为什么 Display(Name = "") 属性在我的一个 ViewModel 中被忽略，而它似乎在我的 ASP.NET MVC5 中的其他模型中工作？

Question

I have a viewmodel BeerNamePartialVM which has a property with a [Display(Name = "")] attribute that doesn't seem to work. I've also included my base model which also has a property with a [Display(Name = "")] attribute, which does work:

public class BeerNamePartialViewModel : IPartialPropertySearch
{
    [Required(ErrorMessage = "This field is required")]
    [Display(Name = "Name or partial name")]
    //[DisplayName("Name or partial name")]
    public string PartialName { get; set; }
    ...
}

public class BierProperties
{
    [Required, StringLength(50), Display(Name = "Name")]
    public string Naam { get; set; }
    ...
}

The two highlighted texts are generated with DisplayNameFor HtmlHelper functions shown below:

@model MVCBierApplication.Interfaces.IPartialPropertySearch
@Html.DisplayNameFor(f => f.PartialName)
@Html.EditorFor(f => f.PartialName)
@Html.ValidationMessageFor(f => f.PartialName)
...

@{Beer emptyModel = new Bier();}
@if (Model.Results != null && Model.Results.Count() != 0)
{
    <thead>
        <tr>
            <td>@Html.DisplayNameFor(h => Model.emptyModel.Naam</td>
            ...
        </tr>
        ...

the emptyModel is an empty model of type Beer, which I use to build the table header. This was neccecary because my view has the interface IPartialPropertySearch as its model, which returns the results in an IEnumerable of type Object instead of Beer. This was done because I want to reuse my code for models other than Beer.

The result looks like this (this is my first question so I didn't have enough reputation to display the images in-post):

Notice the highlighted labels. The label above the textbox seems to ignore it's property's [Display] attribute, while the label in the table header works as expected.

I've also tried to use the [DisplayName("name")], first on its own and then even together with [Display(Name =)] but neither seem to work. I've restarted my IIS server, cleared my browser's cache and ran the app in four different browsers, all of which give the same result.

The [Required] attribute does work, when I submit the form without entering a name, the errormessage set in the [required] tag gets shown. The only properties that are getting ignored are those that alter the name:

I've also included a link to the project's repository in case my images weren't clear enough or if you want to test this yourself. Some parts might be in Dutch but I think it should be clear enough. There's also an SQL file included in the repository to recreate the database I'm using.

Answer 1

I think this is because your model is referencing the interface and not the class. @model MVCBierApplication.Interfaces.IPartialPropertySearch change it to @model MVCBierApplication.Models.BeerNamePartialViewModel