Conditional projection using AutoMapper

Question

Say I have a \'Comment\' property on a \'Message\' class. I also have 2 class properties which have a \'Body\' property. If the class has either of the class properties se

Answer 1

Use a ValueResolver:

.ForMember(dto => dto.Comment, opt => opt.ResolveUsing<CommentResolver>().FromMember(src => src))

And then the actual implementation:

public class CommentResolver: ValueResolver<Message, string>
{
    protected override string ResolveCore(Message msg)
    {
        //logic goes here
        if (msg.InboundMessage != null)
         return msg.InboundMessage.Body; 
        else if (msg.OutboundMessage != null)
         return msg.OutboundMessage.Body; 
       else
         return msg.Comment;

    }
}