自定义客户端验证（属性）不会在MVC 4中触发

Question

I write a code for validate the incoming data.

All of the built-in validation (RequiredAttribute etc) are works ...

But my own writed DateRangeAttribute doesnt triggers errors on post , and the post is comes to my controller :(.

The overrided IsValid method sends back the good(false) value, and on the server side the controller see correctly the Invalid ModelState, but the client side not.

The data validation attributes are rendered to HTML on the browser:

I would like the avoid the post until all of the data are realy valid.

There is the Code:

DateRangeAttribute

public class DateRangeAttribute : RangeAttribute
    {
        public DateRangeAttribute (string minimumYear) 
            :base(typeof(DateTime), minimumYear, DateTime.Now.Year.ToString())
        {
        }

        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            var inputYear = value as int?;
            var result = (inputYear != null && inputYear >= 1886 && inputYear <= DateTime.Now.Year);

            return result ? ValidationResult.Success : new ValidationResult(GetErrorMessage());
        }

        private string GetErrorMessage()
        {
            return "The year must be greater than 1886 and lower than the actual year.";
        }

        public override string FormatErrorMessage(string name)
        {
            return string.Format(GetErrorMessage(), name);
        }
    }

Create.cshtml

<script src="@Url.Content("~/Scripts/jquery-1.8.2.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

<!-- ... -->

@using (Html.BeginForm("Create", "Car", FormMethod.Post, new { id = "CreateForm" }))
{ 
    @Html.ValidationSummary(true)
    <!-- ... -->
        @Html.LabelFor(model => model.Year)
        @Html.EditorFor(model => model.Year)
        @Html.ValidationMessageFor(model => model.Year)
    <!-- ... -->
}

Web.Config file:
<configuration>
    <appSettings>
        <!-- ... -->
        <add key="ClientValidationEnabled" value="true" />
        <add key="UnobtrusiveJavaScriptEnabled" value="true" />
    </appSettings>
    <!-- ... -->
</configuration>

Answer 1

You also have to provide a custom client side validation implementation thru IClientValidatable . And because of that, I suggest that you inherit from ValidationAttribute directly since you will have to change almost everything anyway