AutoMapper和"UseDestinationValue" [英] AutoMapper and "UseDestinationValue"

问题描述

UseDestinationValue做什么?

What does UseDestinationValue do?

我之所以问是因为我有一个基类和继承的类，对于基类，我希望让AutoMapper为我获取现有的值.

I am asking because I have a base and inherited class, and for the base class, I would love to have AutoMapper take existing values for me.

它会这样做吗? (我已经看过了，我可以看到的UseDestinationValue的唯一示例涉及列表.它仅适用于列表吗?

Will it do that? (I have looked and the only examples I can see for UseDestinationValue involve lists. Is it only for lists?

我能这样做吗?

PersonContract personContract = new PersonContract {Name = 'Dan'};
Person person = new Person {Name = "Bob"};
Mapper.CreateMap<PersonContract, Person>()
      .ForMember(x=>x.Name, opt=>opt.UseDestinationValue());

person = Mapper.Map<PersonContract, Person>(personContract);

Console.WriteLine(person.Name);

输出是bob吗?

推荐答案

我写下了整个问题，然后想到了，DUH！只需运行它，看看.

I wrote this whole question up and then thought, DUH! just run it and see.

它如我所愿.

这是我最终得到的代码:

This is the code I ended up with:

class Program
{
    static void Main(string[] args)
    {
        PersonContract personContract = new PersonContract {NickName = "Dan"};
        Person person = new Person {Name = "Robert", NickName = "Bob"};
        Mapper.CreateMap<PersonContract, Person>()
            .ForMember(x => x.Name, opt =>
                                        {
                                            opt.UseDestinationValue();
                                            opt.Ignore();
                                        });

        Mapper.AssertConfigurationIsValid();

        var personOut = 
            Mapper.Map<PersonContract, Person>(personContract, person);

        Console.WriteLine(person.Name);
        Console.WriteLine(person.NickName);

        Console.WriteLine(personOut.Name);
        Console.WriteLine(personOut.NickName);
        Console.ReadLine();
    }
}

internal class Person
{
    public string Name { get; set; }
    public string NickName { get; set; }
}

internal class PersonContract
{
    public string NickName { get; set; }
}

输出为:

罗伯特
丹
罗伯特
丹

Robert
Dan
Robert
Dan

这篇关于AutoMapper和"UseDestinationValue"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！