c# - AutoMapper-从ViewModel映射回DTO时，subObject保持为空

Question

我有这张 map :

Mapper.Initialize(cfg =>
{
    cfg.CreateMap<Sistema.DataEntities.Models.Cliente, CadastroModule.Model.Cliente>().ReverseMap();
});

CadastroModule.Model.Cliente(MVVM模型):

public class Cliente
{
    public int ClienteID { get; set; }
    public string Nome { get; set; }
    public string EnderecoCEP { get; set;}
    public string EnderecoBairro { get; set; }
    public string EnderecoLogradouro { get; set; }
    public int EnderecoNumero { get; set; }
    public string EnderecoComplemento { get; set; }
}

Sistema.DataEntities.Models(POCO):

public class Cliente : Entity
{
    public Cliente()
    {
        Endereco = new Endereco();
    }

    public int ClienteID { get; set; }

    public string Nome { get; set; }

    public Endereco Endereco { get; set; }//1 pra 1 (Complex type EF)
}

Sistema.DataEntities.Models(POCO):

public class Endereco : Entity
{
    public string CEP { get; set; }
    public string Bairro { get; set; }
    public string Logradouro { get; set; }
    public int Numero { get; set; }
    public string Complemento { get; set; }

}

当我尝试它运行完美时:

var t = _clienteService.ClienteService_GetAll().Project().To<Cliente>();

但是当我需要回到poco时会遇到麻烦:

Sistema.DataEntities.Models.Cliente clifinal = Mapper.Map<Cliente, Sistema.DataEntities.Models.Cliente>(ObCliente);

我的结果:

为什么Endereco对象具有空值？

Answer 1

Automapper并不是为“展开”对象而构建的。您的模型-> ViewModel映射按惯例工作；目标中的“Endereco”前缀告诉AutoMapper查找嵌套对象。

为了使它以另一种方式起作用，您必须手动添加从CadastroModule.Model.Cliente到Sistema.DataEntities.Models.Endereco的映射，然后在从CadastroModule.Model.Cliente到Sistema.DataEntities.Models.Cliente的反向映射中使用该映射:

cfg.CreateMap<Cliente, CadastroModule.Model.Cliente>()
    .ReverseMap()
    // Map the `Endereco` property from `Cliente`
    .ForMember(dest => dest.Endereco, opt => opt.MapFrom(src => src));

cfg.CreateMap<CadastroModule.Model.Cliente, Endereco>();
    .ForMember(dest => dest.Bairro, opt => opt.MapFrom(src => src.EnderecoBairro))
    .ForMember(dest => dest.CEP, opt => opt.MapFrom(src => src.EnderecoCEP))
    .ForMember(dest => dest.Complemento, opt => opt.MapFrom(src => src.EnderecoComplemento))
    .ForMember(dest => dest.Logradouro, opt => opt.MapFrom(src => src.EnderecoLogradouro))
    .ForMember(dest => dest.Numero, opt => opt.MapFrom(src => src.EnderecoNumero));

除了映射Endereco的每个属性，您还可以将Endereco注册为源前缀:

cfg.CreateMap<Cliente, CadastroModule.Model.Cliente>()
    .ReverseMap()
    .ForMember(dest => dest.Endereco, opt => opt.MapFrom(src => src));

cfg.RecognizePrefixes("Endereco");
cfg.CreateMap<CadastroModule.Model.Cliente, Endereco>();

提出的这种解决方案，我认为the author's post on two way mapping值得一读。本质上，AutoMapper并不是为映射回域实体而构建的。当然，您可以随意使用它，但这可以解释为什么不立即支持这种情况。