Possible to use AutoMapper to map one object to list of objects?

Question

These are my classes:

public class EventLog {
        public string SystemId { get; set; }
        public string UserId { get; set; }
        public List<         


        

Answer 1

You will need these three mapings with one custom converter:

Mapper.CreateMap(); // maps message and event id
Mapper.CreateMap(); // maps system id and user id
Mapper.CreateMap>()
      .ConvertUsing(); // creates collection of dto

Thus you configured mappings from Event to EventDTO and from EventLog to EventDTO you can use both of them in custom converter:

class EventLogConverter : ITypeConverter>
{
    public IEnumerable Convert(ResolutionContext context)
    {
        EventLog log = (EventLog)context.SourceValue;
        foreach (var dto in log.Events.Select(e => Mapper.Map(e)))
        {
            Mapper.Map(log, dto); // map system id and user id
            yield return dto;
        }
    }
}

Sample code with NBuilder:

var log = new EventLog {
    SystemId = "Skynet",
    UserId = "Lazy",
    Events = Builder.CreateListOfSize(5).Build().ToList()
};

var events = Mapper.Map>(log);