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

by

You will need these three mapings with one custom converter:

Mapper.CreateMap<Event, EventDTO>(); // maps message and event id
Mapper.CreateMap<EventLog, EventDTO>(); // maps system id and user id
Mapper.CreateMap<EventLog, IEnumerable<EventDTO>>()
      .ConvertUsing<EventLogConverter>(); // 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<EventLog, IEnumerable<EventDTO>>
{
    public IEnumerable<EventDTO> Convert(ResolutionContext context)
    {
        EventLog log = (EventLog)context.SourceValue;
        foreach (var dto in log.Events.Select(e => Mapper.Map<EventDTO>(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<Event>.CreateListOfSize(5).Build().ToList()
};

var events = Mapper.Map<IEnumerable<EventDTO>>(log);

More Related Contents:

  1. Ignore mapping one property with Automapper
  2. How to set up Automapper in ASP.NET Core
  3. Automapper: Update property values without creating a new object
  4. AutoMapper convert from multiple sources
  5. How to ignore null values for all source members during mapping in Automapper 6?
  6. AutoMapper vs ValueInjecter [closed]
  7. Copy object to object (with Automapper ?)
  8. Simple Automapper Example
  9. Dictionary map to an object using Automapper
  10. How to specify mapping rule when names of properties differ
  11. NuGet Package Manager: ‘AutoMapper’ already has a dependency defined for ‘Microsoft.CSharp’
  12. Automapper: Ignore on condition of
  13. Using Profiles in Automapper to map the same types with different logic
  14. Skip null values with custom resolver
  15. Pass Objects to AutoMapper Mapping
  16. Allow mapping of dynamic types using AutoMapper or similar?
  17. AutoMapper Migrating from static API
  18. Factory method with DI and IoC
  19. How to stop C# console applications from closing automatically? [duplicate]
  20. Attach a file from MemoryStream to a MailMessage in C#
  21. How do I generate a random integer in C#?
  22. How can I cast int to enum in C#?
  23. @Html.Action in Asp.Net Core
  24. Add two Lists of different length in C#
  25. Proper validation with MVVM
  26. How can I get Visual Studio 2008 Windows Forms designer to render a Form that implements an abstract base class?
  27. Is this thread.abort() normal and safe?
  28. How to print using XDocument
  29. Cyrillic encoding in C#
  30. How to name C# source files for generic classes

Leave a Comment