <div class="editor-label">
                <%= Html.LabelFor(model => model.State_Name_EN)%>
            </div>
            <div class="editor-field">
                <%= Html.TextBoxFor(model => model.State_Name_EN)%>
                <%= Html.ValidationMessageFor(model => model.State_Name_EN)%>
            </div>
            
            <div class="editor-label">
                <%= Html.LabelFor(model => model.State_Name_TH)%>
            </div>
            <div class="editor-field">
                <%= Html.TextBoxFor(model => model.State_Name_TH)%>
                <%= Html.ValidationMessageFor(model => model.State_Name_TH)%>
            </div>
            
            <div class="editor-label">
                <%--<%= Html.LabelFor(model => model.Country_ID) %>--%>
                 <%= Html.LabelFor(Model => Model.Country.Country_Name_EN)%>
            </div>

            <div class="editor-field">
                           
                    <%= Html.ValidationMessageFor(model => model.Country.Country_Name_EN)%>
<%= Html.TextBoxFor(model => model.Country_ID) %>
                <%= Html.ValidationMessageFor(model => model.Country_ID) %>
                </div>
            
            <p>
                <input type="submit" value="Create" />
            </p>
        </fieldset>

    <% } %>


    <div>
        <%= Html.ActionLink("Back to List", "Index") %>
    </div>

    </form>

</asp:Content>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Contact.ViewModels;
using Contact.Models;
using System.ComponentModel.DataAnnotations;
namespace Contact.Controllers
{
    public class StateController : Controller
    {
        //
        // GET: /State/

        public ActionResult Index()
        {
            var db = new Contact.ViewModels.IEOStudyDataContext();

            return View(db.States);
        }

        //
        // GET: /State/Details/5

        public ActionResult Details(int id)
        {
            var db = new Contact.ViewModels.IEOStudyDataContext();
            var state = db.States.SingleOrDefault(x => x.State_ID == id);
            return View(state);
            
        }

        //
        // GET: /State/Create

        public ActionResult Create()
        {
            return View();
        } 

        //
        // POST: /State/Create

        [HttpPost]
        public ActionResult Create(State state)
        {
            if (ModelState.IsValid)
            {
                try
                {
                    // TODO: Add insert logic here
                    var db = new Contact.ViewModels.IEOStudyDataContext();
                    db.States.InsertOnSubmit(state);
                    db.SubmitChanges();
                    return RedirectToAction("Index");
                }
                catch
                {
                    return View(state);
                }
            }
            return View(state);
        }
        
        //
        // GET: /State/Edit/5
 
        public ActionResult Edit(int id)
        {
            var db = new Contact.ViewModels.IEOStudyDataContext();
            var state = db.States.SingleOrDefault(x => x.State_ID == id);
            return View(state); 
        }

        //
        // POST: /State/Edit/5

        [HttpPost]
        public ActionResult Edit(int id, FormCollection collection)
        {
            var db = new Contact.ViewModels.IEOStudyDataContext();
            var state = db.States.SingleOrDefault(x => x.State_ID == id);
            if (ModelState.IsValid)
            {

                try
                {

                    UpdateModel(state);
                    db.SubmitChanges();
                    return RedirectToAction("Index");
                }
                catch
                {
                    return View(state);
                }
            }
            return View(state);
        }

        //
        // GET: /State/Delete/5
 
        public ActionResult Delete(int id)
        {
            var db = new Contact.ViewModels.IEOStudyDataContext();
            var state = db.States.SingleOrDefault(x => x.State_ID == id);
            return View(state);
        }

        //
        // POST: /State/Delete/5

        [HttpPost]
        public ActionResult Delete(int id, FormCollection collection)
        {
            var db = new Contact.ViewModels.IEOStudyDataContext();
            var statedel = db.States.SingleOrDefault(x => x.State_ID == id);
            db.States.DeleteOnSubmit(statedel);
            var state = db.States;


            if (ModelState.IsValid)
            {
                try
                {
                    // TODO: Add delete logic here
                    db.SubmitChanges();
                    return RedirectToAction("Index");
                }
                catch
                {
                    return View(state);
                }
            }
            return View(state);
        }
    }
}