mvc 过滤器

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

namespace OAMvcApp.Models
{
    public class LoginCheckFilterAttribute:ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            base.OnActionExecuting(filterContext);

            if (filterContext.HttpContext.Session["user"] == null)
            {
                filterContext.HttpContext.Response.Redirect("/Login/Index");
            }
        }
    }
}

控制器使用方法：

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

namespace OAMvcApp.Controllers
{
    [LoginCheckFilterAttribute]
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            

            return View("win7");
        }

        public ActionResult About()
        {
            ViewBag.Message = "Your app description page.";

            return View();
        }

        public ActionResult Contact()
        {
            ViewBag.Message = "Your contact page.";

            return View();
        }
    }
}