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Editorial Team
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Asked: 2026-05-20T10:06:32+00:00

I’m using client-side, unobtrusive validation in MVC 3. I have a field called MinPrice

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I’m using client-side, unobtrusive validation in MVC 3. I have a field called MinPrice only decorated with DisplayName and Range attributes. But it is failing client-side validation saying “The MinPrice field is required”. I have no idea why and I definitely don’t have a required attribute anywhere applied to it.

    [DisplayName("Asking Price")]
    [Range(0, 99999999, ErrorMessage="Invalid number")]
    public int MinPrice { get; set; }

What’s causing it?

(Note: I can see the data-val-required=”The Minprice field is required” attribute rendered in the html source, so something to do with the new unobtrusive routines is putting it there). I don’t seem to have this problem with other fields..

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1 Answer

  1. Editorial Team

    FYI, This has nothing to do with Linq to SQL really.

    An implicit [Required] attribute is applied to MinPrice as it is an int which is, by definition, not-nullable (as opposed to int? which is nullable).

    This behaviour is implemented by

    DataAnnotationsModelValidatorProvider.AddImplicitRequiredAttributeForValueTypes

    which defaults to true.

    You can disable this behaviour by setting it to false in your Global.asax

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