AutoMapping an Enum to an Entity Framework 5.0 complex type error

Question

So the error is this: Expression must resolve to top-level member and not any child object's properties.

Remuneration in the DTO is a Enum. ContractEntity uses a Remuneration that is a ComplexType.

The code throwing the error:

Mapper.CreateMap<ContractDTO, ContractEntity>() .ForMember(d => d.Remuneration.ContractType, s => s.MapFrom(z => z.ContractType)) .ForMember(d => d.Remuneration.Currency, s => s.MapFrom(z => z.Currency)) .ForMember(d => d.Remuneration.RateUnit, s => s.MapFrom(z => z.RateUnit));

Entity Framework complex type:

 [ComplexType] public class Remuneration { public decimal Amount { get; set; } public int Currency { get; set; } public int RateUnit { get; set; } public int ContractType { get; set; } }

Because I want the destination (ContractEntity) to use the integer values, I thought I could just cast the source enum to the destination integer like this:

.ForMember(d => d.Remuneration.ContractType, s => s.MapFrom(z => (int)z.ContractType))

.. obviously I cant, and was hoping that someone could clarify why this doesn't work..

Andrei · Accepted Answer · 2013-09-05 12:15:56Z

1

If you have problmes with complex type mapping, you can implement manual mapping based on AutoMapper:

Mapper.CreateMap<PatternDto, PatternModel>().ConvertUsing(pattern => { if(pattern == null) return new PatternModel(); return new PatternModel { EmailPattern = pattern.EmailPattern, SmsPattern = pattern.SmsPattern }; });

Good luck!

answered Sep 5, 2013 at 12:15

Andrei

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4 Comments

Greg Over a year ago

Hi Andrei - tried that but the problem is that ContactEntity has a ComplexType of Remuneration which has properties that I cant access using your example. In other words: PatternModel has a complextype of MessagePatterns which have properties of EmailPattern and SMSPatterns.

Andrei Over a year ago

And again it is possible somehow to solve your problem with ConvertUsing

Greg Over a year ago

Possibly, the question is how?

Greg Over a year ago

Tried this as well but it doesnt work: Mapper.CreateMap<ContractType, int>().ConvertUsing(pattern => (int)pattern); Mapper.CreateMap<Currency, int>().ConvertUsing(pattern => (int)pattern); Mapper.CreateMap<RateUnit, int>().ConvertUsing(pattern => (int)pattern);

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