[开发测试]asp.net mvc控制器给view传递数据

分三种：ViewBag，ViewData，View()+Model

一、ViewBag

ViewBag时，前端接收不需要转类型

后台代码

public ActionResult About()
{
  ViewBag.Message = "Your application description page.";
  List<string> colors = new List<string>();
  colors.Add("Red");
  colors.Add("blue");

  ViewBag.Listcolors = colors;
  return View();
}

view

@{
  ViewBag.Title = "About";
}
<script>
  var message='@Html.Raw(ViewBag.Message)';
</script>

<h2>@ViewBag.Title.</h2>
<h3>@ViewBag.Message</h3>

<p>Use this area to provide additional information.</p>
<ul>
@foreach (var color in ViewBag.ListColors)
{
  <li>@color</li>
}
</ul>

二、ViewData

需要转类型
后台

public ActionResult About()
{
  ViewBag.Message = "Your application description page.";
  List<string> colors = new List<string>();
  colors.Add("Red");
  colors.Add("blue");

  ViewData["ListColors"] = colors;
  ViewData["DatetimeNow"] = DateTime.Now;
  return View();
}

View

@{
ViewBag.Title = "About";
}
<h2>@ViewBag.Title.</h2>
<h3>@ViewBag.Message</h3>

<p>Use this area to provide additional information.</p>
<ul>
<!--转类型-->
@foreach (var color in ViewData["listColors"] as List<string>)
{
  <li>@color</li>
}
</ul>
<p>@ViewData["DatetimeNow"]</p>

三、View()+Model

需要Model
后台
Model

namespace TestSpace.Models
{
  public class Dog
  {
    public string Name{set; get;}
    public int Age{set; get;}
  }
}

控制器

public ActionResult ShowList()
{
  List<Dog> list=new List<Dog>();
  list.Add(dogs);
  return View(list);
}

View

@model System.Collections.Generic.List<TestSpace.Models.Dog>
...
...
...
<p>@Model[0].Name</p>