.NETCore | MVC | 3 ViewData、ViewBag、ViewMode

资料来之：https://www.bilibili.com/video/BV1mY411K7C5?p=6

笔记如下：

ViewData 是ViewDataDictionary类型，字典类型，只要key值不重复前端可正常访问

 

因此我们在Controller的方法内赋值时可以如下操作：

 

 

 View中方法方式代码：

@{
    var tc = @ViewData["tc"] as MVC02.Models.Teacher ;
} 
<h1>@ViewData["name"]</h1>
<h1>@tc.name</h1>

ViewBag也是通过键值对的方式给View传值，为dynamic动态类型是在程序运行时才解析对应的类型数据

 

 

 用法如下：

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public IActionResult Index()        {            Teacher tc = new Teacher()            {                name = "TeacherName",                sex = "女",                age = 18            };            ViewData["name"] = "dong";            ViewData["tc"] = tc;              ViewBag.Teacher = tc;            ViewBag.TeacherStr = "我来之ViewBag";                return View(tc);        }

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1 2	<h1>@ViewBag.TeacherStr</h1> <h1>@ViewBag.Teacher.name</h1>

ViewMode

 

 

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public class TeacherInfo  {      public Teacher Tec { get; set; }      public Address Ads { get; set; }  }

　　

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public class Address {     public string Privince { get; set; }     public string City { get; set; } }

　　

public IActionResult Index()
        {
            TeacherInfo info = new TeacherInfo();
            info.Tec = new Teacher()
            {
                name = "张三",
                sex = "男",
                age = 18
            };
            info.Ads = new Address()
            {
                Privince = "河南",
                City = "郑州"
            };
            return View(info);
        }

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@model MVC02.ViewModels.TeacherInfo  <h1>@Model.Tec.name</h1> <h1>@Model.Ads.City</h1>