Ignore a property in AutoMapper?

Question

I'm using Automapper to copy one object properties to other and later will update in database using EF.

Question is how to tell Automapper copy every property but ignore a particular property (in this case it will be Id). I'm new to AutoMapper and just have done this code. I don't have other configurations or use of AutoMap in project.

Mapper.Map(lead, existingLead);

I have downloaded AutoMapper form here https://github.com/AutoMapper/AutoMapper

Answer 1

On your Mapper.CreateMap<Type1, Type2>() you can use either

.ForSourceMember(x => x.Id, opt => opt.Ignore())

or

.ForMember(x => x.Id, opt => opt.Ignore())

Answer 2

I use this extension method:

public static IMappingExpression<TSource, TDestination> IgnoreMember<TSource, TDestination>(
    this IMappingExpression<TSource, TDestination> map, Expression<Func<TDestination, object>> selector)
{
    map.ForMember(selector, config => config.Ignore());
    return map;
}

and I use it like this

Mapper.CreateMap<MyType1, MyType2>().IgnoreMember(m => m.PropertyName);

Hope that helps.