Question

These are my domain and view classes:

public abstract class Entity : IEntity
{
    [Key]
    public virtual int Id { get; set; }
}

public class City:Entity
{
    public string Code { get; set; }
}

public class BaseViewModel:IBaseViewModel
{
    public int Id { get; set; }
}

public class CityModel:BaseViewModel
{
    public string Code { get; set; }
}

This is my mapping extension:

public static TModel ToModel<TModel>(this IEntity entity) 
    where TModel : IBaseViewModel
{
    return (TModel)Mapper.Map(entity, entity.GetType(), typeof(TModel));
}

This is how it’s used:

City city = GetCity();
CityModel model = city.ToModel<CityModel>();

but for generic lists it doesn’t work:

List<City> cities = GetCities();
List<CityModel> model =cities.ToModel<CityModel>() // doesn't work

Is it possible to write an extension method for a generic list?

Answer 1

You will need something like this

public static List<TModel> ToModel<TModel>(this IEnumerable<IEntity> entity) 
    where TModel : IBaseViewModel
{
    // magic
}