Hi,

I am trying to get my head around models and controllers by trying to implement a basic contact form. Here's what I've done so far:

ContactFormViewModel.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace ContactForm.Models
{
    public class ContactFormViewModel
    {
        public string Name { get; set; }
        public string Email { get; set; }
        public string Message { get; set; }
    }
}

ContactFormController.cs

 using ContactForm.Models;
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net.Mail;
 using System.Web;
 using System.Web.Mvc;
 using Umbraco.Web.Mvc;


 namespace ContactForm.Controllers
 {
     public class ContactFormController : SurfaceController
     {

        [HttpPost]
        public ActionResult SendMail(ContactFormViewModel model)
        {
            if (!ModelState.IsValid)
                return CurrentUmbracoPage();

            if (ModelState.IsValid)
            {
                string s;
                s = $"<p>Name: {model.Name}</p> <p>Email: {model.Email}</p> <p>Message: {model.Message}</p>";

                MailMessage msg = new MailMessage();

                msg.From = new MailAddress("[email protected]");
                msg.To.Add("[email protected]");
                msg.Subject = "Message from WSHA contact form";
                msg.Body = s;
                msg.Priority = MailPriority.Normal;

                SmtpClient client = new SmtpClient();

                client.DeliveryMethod = SmtpDeliveryMethod.Network;
                client.UseDefaultCredentials = true;
                client.Send(msg);
             }

            return RedirectToCurrentUmbracoPage();

        }
    }
}

ContactForm.cshtml

@model ContactForm.Models.ContactFormViewModel

@using (Html.BeginUmbracoForm("SendMail", "ContactForm", FormMethod.Post))
{
    <div>
        @Html.TextBoxFor(m => m.Name)
    </div>
    <div>
        @Html.TextBoxFor(m => m.Email)
    </div>
    <div>
        @Html.TextAreaFor(m => m.Message)
    </div>
    <input type="submit" name="Submit" value="Submit" />
}

When I try to preview the page I have inserted the partial ContactForm.cshtml into I get this error message:

The model item passed into the dictionary is of type 'Umbraco.Web.Models.RenderModel', but this dictionary requires a model item of type 'ContactForm.Models.ContactFormViewModel'.

I've had a look at several posts on similar errors but I can't work out what's wrong here. Probably obvious but it's passing me by.

Any help gratefully received, cheers, Alistair