unobtrusive client validation using fluentvalidation and asp.net mvc LessThanOrEqualTo not firing

Question

I have the following rules

the 1st does work using unobtrusive, client side validation, the second does not

any ideas why?

RuleFor(x => x.         


        

Answer 1

Darin's example has some obsolete stuff in it, so here is a more updated example that I have that does number comparisons. You can easily tweak it for date comparisons though:

Javascript:

(function ($)
{
    $.validator.addMethod("lessthanorequal", function(value, element, param)
    {
        return this.optional(element) || parseFloat(value) <= parseFloat(param);
    }, "Must be less than");

    $.validator.unobtrusive.adapters.add("lessthanorequal", ["field"], function (options)
    {
        options.rules["lessthanorequal"] = options.params.field;
        if (options.message) options.messages["lessthanorequal"] = options.message;
    });
})(jQuery);

C#

public class LessThanOrEqualPropertyValidator : FluentValidationPropertyValidator
{

    public LessThanOrEqualPropertyValidator(ModelMetadata metadata, ControllerContext controllerContext, PropertyRule rule, IPropertyValidator validator)
        : base(metadata, controllerContext, rule, validator)
    {
    }

    public override IEnumerable GetClientValidationRules()
    {
        if (!ShouldGenerateClientSideRules()) yield break;

        var formatter = new MessageFormatter().AppendPropertyName(Rule.PropertyName);
        string message = formatter.BuildMessage(Validator.ErrorMessageSource.GetString());
        var rule = new ModelClientValidationRule
        {
            ValidationType = "lessthanorequal",
            ErrorMessage = message
        };

         rule.ValidationParameters["field"] =  ((LessThanOrEqualValidator)Validator).ValueToCompare;
        yield return rule;
    }
}

Global.asax Application_Start:

FluentValidation.Mvc.FluentValidationModelValidatorProvider.Configure(x =>
{
    x.Add(typeof(LessThanOrEqualValidator), (metadata, context, description, validator) => new LessThanOrEqualPropertyValidator(metadata, context, description, validator));
});

So now any number rule that uses LessThanOrEqual will be validated client side.