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Asked: 2026-06-13T01:38:21+00:00

Beside the annotation-based validation mechanism EF provides the so-called Facets. Meaning on a string

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Beside the annotation-based validation mechanism EF provides the so-called “Facets”. Meaning on a string property you could have a “Max Length” Facet (through the EF model configuration) where you specify a max-length of 80 chars. Most often this is done automatically by EF when you use a database first approach.

If now the property contains more than the specified number of chars, EF will throw a DbEntityValidationResult with the message

[PropName]: The field [PropName] must be a string or array type with a maximum length of ’80’.

My question: How can I localize such message??? I’d need it in german and italian as well…

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1 Answer

  1. Editorial Team

    Maarten Balliauw wrote a blog blog about it:

    Localize ASP.NET MVC 2 DataAnnotations validation messages

    Update your classes to use the ErrorMessageResourceType and ErrorMessageResourceName parameters instead of the ErrorMessage parameter that you normally pass.

    Also, you can localize your DisplayNameAttributes; here’s a Stackoverflow post which explains how to do it: Localization of DisplayNameAttribute

    Update

    I think if you install the .NET Framework Language Pack these standard messages should be translated for you.

    A caveat (happened to me): ASP.NET MVC 3 localized validation messages work on my machine, but not on server

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