How to save changes to db, using mutliple models in one view?

Question

Hi team

 

I have multiple models in my View, the issue my form does not save to my db. I have before when used one it was saving well all changes to my db. Kindly please help me to improve my logic better and stuck.

 

// Controller
       //GET:TrainingRegForm/Create/WebRequest.
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult SubmitRegDetails([Bind(Include= "Id, Title, FirstName, LastName, Position, Company, StreetAddress, StreetAddressLine, City, StateProvince, ZipCode,Country,Email, CellNumber, DietaryRequirement")]TrainingRegForm eNtsaTraining)
        {
            this.ViewBag.SubmitRegDetails = this.SaveRegForm();

            if(ModelState.IsValid)
            {
                eNtsaTraining.Id = Guid.NewGuid();
                db.TrainingRegs.Add(eNtsaTraining);
                db.SaveChanges();
                return RedirectToAction("SaveRegForm");
            }

            // Validates when empty.
            if(ModelState.IsValid)
            {
                return RedirectToAction("SaveRegForm");
            }
            return View(eNtsaTraining);
        }
// Data-Access-Layer
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Entity;
using eNtsaRegistrationTraining.Models;

namespace eNtsaRegistrationTraining.DAL
{
    public class eNtsaRegistration:DbContext
    {

        public eNtsaRegistration() : base("eNtsaRegistration")
        {
        }  public DbSet<TrainingRegForm> TrainingRegs { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
        }
    }
 }

//  Models
namespace eNtsaRegistrationTraining.Models
{
    public class TrainingRegForm
    {
        [Key]
        public Guid? Id { get; set; }
        public string Title { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Position { get; set; }
        public string Company { get; set; }

        public string StreetAddress { get; set; }

        public string StreetAddressLine { get; set; }

        public string City { get; set; }
        public string StateProvince { get; set; }

        public int ZipCode { get; set; }

        public string Country { get; set; }

        public string Email { get; set; }

        [Required(ErrorMessage = "This field is required")]
        [DataType(DataType.PhoneNumber)]
        public string CellNumber { get; set; }
        public string DietaryRequirement { get; set; }
    }


    public class RegViewAndRoleViewModel
    {
        public DietViewModel DietMain { get; set; }

        public TrainingRegForm RegForm { get; set; }

       public DropDownViewModel ListCountries { get; set; }
        public RegistrationTrainingForm HomeModel { get; set; }
        public RoleViewModel RoleViewModelData { get; set; }


    }
// View
@using eNtsaRegistrationTraining.Models
@model RegViewAndRoleViewModel
@{
    ViewBag.Title = "SubmitRegDetails";
}

Its not sending to db, but if i am using one model(TbRegistrationForm only) it does save straight to my DB with all form fields.