TryUpdateModel(order) returning false

Feb 17, 2013 at 7:23 PM
In the Checkout Controller I have the code
    [HttpPost]
    public ActionResult AddressAndPayment(FormCollection values)
    {
        var order = new Order();
        TryValidateModel(order);
     ....
The model looks like this
[Bind(Exclude="OrderId")]
public partial class Order
{
    [ScaffoldColumn(false)]
    public int OrderId { get; set; }

    [ScaffoldColumn(false)]
    public string Username { get; set; }

    [Required(ErrorMessage= "First Name is required")]
    [DisplayName("First Name")]
    [StringLength(160)]
    public string FirstName { get; set; }

    [Required(ErrorMessage = "Last Name is required")]
    [DisplayName("Last Name")]
    [StringLength(160)]
    public string LastName { get; set; }

    [Required(ErrorMessage="Address is required")]
    [StringLength(70)]
    public string Address { get; set; }

    [Required(ErrorMessage = "City is required")]
    [StringLength(40)]
    public string City { get; set; }

    [Required(ErrorMessage = "State is required")]
    [StringLength(40)]
    public string State { get; set; }

    [Required(ErrorMessage = "Postal Code is required")]
    [DisplayName("Postal Code")]
    [StringLength(10)]
    public string PostalCode { get; set; }

    [Required(ErrorMessage="Country is required")]
    [StringLength(40)]
    public string Country { get; set; }

    [Required(ErrorMessage= "Phone is required")]
    [StringLength(24)]
    public string Phone { get; set; }

    [Required(ErrorMessage="Email Address is required")]
    [DisplayName("Email Address")]
    [RegularExpression(@"[A-za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}", ErrorMessage="Email is not valid.")]
    [DataType(DataType.EmailAddress)]
    public string Email { get; set; }

    [ScaffoldColumn(false)]
    public decimal Total { get; set; }

    [ScaffoldColumn(false)]
    public DateTime OrderDate { get; set; }
    public List<OrderDetail> OrderDetails { get; set; }
}
I can stop right before the TryValidateModel line and look at form values like
? Request.Form["FirstName"]
 "Michael"
 ? values["FirstName"]
   "Michael"
So why does TryValidateModel(order); return false and the order object does not get populated?