Automapper copy based on destination value

Question

I am trying to copy source value only if the destination value is null. I am using the following map

 Mapper.CreateMap<BM.AudioSetting, BM.AudioSetting>()
        .ForMember(dest => dest.MSOffsetInherited, opt =>
                                                       {
                                                           opt.Condition(src => src.DestinationValue == null);
                                                           opt.MapFrom(src => src.MSOffset);
                                                       });

In my condition I am checking to make sure the destination value is null before mapping. The problem is the copying is happening all the time regardless of the destination value.

Am I doing this wrong?

Thanks Isam

It looks correct. What version of Automapper are you using? Can you show the class definition of BM.AudioSetting along with the data that exists that isn't mapping correctly? — PatrickSteele, Oct 18 '12 at 13:05

score 0 · Answer 1 · edited May 23 '17 at 12:07

0

Your code should work fine. Probably you're expecting src.DestinationValue to be the destination object's property. If so, custom type converter should help you to achieve desired behavior.

This post should help you with creating custom type converter.

edited May 23 '17 at 12:07

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answered Oct 17 '12 at 19:37

k0stya

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score 0 · Answer 2 · edited May 23 '17 at 11:44

0

I notice your source and destination types are the same. Are you essentially trying to clone the object when the destination value is null? If so, then AutoMapper may not be the appropriate solution as per the comments on this question: Copy object to object (with Automapper ?)

edited May 23 '17 at 11:44

Community

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answered Nov 03 '12 at 02:13

Mightymuke

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Automapper copy based on destination value

2 Answers2