Asp.Net MVC Control向View传值

 1、通过View(Parameter)参数传值    

Control:

namespace MyMVCDemo.Controllers
{
    public class PersonController : Controller
    {
        //
        // GET: /Person/
        public ActionResult Index()
        {
            Person whiteperson = new Person();
            whiteperson.Id = 1;
            whiteperson.Name = "James";
            whiteperson.Age = 28;

            return View(whiteperson);
        }

      }
}

View

@model MyMVCDemo.Models.Person   //强类型视图
@using MyMVCDemo.Models//引用实体类命名空间
@{var person = ViewData.Model;}

<br />
<p>@person.Id</p>
<p>@person.Name</p>

2、通过动态对象ViewBag.key传值，ViewBag 是动态类型（dynamic），在程序运行时动态解析

Control

namespace MyMVCDemo.Controllers
{
    public class PersonController : Controller
    {
        //
        // GET: /Person/
        public ActionResult Index()
        {
            Person whiteperson = new Person();
            whiteperson.Id = 1;
            whiteperson.Name = "James";
            whiteperson.Age = 28;

            ViewBag.person = whiteperson;

            return View();
        }

      }
}

　　

View

@using MyMVCDemo.Models
@{var person = ViewBag.person;}

    <br />
    <p>@person.Id</p>
    <p>@person.Name</p>

3、通过ViewData传值，是一个字典型，数据是Object类型，使用时要进行强制类型转换

Control

namespace MyMVCDemo.Controllers
{
    public class PersonController : Controller
    {
        //
        // GET: /Person/
        public ActionResult Index()
        {
            Person whiteperson = new Person();
            whiteperson.Id = 1;
            whiteperson.Name = "James";
            whiteperson.Age = 28;

            ViewData["person"] = whiteperson;

            return View();
        }

      }
}

View

@using MyMVCDemo.Models
@{var person =(Person)ViewData["person"]

;} <br /> <p>@person.Id</p> <p>@person.Name</p>

4、通过TempData传值

Control

namespace MyMVCDemo.Controllers
{
    public class PersonController : Controller
    {
        //
        // GET: /Person/
        public ActionResult Index()
        {
            Person whiteperson = new Person();
            whiteperson.Id = 1;
            whiteperson.Name = "James";
            whiteperson.Age = 28;

            TempData["id"] = whiteperson.Id;
            TempData["name"] = whiteperson.Name;
            TempData["age"] = whiteperson.Age;

            return View();
        }

      }
}

View

    <label>@TempData["id"]</label>
    <label>@TempData["name"]</label>
    <label>@TempData["age"]</label>

5、总结

ViewData是字典类型的，数据是Object类型的，因此使用时要进行强制类型转换；ViewBag是dynamic类型，在程序运行时动态解析；ViewData和ViewBag的生命周期与View相同，并且只对当期View有效；而TempData可以在不同的View中进行传值，是用session机制处理的，但是TempData里面的数据在访问了一次后会被清除。

Control

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

namespace MyMVCDemo.Controllers
{
    public class PersonController : Controller
    {
        //
        // GET: /Person/
        public ActionResult Index()
        {
            Person whiteperson = new Person();
            whiteperson.Id = 1;
            whiteperson.Name = "James";
            whiteperson.Age = 28;
            //ViewData向视图传递数据
            ViewData["id"] = whiteperson.Id;
            ViewData["name"] = whiteperson.Name;
            ViewData["age"] = whiteperson.Age;
            ViewData["person"] = whiteperson;
            //ViewBag向视图传递数据
            ViewBag.id = whiteperson.Id;
            ViewBag.name = whiteperson.Name;
            ViewBag.age = whiteperson.Age;
            ViewBag.person = whiteperson;
            //TempData向视图传递数据
            TempData["id"] = whiteperson.Id;
            TempData["name"] = whiteperson.Name;
            TempData["age"] = whiteperson.Age;
            TempData["temp"] = "TempData";
            ViewBag.temp = "ViewBagData";
            ViewData["temp"] = "ViewData";
            //return View(whiteperson);
            return View(whiteperson);
        }

        public ActionResult About()
        {
            return View();
        }
	}
}

About视图里面调用：

@{
    ViewBag.Title = "About";
}

<h2>About</h2>
<div>@TempData["temp"]</div>
<div>@ViewData["temp"]</div>
<div>@ViewBag.temp</div>

刷新About页面，则TempData["temp"]数据删除