Wie die Umsetzung recaptcha in MVC 4 Projekt?

Okay, ich habe es herausgefunden. Diese tutorial ist sehr hilfreich, da die, die ich bereits in meinem ersten post nicht tun, einen guten job zu erklären. Hier sind meine cording codes:

ContactController:

[CaptchaValidator]
        [HttpPost]
        public ActionResult ContactForm(ContactModels model, bool captchaValid)
        {
            if (!captchaValid)
            {
                ModelState.AddModelError("captcha", "You did not type the verification word correctly. Please try again.");
            }
            else if(ModelState.IsValid)
            {
                MailMessage netMessage = new MailMessage();
                SmtpClient mailClient = new SmtpClient();
                try
                {
                    netMessage.From = new MailAddress("[email protected]");
                    netMessage.To.Add(new MailAddress(model.email));

                    netMessage.IsBodyHtml = true;
                    netMessage.Priority = MailPriority.High;
                    netMessage.Subject = "Subject: " + model.subject;
                    netMessage.Body = getMailBody(model.fstName, model.lstName, model.subject, model.phone, model.email, model.address, model.apartment, model.city, model.state, model.zipcode, model.country, model.comments);
                    mailClient.Send(netMessage);
                }
                catch (Exception error)
                {
                    Response.Write("Error sending email: " + error.Message + "<br /> StackTrace: " + error.StackTrace);
                }
                finally
                {
                    netMessage.Dispose();
                    netMessage = null;
                    mailClient = null;
                }

                return RedirectToAction("Index", "Home");
            }
            return View();
        }

Und hier ist meine Ansicht:

@using MvcReCaptcha.Helpers;

@{
    ViewBag.Title = "Contact";
    Layout = "~/Views/Shared/_FullPage.cshtml";
}

<h2>Contact Us</h2>
@using (Html.BeginForm())
{
    @Html.LabelFor(model => model.fstName)
    @Html.TextBoxFor(model => model.fstName)
    @Html.ValidationMessageFor(model => model.fstName)

    @Html.LabelFor(model => model.lstName)
    @Html.TextBoxFor(model => model.lstName)
    @Html.ValidationMessageFor(model => model.lstName)

    @Html.LabelFor(model => model.phone)
    @Html.TextBoxFor(model => model.phone)
    @Html.LabelFor(model => model.email)
    @Html.TextBoxFor(model => model.email)
    @Html.LabelFor(model => model.address)
    @Html.TextBoxFor(model => model.address)
    @Html.LabelFor(model => model.apartment)
    @Html.TextBoxFor(model => model.apartment)
    @Html.LabelFor(model => model.city)
    @Html.TextBoxFor(model => model.city)
    @Html.LabelFor(model => model.state)
    @Html.TextBoxFor(model => model.state)
    @Html.LabelFor(model => model.zipcode)
    @Html.TextBoxFor(model => model.zipcode)
    @Html.LabelFor(model => model.country)
    @Html.TextBoxFor(model => model.country)
    @Html.LabelFor(model => model.subject)
    @Html.TextBoxFor(model => model.subject)
    @Html.LabelFor(model => model.comments)
    @Html.TextAreaFor(model => model.comments)
    @Html.Raw(Html.GenerateCaptcha())
    @Html.ValidationMessage("captcha")
    <br />
    <button type="submit">Submit</button>
}

Bemerkt, die parameter in der @html.ValidationMessage übereinstimmt, die in der ModelStae.AddModelError. Ich hoffe das kann jemanden helfen der vielleicht das gleiche problem haben wie ich.