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This might be a basic question but wondering I am not getting AutoMapper.Mapper.CreateMap method.

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Am I using wrong AutoMapper reference/package? Thanks

Sami
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4 Answers4

141

The static version of the CreateMap method was deprecated in 4.2, then removed from the API in version 5.0. Jimmy Bogard talks about this in more detail in this blog post.

The new technique for mapping is non-static, like this (code is from the post):

var config = new MapperConfiguration(cfg => {
    cfg.CreateMap<Source, Dest>();
});

IMapper mapper = config.CreateMapper();
var source = new Source();
var dest = mapper.Map<Source, Dest>(source);
Will Ray
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    Thanks Will, wondering if you can advise how to use .ForMember() method, as couldn't find exact answer for my needs. – Sami Jul 05 '16 at 03:22
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    Thank I found the way as below: might be helpful for others var configStack = new MapperConfiguration( cfg => { cfg.CreateMap().ForMember(dest => dest.stackId, opts => opts.MapFrom(src => src.itemId)) ; } ); – Sami Jul 05 '16 at 03:29
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    I've same issue, i have tried as you suggested but gives me an error `The type or namespace name 'MapperConfiguration' could not be found (are you missing a using directive or an assembly reference?)` and also same for `IMapper` Can you please help me. – Divyang Desai Nov 10 '16 at 06:54
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    Could I add all mapping config in one config for all of my model? – Master Programmer Jan 22 '17 at 13:04
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    @MasterProgrammer Yup! I most commonly see the configuration created as a static property with all the mappings created inside of it. – Will Ray Jan 22 '17 at 21:35
  • CreateMap(); – Abdullah Tahan Aug 15 '18 at 02:47
48

Here is how I used AutoMapper in my code.

Step 1 : Downloaded AutoMapper through nuget-packages.

Version is

<package id="AutoMapper" version="6.1.1" targetFramework="net452" />

Step 1 : Created DTO class 

public class NotificationDTO
{

    public DateTime DateTime { get; private set; }
    public NotificationType Type { get; private set; }
    public DateTime? OriginalDateTime { get; private set; }
    public string OriginalVenue { get; private set; }
    public ConcertDTO Concert { get; set; }
}

public class ConcertDTO
{
    public int Id { get; set; }
    public bool IsCancelled { get; private set; }
    public DateTime DateTime { get; set; }
    public string Venue { get; set; }

}

Step 2 : Created an AutoMapperProfile class which inherits from Profile

using AutoMapper;
using ConcertHub.DTOs;

namespace ConcertHub.Models
{
  public class AutoMapperProfile : Profile
  {
    public AutoMapperProfile()
    {
        CreateMap<Concert, ConcertDTO>();
        CreateMap<Notification, NotificationDTO>();
    }
  }
}

Step 3 : Registered AutoMapperProfile in the Application Start method of Global.asax file

protected void Application_Start()
    {
        AutoMapper.Mapper.Initialize(cfg => cfg.AddProfile<AutoMapperProfile>());

    }

Finally the magic piece of code in the Api Controller

public IEnumerable<NotificationDTO> GetNewNotification()
    {
        var userId = User.Identity.GetUserId();
        var notifications = _dbContext.UserNotifications
                .Where(un => un.UserId == userId && !un.IsRead)
                .Select(un => un.Notification)
                .Include(n => n.Concert)
                .ProjectTo<NotificationDTO>()//use Automapper.QueryableExtension namespace
                .ToList();

        return notifications;
    }

Hope it helps .

ksg
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19

Here is how it works now: 

        Mapper.Initialize(cfg =>
        {
            cfg.CreateMap<SupervisorEmployee, SupervisorViewModel>()
            .ForMember
                (dst => dst.Name, src => src.MapFrom<string>(e => SupervisorViewModel.MapName(e)))
            .ForMember
                (dst => dst.OfficePhone, src => src.MapFrom<string>(e => e.OfficePhone.FormatPhone(e.OfficePhoneIsForeign)))
            .ForMember
                (dst => dst.HomePhone, src => src.MapFrom<string>(e => e.HomePhone.FormatPhone(e.HomePhoneIsForeign)))
            .ForMember
                (dst => dst.MobilePhone, src => src.MapFrom<string>(e => e.MobilePhone.FormatPhone(e.MobilePhoneIsForeign)));
        });
Michael K
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1

I see your class didn't inherit from AutoMapper.Profile

I did this and worked for me

public class AutoMapperConfig: AutoMapper.Profile
Jason Chen
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