自动映射器从嵌套类映射到单个(拼合) [英] Automapper map from nested class to single (flatten)

问题描述

这是我的出处:

public class User
{
    public int UserId { get; set; }

    public Address Address { get; set; }
}

public class Address
{
    public string Address { get; set; }
    public string State {get; set; }
}

这是我的目的地:

public class UserVM
{
    public int UserId { get; set; }

    public string Address { get; set; }
    public string State { get; set; }
}

如何进行映射?当他们说展平是自动的时，普通的创建贴图不起作用.

How do I do the mapping? The normal create map doesn't work when they say flattening is automatic.

推荐答案

如果将目标类的属性名称更改为AddressStreet和AddressState，则AutoMapper将按照约定将它们与Address.Street和Address.State匹配.在源头上.

If you change your destination class property names to AddressStreet and AddressState, AutoMapper will, by convention, match them to Address.Street and Address.State on the source.

public class UserVM
{
    public int UserId { get; set; }

    public string AddressStreet { get; set; } // User.Address.Street
    public string AddressState { get; set; }  // User.Address.State
}

或者，您保留目标属性名称不变，并使用自定义成员映射:

Alternatively, you leave your destination property names as is and use custom member mappings:

Mapper.CreateMap<User, UserVM>()
    .ForMember(dest => dest.Street, opt => opt.MapFrom(src => src.Address.Street))
    .ForMember(dest => dest.State, opt => opt.MapFrom(src => src.Address.State));

有关 Projection 和

See the AutoMapper documentation for Projection and Flattening for more information.

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