验证将不起作用

Question

我已经向模型添加了验证，但是当我尝试在控制器中强制执行验证时，似乎无法检测到代码无效并转到错误的视图。

我的想法是，由于某种原因，它没有查看obj并绕过了它，但是我找不到找到方法来对其进行检查。

有人可以帮助我吗？

型号：

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

namespace TLA_Message_Board.Controllers
{
public class MessagesController : Controller
{
    // GET: Messages
    public ActionResult Load()
    {
        Messages obj = new Messages {
            Sender = "Ross McKenzie",
            Receiver = "Noah McKenzie",
            Year = 9,
            StartDate = new DateTime(2018, 06, 28),
            Expiry = new DateTime(2018, 06, 29),
            Title = "Title Test",
            Message = "This is the first message for the test of the internal message board."
        };
        return View("Messages",obj);

    }

    public ActionResult Enter()
    {

        return View("EnterMessages");
    }
    public ActionResult Submit()
    {

        Messages obj = new Messages();
        obj.Sender = Request.Form["Sender"];
        obj.Receiver = Request.Form["Receiver"];

        string year = Request.Form["Year"];
        obj.Year = Int32.Parse(year);

        string start = Request.Form["StartDate"];
        DateTime startParse = DateTime.Parse(start);
        obj.StartDate = startParse;

        string expiry = Request.Form["Expiry"];
        DateTime expiryParse = DateTime.Parse(expiry);
        obj.StartDate = expiryParse;

        obj.Title = Request.Form["Title"];
        obj.Message = Request.Form["Message"];

         if(ModelState.IsValid)
        {
            return View("Messages", obj);
        }
        else
        {
            return View("EnterMessages");
        }
    }
}
}

控制器：

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