Question

I am new to automapper. need some help to map from ViewModel to Entity.

Here’s my user entity

public class User
{
    public int Id { get; set; }
    public string Firstname { get; set; }
    public string Lastname { get; set; }

    public DateTime CreatedDate { get; set; }
    public string DisplayName { get; set; }
}

here’s my ViewModel

public class UserViewModel
{

    public string Email { get; set; }
    public string Password { get; set; }
}

I create a map. its not working

        CreateMap<UserLoginViewModel, User>()
            .ForMember(dest=>dest.CreatedDate, DateTime.Now)
            .ForMember(dest=>dest.DisplayName, "");

DisplayName and CreatedDate are required fields. since its not in the ViewModel, I will make DisplayName = “” and CreateDate = datetime.now.

I want to know if I can do it using the automapper, or I have to do it after the mapping.

please show me some sample code.

Answer 1

You mentioned that you have UserViewModel view model and User entity however your mapping configuration contains third type – UserLoginViewModel. Supposing that UserLoginViewModel is the same as UserViewModel, you should change you configuration as below.

 Mapper.CreateMap<UserViewModel, User>()
        .ForMember(dest=>dest.CreatedDate, t=> t.MapFrom(s=> DateTime.Now))
        .ForMember(dest=>dest.DisplayName, t=> t.MapFrom(s=> ""));

AutoMapper wiki.