首页 \ 问答 \ 为什么不使用EditorForModel()显示集合(Why is collection not being displayed using EditorForModel())

为什么不使用EditorForModel()显示集合(Why is collection not being displayed using EditorForModel())

我想使用EditorForModel()显示一个集合。

根据布拉德威尔逊的博客,这应该是一个没有脑子的人。 但是,它对我不起作用。

控制者:

 public ActionResult Index() {

        var contact = new Contact() { FirstName = "Greg", LastName = "Gum", Age = 27 };
        contact.PhoneNumbers = new List<string>();
        contact.PhoneNumbers.Add("111");
        contact.PhoneNumbers.Add("222");
        return View(contact);
    }

班上:

public class Contact
{

    public string FirstName { get; set; }
    public string LastName { get; set; }
    public int Age { get; set; }

    public List<String> PhoneNumbers { get; set; } 

}     

风景:

@model WebApplication33.Models.Contact

@Html.DisplayForModel()

这显示其他属性就好了,但不显示集合。 如何显示该集合? 我已经尝试并试图让它工作,因为我读过的所有内容似乎都说这应该像上面那样工作。


I would like a collection to be displayed using EditorForModel().

According to this Blog from Brad Wilson this should be a no brainer. However, it just does not work for me.

The Controller:

 public ActionResult Index() {

        var contact = new Contact() { FirstName = "Greg", LastName = "Gum", Age = 27 };
        contact.PhoneNumbers = new List<string>();
        contact.PhoneNumbers.Add("111");
        contact.PhoneNumbers.Add("222");
        return View(contact);
    }

The Class:

public class Contact
{

    public string FirstName { get; set; }
    public string LastName { get; set; }
    public int Age { get; set; }

    public List<String> PhoneNumbers { get; set; } 

}     

The View:

@model WebApplication33.Models.Contact

@Html.DisplayForModel()

This displays the other properties just fine, but not the collection. How do I get the collection to display? I have tried and tried to get this to work, as all the things I have read seem to say this should work just as the above.


原文:https://stackoverflow.com/questions/22512630
更新时间:2023-05-14 21:05

最满意答案

我可以验证您的代码在VS 2012上运行正常。您还应该验证其他一些内容。

  • 确保解决方案中的所有相关项目都已设置为构建。
  • 确保如果基础项目包含某些引用(如System.Web.Extensions),则依赖项目也必须包含相同的引用。

上面的第二点会导致一些非常模糊的错误,而不是明确错误所在。


I have coincidentally stumbled upon why the one enum exists in the namespace while the other one does not.

It looks like the enums declared in the Web Project will not automatically be made available in the Silverlight project. Only if the enum is used somewhere in the Web Project will it actually be included in the namespace and thus be available in the Silverlight project. I'm not sure if this is as per design or is actually a bug in Silverlight.

I was using the "AccountStatus" enum as a variable somewhere inside my Web Project while I wasn't using the "Gender" enum. That is why the one was available and the other not.

What I did to solve the problem was simply to declare a variable of type "Gender" inside one of the functions in my DomainContext class even though I do nothing with it further than just declaring it (I don't think it HAS to be in the DomainContext class - I expect that it will work as long as you declare such a variable in any class in your Web Project.)

(For reference, the way I declared it was to define a function that simply expected the "Gender" as a variable):

public void DoNothingWithGender(Gender myGender) { /* Do nothing */ }

Once I declared this, the Gender enum was available in my Silverlight project. If I DON'T declare such a variable in the Web Project, the enum is not made available to the Silverlight project. Weird behavior, indeed, but this is what solved my problem.

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