Merge two objects using AutoMapper

Question

I'd like to merge two objects using AutoMapper (see test below). I've tried a bunch of things but it always copies both properties from the target or the source.

How can I pass the Test below?

public class Person { public string FirstName { get; set; } public string LastName { get; set; } } [Test] public void Merge_people() { var source = new Person() { LastName = "Smith" }; var target = new Person() { FirstName = "John" }; Mapper.CreateMap<Person, Person>(); Mapper.Map(source, target); Assert.That(target.FirstName == "John"); Assert.That(target.LastName == "Smith"); }

Marta · Accepted Answer · 2017-10-04 17:00:48Z

Using properly defined condition you can manage what you need:

 Mapper.CreateMap<Person, Person>() .ForAllMembers(o => o.Condition((source, destination, member) => member != null));

It will map only members that are different than null. I am using AutoMapper 6.1.1, but I believe it should work for older versions as well.

Community · Accepted Answer · 2017-05-23 12:29:51Z

1

I believe Automapper doesn't yet have that kind of functionality. See link here

edited May 23, 2017 at 12:29

CommunityBot

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answered Aug 6, 2015 at 7:07

jtabuloc

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