AutoMapper: Collection to Single string Property

Question

I have a scenario in which I have to do following mapping

public class Company : BaseEntity
{            
    public         


        

Answer 1

You can use the following mapping:

Mapper.CreateMap<Company, CompanyViewModel>()
    .ForMember(dest => dest.Services,
         m => m.MapFrom(src => string.Join(", ", src.CompanyServices
                                                    .Select (s => s.Service.Name))));

But note that you won't be able to use the mapping in an IQueryable for LINQ to Entities directly, because EF will throw an exception that it can't convert the string.Join part into SQL. You'll have to use AsEnumerable and then do the mapping, like:

Mapper.Map<T>(context.Entities.AsEnumerable(). ...)