Automapper 5.0 global configuration

问题:

I am using the code below in AutoMapperConfig.cs in App_Start folder. I initialized it in Global.asax as AutoMapperConfiguration.Configure()

But I am unable to use the Mapper.Map<Hospital, MongoHospital> in my controller. It is throwing an exception that no mappings are defined. It was working in previous versions of Automapper which were supporting Mapper.CreateMap<> methods. I am confused how to use MapperConfiguration instance.

public static class AutoMapperConfiguration
{
    public static void Configure()
    {
        Mapper.Initialize(
            cfg =>
                {
                    cfg.AddProfile<HospitalProfile>();
                }
        );
        Mapper.AssertConfigurationIsValid();
    }
}

public class HospitalProfile : Profile
{
    protected override void Configure()
    {
        var config = new MapperConfiguration(
            cfg =>
                {
                    cfg.CreateMap<Hospital, MongoHospital>()
                        .ForMember(dest => dest.Id, opt => opt.MapFrom(src => src.Id.ToString()));
                });
        config.CreateMapper();
    }
}

Trying to access this map as below

Mapper.Map<IEnumerable<Hospital>, IEnumerable<MongoHospital>>(hospitalsOnDB);

回答1:

Do you actually need to use a Profile in this scenario? If you don't, you can try just initialising the Mapper like this:

public static class AutoMapperConfiguration
{
    public static void Configure()
    {
        Mapper.Initialize(
            config =>
            {
                config.CreateMap<Hospital, MongoHospital>()
                    .ForMember(dest => dest.Id, opt => opt.MapFrom(src => src.Id.ToString()));
            });
    }
}

However, if you would like to still register a Profile, you can do this:

public static class AutoMapperConfiguration
{
    public static void Configure()
    {
        Mapper.Initialize(
            cfg =>
            {
                cfg.AddProfile<HospitalProfile>();
            }
        );
    }
}

public class HospitalProfile : Profile
{
    protected override void Configure()
    {
        CreateMap<Hospital, MongoHospital>()
                .ForMember(dest => dest.Id, opt => opt.MapFrom(src => src.Id.ToString()));
    }
}

Hope this helps. If you're using AutoMapper 5.0, remember that this is still at beta-1 at this point in time.

回答2:

You can use this with AutoMapper 5.2.

Your Profile class as below

public class MapperProfile: Profile
{
    public MapperProfile()
    {
        CreateMap<Hospital, MongoHospital>().ReverseMap();
    }

}

Then in your Global.asax

     protected void Application_Start()
     {
       //Rest of the code 
       Mapper.Initialize(c => c.AddProfiles(new string[] { "DLL NAME OF YOUR PROFILE CLASS" }));
     }

Now when you need to create an instance

AutoMapper.Mapper.Instance.Map<MongoHospital, Hospital>(source, new Hospital());

Hope this helps.