在 asp.net MVC 中投射 ViewData

Question

这是我的控制器代码：

    public ActionResult Index()
    {
        AccountModel user = new AccountModel();
        user.Username = "Jay";
        user.Password = "Jay";
        ViewData["EmpData"] = user;
        return View();
    }

如何在视图代码中投射ViewData["EmpData"] ？

Answer 1

在这里，在视图代码中使用它：

@*Change namespace per your solution.*@
@using WebApplication.Models;
@{
    AccountModel emp = (AccountModel) ViewData["EmpData"];
}

Answer 2

   // Controller
       public ActionResult Index2()
    {
     IList<Student> studentList = new List<Student>();
     studentList.Add(new Student(){ StudentName = "Bill" });
     studentList.Add(new Student(){ StudentName = "Steve" });
     studentList.Add(new Student(){ StudentName = "Ram" });

      ViewData["studentsData"] = studentList;

      return View();
    }

     @* View *@
   @foreach (var std in ViewData["studentsData"] as                    
     IEnumerable<Mvc_DisplayFormating.Models.Student>)
 {
    <li>
        @std.StudentName
    </li>
  }
     </ul>

Answer 3

要将 ViewData 转换为视图，您只需运行一个 foreach 循环，获取 ViewData 的键并将其转换为包含学生模型的 IEnumerable 接口。

   @foreach (var std in ViewData["studentsData"] as                  
             IEnumerable<Mvc_DisplayFormating.Models.Student>)

Answer 4

<span>
    Hello @((ViewData["EmpData"] as AccountModel).Username)
</span>