Automapper How to set another property if source is null

Question

Hello,

I wonder if there is a way to set Pin to Serial if Pin is null.

CreateMap<CouponDto, Coupon>()  
                .ForMember(dest => dest.Pin, src => src.NullSubstitute("-"))  
                .ForMember(dest => dest.Serial, src => src.NullSubstitute("-"));  

Answer 1

you can use IValueResolver to implement custom mapping

public class CustomPropertyMapping  
        : IValueResolver<Source, Destination, int>  
    {  
        public decimal Resolve(Source source,   
            DestinationDto destination, int value,   
            ResolutionContext context)  
        {  
             if (condition met)  
                return property1;  
            else   
                return property2  
        }  
    }  

and in configuration

CreateMap>Source, DestinationDto>()  
    .ForMember(dest => dest.property,   
        source => source.MapFrom<CustomPropertyMapping>())  

for more details on see custom property mapping using AutoMapper