MVC DisplayTemplate Not Rendering if Named for Interface

Question

I have a Model:

public class Dog: IPet
{
    // IPet Implementation
    public string Name { get; set; }
}

and a DisplayTemplate in DisplayTemplates/Dog.cshtml

@model IPet // note this is the interface, not the concrete Dog
<label>@Model.Name</label>

This works perfectly until I rename the file to IPet.cshtml; then the binding fails. I want to use the same DisplayTemplate for Dog, Cat, Rat, Goat and Gnu, all of which are implementations of IPet.

How can I get the binding to work?

How are you currently invoking the view in your controller? – Ben May 16 '19 at 23:35 — Ben, May 16 '19 at 23:35

vladimir · Accepted Answer · 2019-05-17T00:09:56.530

2

By default, the name of the view is the name of an object type that passed to template-helper. So need to explicitly define the template name:

@Html.DisplayFor(x => x.Dog, "IPet")

When need to render the model that contains IPet instances use UIHint-attribute:

public partial class Zoo
{
    [UIHint("IPet")]
    public Dog Dog;

}

Template:

@model Zoo
@Html.DisplayForModel()

edited May 17 '19 at 00:09

answered May 16 '19 at 23:52

vladimir

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Is there any way to customize the view creator (whatever that is) to check for the type declared as the `@model` _first_, then fallback to the default method of finding a display template? – Scott Baker May 17 '19 at 16:38

MVC DisplayTemplate Not Rendering if Named for Interface

1 Answers1