通常情况下，使用TempData需要记住key的名称，本篇体验：通过帮助类，实现对TempData的设置、获取、删除。

 

关于传递信息的类：

namespace MvcApplication1.Models{    public class Notification    {        public bool IsShow { get; set; }        public string Content { get; set; }    }}

 

帮助类，使用TempData对信息处理：

using System;using System.Web.Mvc;using MvcApplication1.Models;namespace MvcApplication1.Extension{    public class NotificationHelper    {        public static void SetNotification(Controller controller, bool isShow, string content)        {            Notification notification = new Notification()            {                IsShow = isShow,                Content = content            };            controller.TempData["n"] = notification;        }        public static Notification GetNotification(Controller controller)        {            try            {                Notification notification = controller.TempData["n"] as Notification;                return notification;            }            catch (Exception ex)            {                //TODO:记录日志                return null;            }        }        public static void RemoveNotification(Controller controller)        {            controller.TempData.Remove("n");        }    }}

 

在HomeController中，把信息放到TempData中：

using System.Web.Mvc;using MvcApplication1.Extension;namespace MvcApplication1.Controllers{    public class HomeController : Controller    {               public ActionResult Index()        {            NotificationHelper.SetNotification(this, true, "放假了~~");            return View();        }    }}

 

Home/Index.cshtml视图为：

@{    ViewBag.Title = "Index";    Layout = "~/Views/Shared/_Layout.cshtml";}
Index
@Html.ActionLink("看看TestController那边是否放假了","Index","Test")

在TestController中，获取TempData存储的信息：

using System.Web.Mvc;using MvcApplication1.Extension;using MvcApplication1.Models;namespace MvcApplication1.Controllers{    public class TestController : Controller    {        public ActionResult Index()        {            Notification notification = NotificationHelper.GetNotification(this);            if (notification != null)            {                ViewData["t"] = notification.IsShow;                ViewData["c"] = notification.Content;            }            return View();        }    }}

Test/Index.cshtml视图：

@using MvcApplication1.Models@{    ViewBag.Title = "Index";    Layout = "~/Views/Shared/_Layout.cshtml";}
Test
@if (ViewData["t"] != null){    Notification notification = new Notification()    {        IsShow = (bool)ViewData["t"],        Content = ViewData["c"] as string    };    if (notification.IsShow)    {        @notification.Content    }    else    {        @: 有通知，但未发布    }}else{  @: 暂无通知}