Implement Viewmodel in MVC Asp.net

When we have to display the data from multiple classes in single page. A view model represents only the data that you want to display on your view/page, whether it be used for static text or for input values (like textboxes and dropdowns). I have shown you example .It  is usesd t o pass the data strongly  type . Here is example is given below

public class ShoppingCart

    {

        public int ProductId { get; set; }

        public string ProductName { get; set; }

        public int Quantity { get; set; }

        public decimal UnitPrice { get; set; }

        public decimal TotalPrice { get; set; }

    }

    public class ShoppingCartViewModel

    {

        public ShoppingCartViewModel()

        {

            _shoppingCartItem = new List<ShoppingCart>();

        }

        public decimal AllTotal { get; set; }

        public decimal AllTotalWithVat { get; set; }

        public List<ShoppingCart> _shoppingCartItem { get; set; }

    }

Above two classes ShoppingCart and ShoppingCartViewModel . ShoppingCartViewModel class contains own properties and shopping cart items .So we called this class viewmodel

public ActionResult Index()

        {

            ShoppingCartViewModel obj = new ShoppingCartViewModel();//you have fillup class

            return View(obj) ;

        }

So we have return strongly type model from controller .now we have to display the view

In this way we have used the viewmodel in mvc asp.net