自动映射器空参考

Question

我有一个自动映射器抛出一个空引用异常的问题。

Mapper.CreateMap<People, PeopleDto>() 
     .ForMember(d => d.Country, opt => opt.MapFrom(o => o.Address.Country)) 

问题是，当地址为空，并试图获取地图Address.Country

Answer 1

Mapper.CreateMap() .ForMember(d => d.Country, opt => opt.MapFrom(o => (o.Address != null) ? o.Address.Country : "ADDRESS NOT SPECIFIED"))