Hi everybody,

I have the following ViewModel:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using CardNumbers.Objects;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel;

using DataAnnotationsExtensions;
using System.ComponentModel.DataAnnotations.Schema;

namespace CardNumbers.Models
{
    public class ClientViewModel
    {
        public Client Client { get; set; }

        [Key]
        [Editable(false)]
        [Column("ClientId", TypeName = "int")]
        public virtual int? ClientId
        {
            get
            {
                if (Client == null)
                    return null;
                else
                    return Client.Id;
            }

            set { Client.Id = value ?? 0; }
        }
        [Required]
        [DisplayName("Client No")]
        [UIHint("Number")]
        [Column("client_no", TypeName = "smallint")]
        [Remote("doesClientNoExist", "Client", HttpMethod = "POST",
            AdditionalFields = "ClientId",
            ErrorMessage = "Client Number already exists. Please enter a different Client Number.")]
        public virtual Int16 Number
        {
            get
            {
                if (Client == null)
                    return 0;
                else
                    return Client.Number;
            }

            set { Client.Number = value; }
        }

        [Required]
        [Column("client_name", TypeName = "varchar")]
        [DisplayName("Client Name")]
        [MaxLength(30, ErrorMessage = "Client Name should not be longer than 30 characters")]
        [MinLength(3, ErrorMessage = "Client Name is too short")]
        [Remote("doesClientNameExist", "Client", HttpMethod = "POST", AdditionalFields = "ClientId",
            ErrorMessage = "Client Name already exists. Please enter a different Client Name.")]
        public virtual string Name
        {
            get
            {
                if (Client == null)
                    return "";
                else 
                    return Client.Name;            
            }

            set { Client.Name = value; }
        }

        public int id { get; set; }
    }
}

In the form I enter both required fields (Name and Client No) and go to save method. But the ModelState.IsValid returns false while error count is 0. How can I figure out why it is returning false?

Do you see what may be wrong with my implementation here? I am trying to expose Name and Number properties because I need them somehow for RemoteValidator and I can not make them work if I use them through Model.Clients. properties that's why I attempted to expose these two properties the way I did.

I added this

var errors = ModelState.SelectMany(x => x.Value.Errors.Select(z => z.Exception));

it it returned Count = 1
[0] null

which does not help me.

How can I know what is wrong with the model?