AutoMapper:ForMember()和ForPath()有什么区别? [英] AutoMapper: What is the difference between ForMember() and ForPath()?

问题描述

我正在阅读AutoMapper的ReverseMap()，但无法理解ForMember()和ForPath()之间的区别.在此处中描述了实现.根据我的经验，我在ForMember()上取得了成就.

I am reading AutoMapper's ReverseMap() and I can not understand the difference between ForMember() and ForPath(). Implementations was described here. In my experience I achieved with ForMember().

在配置反向映射的地方，请参见以下代码:

See the following code where I have configured reverse mapping:

public class Customer
{
    public string Surname { get; set; }
    public string Name { get; set; }
    public int Age { get; set; }
}
public class CustomerDto
{
    public string CustomerName { get; set; }
    public int Age { get; set; }
}

static void Main(string[] args)
{
    Mapper.Initialize(cfg =>
    {
        cfg.CreateMap<Customer, CustomerDto>()
           .ForMember(dist => dist.CustomerName, opt => opt.MapFrom(src => $"{src.Surname} {src.Name}"))
            .ReverseMap()
            .ForMember(dist => dist.Surname, opt => opt.MapFrom(src => src.CustomerName.Split(' ')[0]))
            .ForMember(dist => dist.Name, opt => opt.MapFrom(src => src.CustomerName.Split(' ')[1]));
    });

    // mapping Customer -> CustomerDto            
    //... 
    //

    // mapping CustomerDto -> Customer
    var customerDto = new CustomerDto
    {
        CustomerName = "Shakhabov Adam",
        Age = 31
    };
    var newCustomer = Mapper.Map<CustomerDto, Customer>(customerDto);
}

正在工作.

ForMember和ForPath是否相同，或者何时应该在ForMember()上使用ForPath()?

Do ForMember and ForPath the same things or when should I use ForPath() over ForMember()?

推荐答案

在这种情况下，为避免不一致，ForPath在内部转换为ForMember.尽管@IvanStoev所说的是有道理的，但另一种查看方式是ForPath是ForMember的子集.因为您可以在ForMember中做更多的事情.因此，当您拥有成员时，请使用ForMember；当您拥有路径时，请使用ForPath:)

In this case, to avoid inconsistencies, ForPath is translated internally to ForMember. Although what @IvanStoev says makes sense, another way to look at it is that ForPath is a subset of ForMember. Because you can do more things in ForMember. So when you have a member, use ForMember and when you have a path, use ForPath :)

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