I'm using AutoMapper, the point is that I do not want to map the null values, since I want to keep the value of the target entity members. I've done it this way but it does not work.
opts.Condition((source, dest, sourceMember, destMember)=> sourceMember !=null ));
Let's start from the base that what you map is the structure, the null is data, although if you can validate in the mapping if there is certain data take an action, but the property must be defined because it is part of the object
cfg.CreateMap<classOrigen,classDestino>()
.ForMember(dest => dest.Prop1, opt => opt.Condition(src => (src.Prop1 != null)));
in this case in both classes you have defined Prop1 but only apply according to the value imagine
public class classDestino{
public int Prop1 {get;set;}
}
public class classOrigen{
public int? Prop1 {get;set;}
}
As you will see, a class allows null but the destination does not, so that it does not fail, you add the condition