Automapper copy List to List

Question

I have these classes:

public class Person {
    public int Id{ get; set ;}
    public string FirstName{ get; set ;}
    public string LastName{ get; set ;}
}

public class PersonView {
    public int Id{ get; set ;}
    public string FirstName{ get; set ;}
    public string LastName{ get; set ;}
}

I defined this:

Mapper.CreateMap<Person, PersonView>();
Mapper.CreateMap<PersonView, Person>()
    .ForMember(person => person.Id, opt => opt.Ignore());

That's work for this:

PersonView personView = Mapper.Map<Person, PersonView>(new Person());

I'd like to make the same but for List<Person> to List<PersonView> but I don't find the right syntax.

Thanks

Plicate

Answer 1

Once you've created the map (which you've already done, you don't need to repeat for Lists), it's as easy as:

List<PersonView> personViews = 
    Mapper.Map<List<Person>, List<PersonView>>(people);

You can read more in the AutoMapper documentation for Lists and Arrays.

Danicadanice

What's interesting to note here, is that the source template can be the most generic type, like PersonView[] and the output can be of any other supported type such as IEnumerable, ICollection, IList, etc – Therefor

Answer 2

For AutoMapper 6< it would be:

In StartUp:

Mapper.Initialize(cfg => {
    cfg.CreateMap<Person, PersonView>();
    ...
});

Then use it like this:

List<PersonView> personViews = Mapper.Map<List<PersonView>>(people);

Exponential

Answer 3

You can also try like this:

var personViews = personsList.Select(x=>x.ToModel<PersonView>());

where

 public static T ToModel<T>(this Person entity)
 {
      Type typeParameterType = typeof(T);

      if(typeParameterType == typeof(PersonView))
      {
          Mapper.CreateMap<Person, PersonView>();
          return Mapper.Map<T>(entity);
      }

      return default(T);
 }

Bolding