troubleshooting Question

Using AutoMapper with flattened, nested classes

Avatar of canuckconsulting
canuckconsultingFlag for United Kingdom of Great Britain and Northern Ireland asked on
.NET ProgrammingC#ASP.NET
4 Comments1 Solution483 ViewsLast Modified:
I am using AutoMapper 4.2 in my .net project and am having problems having flattened properties map from the ViewModel back to the View.   The property maps fine from View to ViewModel but not the other way around.

In the following example, Customer is configured as nested property of Order.  The associated ViewModel flattens Customer.Name to the CustomerName string property.

    public class Customer
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public decimal CreditLimit { get; set; }
        public decimal RemainingCredit { get; set; }
    }

    public class Order
    {
        public int Id { get; set; }
        public Customer Customer { get; set; }
        public int TotalQty { get; set; }
        public decimal TotalValue { get; set; }
        public DateTime ShipDate { get; set; }

        public Order()
        {
            Customer = new Customer();
        }
    }

    public class OrderViewModel
    {
        public int Id { get; set; }
        public string CustomerName { get; set; }
        public int TotalQty { get; set; }
    }

The below "Test Model => ViewModel" runs great with orderViewModel1.CustomerName set to "Abe Anton".  However the "Test ViewModel => Model" section does not work, with order2.Customer.Name set to Null.

            //set up automapper
            var config = new MapperConfiguration(cfg => {
                cfg.CreateMap<OrderViewModel, Order>();
                cfg.CreateMap<Order, OrderViewModel>();
            });
            var mapper = config.CreateMapper();

            //Test Model => ViewModel 
            var order1 = new Order();
            order1.Customer.Name = "Abe Anton";
            order1.TotalQty = 1;
            var orderViewModel1 = mapper.Map<OrderViewModel>(order1);

            //Test ViewModel => Model 
            var orderViewModel2 = new OrderViewModel();
            orderViewModel2.CustomerName = "Betty Basin";
            orderViewModel2.TotalQty = 2;
            var order2 = mapper.Map<Order>(orderViewModel2);
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