MVC Remote validation (unique email address)

Question

I'm currently working on a registration page where the users enter their email address. I want every email to be unique.

This is a part of my RegisterModel:

    [Required()]
    [System.Web.Mvc.Remote("IsUserEmailAvailable", "Account")]
    [EmailAddress()]
    [DataType(DataType.EmailAddress)]
    [Display(Name = "Email")]
    public string Email { get; set; }

..

This is a part of my accountcontroller:

    public JsonResult IsUserEmailAvailable(string UserEmail)
    {
        return Json(!db.UserProfiles.Any(User => User.UserName == UserEmail),       JsonRequestBehavior.AllowGet);
    }

This my my view:

<script src="~/Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>
<script src="~/Scripts/jquery.validate.min.js" type="text/javascript"></script>
<script src="~/Scripts/jquery.validate.unobtrusive.min.js" type="text/javascript"></script>


<hgroup class="title">
    <h1>Create Account</h1>
</hgroup>

@using (Html.BeginForm()) {
    @Html.AntiForgeryToken()
    @Html.ValidationSummary()

    <fieldset>
        <legend>Registration Form</legend>
        <ol>
            <li>
                @Html.LabelFor(m => m.UserName)
                @Html.TextBoxFor(m => m.UserName)
            </li>
            <li>
                @Html.LabelFor(m => m.Password)
                @Html.PasswordFor(m => m.Password)
            </li>
            <li>
                @Html.LabelFor(m => m.ConfirmPassword)
                @Html.PasswordFor(m => m.ConfirmPassword)
            </li>
            <li>
                @Html.LabelFor(m => m.Email)
                @Html.TextBoxFor(m => m.Email)
            </li>
            <li>
                @Html.LabelFor(m => m.ConfirmEmail)
                @Html.TextBoxFor(m => m.ConfirmEmail)
            </li>
        </ol>
        <input type="submit" value="Registrera" />
    </fieldset>
}

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
}

If I remove the [System.Web.Mvc.Remote("IsUserEmailAvailable", "Account")] everything is fine except the emailaddress wont be unique. With it, when I press the Submit, nothing happens.

Have I missed anything?

Answer 1

@Daniel J.G. is correct. Adding [AllowAnonymous] to the function makes it accessible.