自動映射器空參考

Question

我有一個自動映射器拋出一個空引用異常的問題。

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

問題是，當地址爲空，並試圖獲取地圖Address.Country

Answer 1

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