AutoMapper可以在所有字段上应用通用/全局格式化程序吗? [英] AutoMapper to apply common/global formatter on all fields?

问题描述

我正在使用AutoMapper 3.2.1

I am using AutoMapper 3.2.1

我只是有一个要求，即我的项目的使用者要我做一些简单的转换-将所有字符串字段都修剪为空白并将null转换为string.empty.

I just got a requirement where the consumers of my project want me to do some simple transformations -- have all string fields trimmed of whitespace and convert null to string.empty.

我该如何在AutoMapper中高效地做到这一点?

How would I do this in AutoMapper in an efficient manner?

例如

public class Person()
{
   public string First {get; set;}
   public string Middle {get; set; }
   public string Last {get; set; }
   public DateTime DateOfBirth {get; set; }
}

public class PersonDto()
{
   public string First {get; set;}
   public string Second {get; set; }
   public string Last {get; set; }
   public DateTime DateOfBirth {get; set; }
}

还有我的地图示例:

Mapper.CreateMap<Person, PersonDto>().
    .ForMember(dst => dst.Second, opt => opt.MapFrom(src => src.Middle));

Mapper.CreateMap<PersonDto, Person>().
    .ForMember(dst => dst.Last, opt => opt.MapFrom(src => src.Second));

我尝试通过google找到答案，发现有人在使用:

I tried google to find an answer, saw that some people were using:

Mapper.ForSourceType<string>().AddFormatter(MyCustomStringFormatter)

但是AddFormatter似乎已经过时了吗?

but it seems AddFormatter is obsolete?

推荐答案

如果您确实想将这些规则应用于 all 字符串，则可以通过 string 转换为 string :

If you truly want to apply these rules to all strings, you can set up a mapping from string to string:

Mapper.CreateMap<string, string>()
    .ConvertUsing(str => (str ?? "").Trim());

从一个 string 属性映射到另一个属性时，将遵循此规则.

This rule will be picked up when mapping from one string property to another.

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