.net 如何映射嵌套类型

我在做三级映射时遇到问题。课程如下：

public class Company {
    public Contact MainContact { get; private set; }
}


public class Contact {
    public PersonsName ContactName { get; private set; }
}

public  class PersonsName  {
    public String FirstName { get; private set; }
    public String LastName { get; private set; }

}

public class CreateCompanyViewModel {
    [Required]
    [MaxLength(25, ErrorMessage = "Only 25 characters are allowed.")]
    [Display(Name = "First Name")]
    public String FirstName { get; set; }

    [Required]
    [MaxLength(25, ErrorMessage = "Only 25 characters are allowed.")]
    [Display(Name = "Last Name")]
    public String LastName { get; set; }
}

我尝试了以下方法，但没有成功：

Mapper.CreateMap<CreateCompanyViewModel, PersonsName>()
    .ForMember(dest => dest.FirstName, opt => opt.MapFrom(src => src.FirstName))
    .ForMember(dest => dest.LastName, opt => opt.MapFrom(src => src.LastName));

Mapper.CreateMap<Contact, PersonsName>()
    .ForMember(dest => dest.FirstName, opt => opt.MapFrom(src => src.ContactName.FirstName))
    .ForMember(dest => dest.LastName, opt => opt.MapFrom(src => src.ContactName.LastName));

Mapper.CreateMap<CreateCompanyViewModel, Company>()
    .ForMember(dest => dest.MainContact.ContactName.FirstName, opt => opt.MapFrom(src => src.FirstName))
    .ForMember(dest => dest.MainContact.ContactName.FirstName, opt => opt.MapFrom(src => src.LastName));

Mapper.CreateMap（）
.ForMember（dest=>dest.FirstName，opt=>opt.MapFrom（src=>src.FirstName））
.ForMember（dest=>dest.LastName，opt=>opt.MapFrom（src=>src.LastName））；
Mapper.CreateMap（）
.FormMember（dest=>dest.FirstName，opt=>opt.MapFrom（src=>src.ContactName.FirstName））
.ForMember（dest=>dest.LastName，opt=>opt.MapFrom（src=>src.ContactName.LastName））；
Mapper.CreateMap（）
.ForMember（dest=>dest.MainContact.ContactName.FirstName，opt=>opt.MapFrom（src=>src.FirstName））
.ForMember（dest=>dest.MainContact.ContactName.FirstName，opt=>opt.MapFrom（src=>src.LastName））；

我收到的错误消息是：

表达式'dest=>dest.MainContact.ContactName.FirstName'必须解析为顶级成员，而不是任何子对象的属性。在子类型或AfterMap选项上使用自定义解析器。

---

参数名称：lambdaExpression

您可以使用以下配置：

/* Innermost mapping */
Mapper.CreateMap<CreateCompanyViewModel, PersonsName>();
// You don't need the individual member mappings since the names match.

/* Second-level */
Mapper.CreateMap<CreateCompanyViewModel, Contact>()
    .ForMember(dest => dest.ContactName, opt => opt.MapFrom(src => src));

/* Top level */
Mapper.CreateMap<CreateCompanyViewModel, Company>()
    .ForMember(dest => dest.MainContact, opt => opt.MapFrom(src => src));

用法：

Mapper.CreateMap<CreateCompanyViewModel, Contact>()
    .ForMember(dest => dest.ContactName, opt => opt.MapFromSelf());

Mapper.CreateMap<CreateCompanyViewModel, Company>()
    .ForMember(dest => dest.MainContact, opt => opt.MapFromSelf());

Mapper.CreateMap（）
.FormMember（dest=>dest.ContactName，opt=>opt.MapFromSelf（））；
Mapper.CreateMap（）
.ForMember（dest=>dest.main联系人，opt=>opt.MapFromSelf（））；

标题可能重复这是一个误导，实际上这是一个关于映射到多个类的问题，所有这些类都在顶层。您能否显示

CreateCompanyViewModel

？添加了CreateCompanyViewModel，但不知何故忽略了oops。谢谢Andrew。周一晚些时候才有机会尝试，但看起来很有趣！干杯，安德鲁，施了魔法。有一种感觉，解决方案会很简单（也许不是那么明显：）

Mapper.CreateMap<CreateCompanyViewModel, Contact>()
    .ForMember(dest => dest.ContactName, opt => opt.MapFromSelf());

Mapper.CreateMap<CreateCompanyViewModel, Company>()
    .ForMember(dest => dest.MainContact, opt => opt.MapFromSelf());