C# AutoMapper 简化

Question

有什么方法可以简化映射？我不想写 src.Accounts.First().UserInfo 多次访问。最好将它放在一个单独的变量中。怎么做？

CreateMap<Test, TestDto>()
    .ForMember(dst => dst.FirstName, opt => opt.MapFrom(src => src.Accounts.First().UserInfo.FirstName))
    .ForMember(dst => dst.LastName, opt => opt.MapFrom(src => src.Accounts.First().UserInfo.LastName))
    .ForMember(dst => dst.Email, opt => opt.MapFrom(src => src.Accounts.First().UserInfo.Email));

谢谢

Answer 1

您可以使用 IncludeMembers.

CreateMap<Test, TestDto>().IncludeMembers(src => src.Accounts.First().UserInfo);

https://docs.automapper.org/en/latest/Flattening.html#includemembers

Answer 2

你可以找Custom Type Converters.

public class TestDtoTypeResolver : ITypeConverter<Test, TestDto>
{
    public TestDto Convert(Test source, TestDto destination, ResolutionContext context)
    {
        var userInfo = source.Accounts.First().UserInfo;
        return new TestDto
        {
            FirstName = userInfo.FirstName, 
            LastName = userInfo.LastName, 
            Email = userInfo.Email
        };
    }
}

CreateMap<Test, TestDto>()
    .ConvertUsing<TestDtoTypeResolver>();

Sample .NET Fiddle

C# AutoMapper 简化

C# AutoMapper simplification

.net

c#

automapper