在ViewBag馅匿名类型引起模型绑定问题

问题描述

有人可以告诉我什么，我做错了什么？ ： - ）

can someone tell me what I'm doing wrong? :-)

我有这个简单的查询：

 var sample = from training in _db.Trainings
              where training.InstructorID == 10
              select new { Something = training.Instructor.UserName };

和我通过这ViewBag。

And I pass this to ViewBag.

ViewBag.Sample = sample;

然后我想访问它在我看来是这样的：

Then I want to access it in my view like this:

@foreach (var item in ViewBag.Sample) {
    @item.Something
}

和我得到错误信息对象不包含'东西'的定义。如果我把那里只是 @item ，我得到的结果 {=东西SomeUserName}

And I get error message 'object' does not contain a definition for 'Something'. If I put there just @item, I get result { Something = SomeUserName }

感谢您的帮助。

推荐答案

这不能做。 ViewBag是动态的，问题是匿名类型作为内部产生的。我会用一个视图模型建议您：

This cannot be done. ViewBag is dynamic and the problem is that the anonymous type is generated as internal. I would recommend you using a view model:

public class Instructor
{
    public string Name { get; set; }
}

和则：

public ActionResult Index()
{
    var mdoel = from training in _db.Trainings
                 where training.InstructorID == 10
                 select new Instructor { 
                     Name = training.Instructor.UserName 
                 };
    return View(model);
}

和视图：

@model IEnumerable<Instructor>
@foreach (var item in ViewBag.Sample) {
    @item.Something
}

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