Show enum name value for corresponding Id in .NET Core

Question

I am developing a web application and .NET Core and recently bumped against this issue.

It shows the Id of the enum value in: @Html.DisplayFor(model => model.MutatieReden) but I want to show the name for the enum as this is a 'Details' view.

My enum is built like this, am I missing something?:

//Class property
public Reden? MutatieReden { get; set; }

//Enum
    public enum Reden
    {
        [Display(Name = "Niet van toepassing")] NietVanToepassing = 1,
        [Display(Name = "Administratieve reden")] AdministratieveReden = 2,
        [Display(Name = "Niet akkoord klant")] NietAkkoordKlant = 3,
        [Display(Name = "Incasso blokkade")] IncassoBlokkade = 4,
    }

I tried various solutions but most of them were for regular ASP.NET MVC and answers were all outdated.

EDIT: This is not a duplicate as this is for ASP.NET Core and the other solutions are for .NET MVC 5.1. Tried these solutions already.

By "name" here, do you actually mean `"Niet van toepassing"` etc? — Marc Gravell, Jun 11 '19 at 11:29
@MarcGravell yes, I want to show these values instead of the Id its giving me — Aids Jung, Jun 11 '19 at 11:29
@AidsJung , I tried to reproduce the issue with ASP.NET Core MVC 2.2 ,but the name of Display attribute showed well . [Here](https://microsoftapc-my.sharepoint.com/:u:/g/personal/v-xuelc_microsoft_com/EWBkn0TDA5BGoL1Qf18HLEgBAumDSFGhj7SEPZUj1kh4iQ?e=ddSEVv) is my test demo , you could check for the difference . If you could share the reproducible demo, it would help us provide effective suggestion. — Xueli Chen, Jun 12 '19 at 02:45

Hieu Le · Answer 1 · 2019-06-12T05:07:24.403

4

For display purpose, I think we can use:

@Html.Display(Model.MutatieReden.GetDisplayName())

Or you even can create extra properties for display only:

public string MutatieRedenText { get => this.MutatieReden.GetDisplayName(); }

Add this static method into a static class like public static class EnumHelper

public static string GetDisplayName(this Enum val)
    {
        return val.GetType()
                  .GetMember(val.ToString())
                  .FirstOrDefault()
                  ?.GetCustomAttribute<DisplayAttribute>(false)
                  ?.Name
                  ?? val.ToString();
    }

PS: I haven't tested with compiler but it probably works

edited Jun 12 '19 at 05:07

answered Jun 12 '19 at 05:01

Hieu Le

1,042
8
18

According to [this](https://learn.microsoft.com/en-us/dotnet/api/system.componentmodel.dataannotations.displayattribute.name?view=net-5.0) : _"Do not use this property to get the value of the Name property. Use the GetName method instead."_ However, that method will throw an exception if the attribute has not been set. – JHBonarius Aug 22 '21 at 11:49

score 1 · Accepted Answer · answered Jun 12 '19 at 08:16

1

There's no need in Display attribute at all:

Reden enum_value = Reden.AdministratieveReden;
string enum_name = Enum.GetName(typeof(Reden), enum_value);

answered Jun 12 '19 at 08:16

JohnyL

6,894
3
22
41

I benched this, and it's twice as slow as `enum_value.ToString()`. – JHBonarius Aug 22 '21 at 07:54

Show enum name value for corresponding Id in .NET Core

2 Answers2