1.ViewData
1.1 ViewData继承了IDictionary<string, object>,因此在设置ViewData属性时,传入key必须要字符串型别,value可以是任意类型。
1.2 ViewData它只会存在这次的HTTP要求而已,而不像Session可以将数据带到下HTTP要求。
public class TestController : Controller { public ActionResult Index() { ViewData["msg"] = "123123"; return View(); } }
@{ ViewBag.Title = "Index"; } <h2>页面</h2> <h2>@ViewData["msg"]</h2>
2.ViewData的扩张属性ViewData.Model
public class TestController : Controller { public ActionResult Index() { User aa = new User() { Age = 1, Name = "linq" }; //ViewData.Model = aa; return View(aa); } }
@{ ViewBag.Title = "Index"; } @model MvcApplication1.Models.User <h2>页面</h2> <h2>@Model.Age</h2> <h2>@Model.Name</h2>
3.ViewBag
3.1 严格来说ViewBag和ViewData的区别就是ViewBag是dynamic动态型别
public class TestController : Controller { public ActionResult Index() { User aa = new User() { Age = 1, Name = "linq" }; ViewBag.User = aa; return View(); } }
@{ ViewBag.Title = "Index"; } <h2>页面</h2> <h2>@ViewBag.User.Age</h2> <h2>@ViewBag.User.Name</h2>
4.TempData
4.1 TempData的信息在"一次网页要求内有效"(ActionResult的返回类型必须为RedirectToRouteResult或RedirectToRouteResult类别,除此以外只要有取用的TempData的键值,默认就会在当次网页就要求清除,但你只是单纯设置了TempData的值,并没有读取行为的话,TempData还是会保留到下次使用)
public class TestController : Controller { public ActionResult Index(string msg) { TempData["msg"] = msg; return RedirectToAction("Index2"); } public ActionResult Index2() { return View(); } }
时间: 2024-10-28 23:48:15