C# 仅当属性上的多个porperties不为null时，才自动映射它们

我必须从多个属性返回CallerAddress属性，就像string.Concat一样，除非它们不为null。到目前为止，我已经试过了，但不起作用。映射后，我的CallerAddress等于“Str.SomeStreetName”。我在数据库里查过了，其他列上有值。那么，我怎样才能让它发挥作用呢

 Mapper.CreateMap<ClientRecordingsDao,ClientRecording>()
    .ForMember(x => x.CallerAddress,
                        b =>
                            b.MapFrom(
                                x => x.CallerStreet != String.Empty
                                    ? "Str." + x.CallerStreet 
                                    : String.Empty +
                                      x.CallerStreetNumber != String.Empty
                                        ? " Nr."
                                        : String.Empty + x.CallerStreetNumber +
                                          x.CallerBuilding != String.Empty
                                            ? " Bl."
                                            : String.Empty + x.CallerBuilding +
                                              x.CallerApartment != String.Empty
                                                ? " Ap."
                                                : String.Empty + x.CallerApartment))

Mapper.CreateMap（）
.ForMember（x=>x.calledAddress，
b=>
b、 映射自(
x=>x.CallerStreet！=String.Empty
？“Str.”+x.CallerStreet
：String.Empty+
x、 CallerStreetNumber！=字符串。空
？“编号”
：String.Empty+x.CallerStreetNumber+
x、 CallerBuilding！=字符串。空
“Bl”
：String.Empty+x.CallerBuilding+
x、 CallerPartment！=字符串。空
“美联社。”
：String.Empty+x.CallerApartment）

它将

+

运算符应用于错误的位置。在

（）

中包装每个比较：

Mapper.CreateMap（）
.ForMember（x=>x.calledAddress，b=>b.MapFrom(
x=>（x.CallerStreet！=String.Empty？“Str.”+x.CallerStreet:String.Empty）+
（x.CallerStreetNumber！=String.Empty？“编号”+x.CallerStreetNumber:String.Empty）+
（x.CallerBuilding！=String.Empty？“Bl.”+x.CallerBuilding:String.Empty）+
（x.CallerApartment！=String.Empty？“Ap.”+x.CallerApartment:String.Empty））；

您的代码映射到此：

 Mapper.CreateMap<ClientRecordingsDao,ClientRecording>()
     .ForMember(x => x.CallerAddress, b => b.MapFrom(
         x => x.CallerStreet != String.Empty ? "Str." + x.CallerStreet :
         (String.Empty + x.CallerStreetNumber != String.Empty ? " Nr." + x.CallerStreetNumber :
         (String.Empty + x.CallerBuilding != String.Empty ? " Bl." + x.CallerBuilding : 
         (String.Empty + x.CallerApartment != String.Empty ? " Ap." +  x.CallerApartment : String.Empty)))));

Mapper.CreateMap（）
.ForMember（x=>x.calledAddress，b=>b.MapFrom(
x=>x.CallerStreet！=String.Empty？“Str.”+x.CallerStreet:
（String.Empty+x.CallerStreetNumber！=String.Empty？“编号”+x.CallerStreetNumber:
（String.Empty+x.CallerBuilding！=String.Empty？“Bl.”+x.CallerBuilding:
（String.Empty+x.CallerApartment！=String.Empty？“Ap.+x.CallerApartment:String.Empty(()())）；

 Mapper.CreateMap<ClientRecordingsDao,ClientRecording>()
     .ForMember(x => x.CallerAddress, b => b.MapFrom(
         x => x.CallerStreet != String.Empty ? "Str." + x.CallerStreet :
         (String.Empty + x.CallerStreetNumber != String.Empty ? " Nr." + x.CallerStreetNumber :
         (String.Empty + x.CallerBuilding != String.Empty ? " Bl." + x.CallerBuilding : 
         (String.Empty + x.CallerApartment != String.Empty ? " Ap." +  x.CallerApartment : String.Empty)))));