Question

It’s the first time that I use EmitMapper.
I have a list of object ex: Customer and I would like to map this list in a ienumerable of CustomerDTO how can I do that?
Tnx

Answer 1

It’s straightforward if you have a list and want to convert it to list of DTOs:

 var mapper = ObjectMapperManager.DefaultInstance.GetMapper<Customer, CustomerDTO>();

 IEnumerable<CustomerDTO> dtos = listOfCustomer.Select(mapper.map);

The preblem is when the list is in another object, for example User and UserDTO:

 class User { 
    public List<Customer> Customers { get; set; }
 }

 class UserDTO {
    public IEnumerable<CustomerDTO> Customers { get; set; }
 }

It seems that EmitMapper does not support conversion from List to Enumerable. A way to support it would be:

      var customerMapper = ObjectMapperManager
            .DefaultInstance.GetMapper<Customer, CustomerDTO>();
      var mapper = ObjectMapperManager.DefaultInstance
            .GetMapper<User, UserDTO>(
               new DefaultMapConfig()
                 .ConvertUsing<List<Customer>, IEnumerable<CustomerDTO>>(
                     a => a.Select(customerMapper.Map))
        );