AutoMapper取消展平相同类型的复杂对象 [英] AutoMapper unflattening complex objects of same type

问题描述

我在映射以下复杂类型时遇到问题:

I have a problem mapping the following complex types:

RequestDTO
{
    int OldUserId;
    string OldUsername;
    int NewUserId;
    string NewUsername;
}

Request
{
    User OldUser;
    User NewUser;
}

User
{
    int UserId;
    string Username;
}

将Request映射/展平到RequestDTO很容易.但是如何展开该对象?

Mapping/flattening Request to RequestDTO is easy. But how to unflatten this object?

推荐答案

假定您将类和字段公开，下面的示例演示如何在AutoMapper中处理此问题.您需要告诉它如何从dto重构复杂类型.

Assuming that you make your classes and fields public, the example below shows how to handle this in AutoMapper. You need to tell it how to reconstruct your complex types from the dto.

        Mapper.CreateMap<RequestDTO, Request>()
            .ForMember(request => request.OldUser,
                mappingOption =>
                    mappingOption.MapFrom(dto => new User {UserId = dto.OldUserId, Username = dto.OldUsername}))
            .ForMember(request => request.NewUser,
                opt => opt.MapFrom(dto => new User {UserId = dto.NewUserId, Username = dto.NewUsername}));

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