Auto mapper Custom resolver source members to destination object list mapping issue

Question

The Scenario is as follows:

Source Object:

public class personSrc
{
    public string name {get; set;}
    public string phone {get; set;}
    public string HomeAddress {get; set;}
    public string OfficeAddress {get; set;}
}

Destination Object:

public class personDest
{
    public string name {get; set;}
    public string phone {get; set}
    public List<address> addresses {get; set;}
}

public class address
{
    public string location {get; set;}
    public addressType type {get; set;}
}
public enum addressType {Office, Home}

so in order to map the address members from source into destination i made this custom resolver:

public class CustomResolver : IValueResolver<personSrc, personDest, List<address>>
{
  public List<address> Resolve(personSrc source, personDest destination, List<address> destMember, ResolutionContext context)
  {
    List<address> result = new List<adress>();
    if(!String.IsNullOrEmpty(source.HomeAddress))
    {
       result.add(new Address{
         location = source.HomeAddress,
         type = addressType.Home
       });
    }
    if(!String.IsNullOrEmpty(source.OfficeAddress))
    {
       result.add(new Address{
         location = source.OfficeAddress,
         type = addressType.Office
       });
    }
    return result;
  }
}

the issue that i am facing is that i cannot seem to pass personSrc class when i am defining the profiler which i wrote like this :

CreateMap<personSrc, personDest>()
    .ForMember(dest => dest.name, opt => opt.MapFrom(src => src.name))
    .ForMember(dest => dest.phone, opt => opt.MapFrom(src => src.phone))
    .ForMember(dest => dest.addresses, opt => opt.MapFrom<customResolver>(src => src) // this line is not working
    .ForMember(dest => dest.addresses, opt => opt.MapFrom<customResolver>() // this line is also not working

most likely my profile is not properly implemented however i cannot seem to find an example of a proper implementation.

Sead Avdic Sead Avdic · Accepted Answer · 2020-06-25T09:45:13

Your profile is correct. I have tried your example and I have managed to get values maped to your destination class and your profile should look like this:

public class CustomProfiler : Profile
  {
    /// <summary>
    /// Initializes a new instance of the <see cref="CustomerProfile"/> class.
    /// </summary>
    public CustomProfiler()
    {
      CreateMap<personSrc, personDest>()
     .ForMember(dest => dest.name, opt => opt.MapFrom(src => src.name))
     .ForMember(dest => dest.phone, opt => opt.MapFrom(src => src.phone))
     .ForMember(dest => dest.addresses, opt => opt.MapFrom<CustomResolver>());
    }
  }

I have tried it with the example:

var personSrc = new personSrc { HomeAddress = "HomeAddress", OfficeAddress = "OfficeAddress", name = "name", phone = "phone" };
      var personDest = mapper.Map<personDest>(personSrc);

You were on the right track. Can you try it and let me know if that works for you?

Auto mapper Custom resolver source members to destination object list mapping issue

1 Answers