我们一般会向页面传递一个主要的类型的数据，一般情况下是一个List<Model>
ViewBag ViewData TempData之间的差别
ViewData与ViewBag之间非常相似，二者使用场景基本一致，但是ViewData的类型时很明确的，而ViewBag的类型时动态的，直接就可以使用，他们的传值范围是：controller向view传值，view自己和自己传值。而TempData存在的目的就是为了防止redirect的时候数据丢失，所以他的传值范围就是当前controller和跳转后的controller之间。
具体用法：
ViewBag:
ViewBag = ViewData+Dynamic wrapper around the ViewData
1.controller向view传值
view:
<p>@ViewBag.Message</p>
controller:
public ActionResult Index()
{
ViewBag.Message = "Dude,it is very Simple"
return View();
}
2.view向view传值(同一个view之间传值)
@{
ViewBag.Title = "Index";
}
<p>@ViewBag.Title</p>
3.viewBag传递一个对象
View:
<ul>
@foreach(var std in ViewBag.Students)
{
<li>@std</li>
}
</ul>
Controller:
public ActionResult Index()
{
var student = new List<string>
{
"Deepak Kumar",
"Rohit Ranjan",
"Manish Kumar"
};
ViewBag.Students = students;
return View();
}
Viewdata:
1.viewdata基本用法
View:
<ul>
@<foreach(var std in(List<string>ViewData["Students"])
{
<li>@std</li>
}
</ul>
controller:
public ActionResult Index()
{
var students = new List<string>
{
"Deepak Kumar",
"Rohit Ranjan",
"Manish Kumar"
};
ViewData["Students"] = students;
return View();
}
ViewData转换成ViewBag:
View:
<ul>
@foreach(var std in(List<string>)ViewBag.Students)
{
<li>@std</li>
}
</ul>
Controller:
public ActionResult Index()
{
var students = new List<string>
{
"Deepak Kumar",
"Rohit Ranjan",
"Manish Kumar"
};
ViewData["Students"] = students;
return View();
}
ViewBag转换成ViewData:
View:
<ul>
@foreach(var std in(List<string>)ViewData["Students"])
{
<li>@std</li>
}
</ul>
controller:
public ActionResult Index()
{
var students = new List<string>
{
"Deepak Kumar",
"Rohit Ranjan",
"Manish Kumar"
}
ViewBag.Students = students;
return View();
}
TempData:
TempData用于在Redirect的时候保存数据，而ViewData和ViewBag在跳转后就会变成null
public ActionResult Index()
{
var model = new Review()
{
Body = "Start",
Rating = 5
};
TempData["ModelName"] = model;
return RedirectToAction("About");
}
<pre><pre lang="cs">public ActionResult About()
{
var model = TempData["ModelName"];
return View(model);
}
普通页面传递model:
controller:
public ActionResult Index()
{
Product p = new Product();
p.Name = "Toy";
return View(p);
}
View:
Product : <%: ((Product)Model).Name %>
向强类型视图传递model:
controller:
public ActionResult Index()
{
Product p = new Product();
p.Name = "Toy";
return View(p);
}
View:
声明类型
<%@ Page Inherits="System.Web.Mvc.ViewPage<Product>" %>
直接用Model调用该对象
<h2> Product Name: <%: Model.Name %> </h2>
Razor视图引擎：
在razor中申明类型的方式：@model MVC3App.Models.Product
在razor中调用对象的方式：<h2>Product:@Model.Name</h2>