如果项目等效，则将项目从一个类映射到另一类 [英] Mapping items from one class to another if Items are equivalent

问题描述

说我有一个看起来像这样的class:

Say I have one class that looks like this:

public class Person
{
     public string Name {get; set;}
     public int Number {get; set;}
}

另一个看起来像这样:

public class Dog
{
     public string Name {get; set;}
     public int Number {get; set;}
}

它们是两个不同的类，但是它们恰好具有完全相同的元素(称为Name的字符串和称为Number的整数)

They are two different classes, but they happen to have the exact same elements (a string called Name and an int called Number)

如果我有一个Person实例，然后用相同的Name和Number创建一个Dog实例，那么C#中是否有一种简便的方法?

Is there an easy way in C# to, say, if I had an instance of Person to then create an instance of Dog with the same Name and Number?

例如，如果我有:

Person person = new Person();
person.Name = "George";
person.Number = 1;

我知道我不能简单地去:

I know I can't simply go:

Dog dog = person;

因为它们是两种不同的类型.但是C#中有一种方法可以检查哦，如果它们具有相同的元素，请将Dog的相同元素设置为等于Person的元素. 但是我觉得必须比做类似的事情更简单的方法:

Because they are two different types. But is there a way in C# to check "oh, if they have the same element, set the same elements of Dog to equal that of Person. But I feel there has to be an easier way than doing something like:

dog.Name = person.Name;
dog.Number = person.Number;

尤其是如果类具有很多元素.另外，如果有人想知道，这两个不同的类位于API的两个不同部分中，因此我不能简单地使它们彼此相关.

Especially if the class has a LOT of elements. Also if anyone is wondering, these two different classes are in two different pieces of the API, so I can't simply make them related either.

推荐答案

您可以使用 AutoMapper :

public Dog UsingAMR(Person prs)
{
    var config = new MapperConfiguration(cfg =>
    {
        cfg.CreateMap<Person, Dog>();
    });
    IMapper mapper = config.CreateMapper();
    return mapper.Map<Person, Dog>(prs);
}

那么您可以轻松地:

Person ps = new Person {Name = "John", Number = 25};
Dog dog = UsingAMR(ps);

别忘了先按照参考资料中所述从包管理器控制台先安装AutoMapper :

Just don't forget to install AutoMapper first from the package manager console as mentioned in the reference:

1. 从工具菜单中单击 NuGet软件包管理器 ==> 软件包管理器控制台

2. 然后键入以下命令:

1. From Tools menu click on NuGet Package Manager ==> Package Manager Console

2. Then type the following command:

PM> Install-Package AutoMapper

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