MVC 4 - DataAnnotations - Validation for Type

Question

I have the following code working

    [Required(ErrorMessage = \"Price is required.\")]
    [Range(typeof(Decimal), \"1\", \"9999\", ErrorMessage = \"Price xx.xx         


        

Answer 1

I think you may be tripping over a bug in jQuery. That validation is fighting the stuff emitted for your validation attributes.

I have the following property:

[Display(ResourceType = typeof(TaxSetupResources), Name = "Model_Value")]
[RegularExpression(@"(^\d+$)|(^\.\d{1,4}$)|(^\d*\.\d{0,4}$)", ErrorMessageResourceName="Model_InvalidFormatForAmount", ErrorMessageResourceType=typeof(TaxSetupResources))]
public decimal? Value { get; set; }

Used in a view like this:

    @Html.TextBoxFor(t => t.Tiers[i].Value, new { title = @Resources.TaxSetupResources.Model_ValueTip })
    
@Html.ValidationMessageFor(t => t.Tiers[i].Value)

Just by itself, a value "foo" yields my error message. A value 0.075 is accepted. A value of .075 yields "The field Value must be a number", the same issue you seem to be having.

based on this SO article, I added the following in document ready:

$(function () {
    $.validator.methods.number = function (value, element) {
        return parseFloat(value).toString() !== "NaN";
    }
});

Now I only get my error message, and only when expected (.075 is accepted).