使用带有 Automapper 的自定义解析器映射列表

Question

我有 2 个对象需要相互映射。它们看起来像

public class Example1
{
     CustomType1 Prop { get; set; }
     List<CustomType1> List { get; set; } 
}

public class Example2
{
    Customtype2 Prop { get; set; }
    List<Customtype2> List { get; set; } 
}

public class CustomType1
{
    public string SomeString { get; set; }
}

public class Customtype2
{
    public string FirstPartOfSomeString { get; set; }

    public string SecondPartOfSomeString { get; set; }
}

我想制作一个将 CustomType1 映射到 CustomType2 的 CustomResolver，然后在列表中使用该解析器。例如，

Mapper.CreateMap<Example1, Example2>()
            .ForMember(d => d.Prop, opt => opt.ResolveUsing(myCustomResolver))
            .ForMember(d => d.List, opt => opt.ResolveUsing( /*use myCustomResolver on a list here*/));

我尝试过使用类似的东西：

Mapper.CreateMap<Example1, Example2>()
            .ForMember(d => d.Prop, opt => opt.ResolveUsing(myCustomResolver))
            .ForMember(d => d.List, opt => opt.MapFrom(s => s.List.Select(myCustomResolver.Resolve).ToList()));

但我似乎遗漏了什么。有没有办法用 AutoMapper 做到这一点？

Answer 1

您是否尝试过在自定义类型之间添加映射而不是使用解析器？ AutoMapper 足够智能，可以重复使用列表的映射...

Mapper.CreateMap<CustomType1, CustomType2>()
    .ForMember(x => FirstPartOfSomeString, opts => opts.MapFrom(x => x.SomeString.Substring(5)))
    .ForMember(x => SecondPartOfSomeString, opts => opts.MapFrom(x => x.SomeString.Substring(5, 5)));

Mapper.CreateMap<Example1, Example2>();