AutoMapper ForMember and MapFrom is not executed

Solution 1:

First solution: Remove from class ImageParams any constructor except default without parameters:

public class ImageParams : IImage
    {
        public ImageParams()
        {

        }
    //Other members.
    }

Second solution: Add DisableConstructorMapping():

var config = new MapperConfiguration(cfg => {
                    cfg.AddProfile(new MappingProfile());
                    cfg.DisableConstructorMapping();
                }
            );
var mapper = config.CreateMapper();

Third solution:

CreateMap<ImageParams, Image>()
                .ForMember(x => x.ImagePath, o => o.MapFrom(s => ImagePathFormatting(s.ImagePath)))
                .ReverseMap()
                .ForMember(x => x.ImagePath, o => o.MapFrom(s => ImagePathFormatting(s.ImagePath)))
                .ConstructUsing(x => new ImageParams());

Source 1 Source 2

Solution 2:

I'd strongly suggest you use AutoMapper Execution Plan Tool tool to see exactly what automapper is doing when it runs the mapping.

Confident that will solve your problem.