ASP.NET MVC Data Annotations Validation ErrorMessageResourceType

Question

When using Data Annotations Validation, everything works fine until I try to use resources.

Here's the error I get: The name 'ErrorMessageResourceType' does not exist in the current context.

And the code I used:

using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using Microsoft.Web.Mvc;

namespace Project.Models  
{  
    [MetadataType(typeof(LanguageMetaData))]
    public partial class Language
    {
    }

    public class LanguageMetaData
    {
        [Required(ErrorMessageResourceType(typeof(Resources.Errors)), 
                  ErrorMessageResourceName = "IdRequired")]
        public object Id { get; set; }

        [Required(ErrorMessageResourceType(typeof(Resources.Errors)), 
                  ErrorMessageResourceName = "NameRequired")]
        public object Name { get; set; }

        public object Flag { get; set; }
        public object IsDefault { get; set; }
    }
}

I can't find anything wrong with this. Can someone more experienced help me with what's wrong?

Thank you!

SolarBear · Accepted Answer · 2020-09-17 15:34:15Z

19

It has to be

ErrorMessageResourceType = typeof(Resources.Errors)

instead of

ErrorMessageResourceType(typeof(Resources.Errors))

This was a small big damn stupid mistake :D

Hope this helps anyone who had the same problem!

edited Sep 17, 2020 at 15:34

SolarBear

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answered Sep 11, 2009 at 14:34

Fabio Milheiro

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Comments

HMD · Accepted Answer · 2019-07-24 10:29:24Z

1

You need to use both ErrorMessageResourceType and ErrorMessageResourceName.

[EmailAddress(ErrorMessageResourceType = typeof(Resource),ErrorMessageResourceName = "Message_ValidEmail")]

edited Jul 24, 2019 at 10:29

HMD

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answered Jul 24, 2019 at 9:37

Shivam Dhagat

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Comments

Sergio M. · Accepted Answer · 2020-11-26 14:51:45Z

1

Using nameof instead of string is a better option with ErrorMessageResourceName .

This is an example:

[StringLength(maximumLength: 60, MinimumLength = 2, ErrorMessageResourceType = typeof(Resources.Register), ErrorMessageResourceName = nameof(Resources.Register.ChooseRole))]

answered Nov 26, 2020 at 14:51

Sergio M.

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