使用AutoMapper映射静态类

Question

Is there a way to map static classes with AutoMapper?

Scenario is like this. There is a static class called UserIdentity and it contains properties. I want to map UserIdentity class values to my none static class called UserDTO .

When I tried

AutoMapper.Mapper.CreateMap<UserIdentity, UserDTO>();

There is an error saying,

static type cannot be used as type arguments

Now can anyone explain me about this scenario and is it achievable or not. And is there a way to map static classes without using Automapper. Otherwise I have to do them manually.

Answer 1

The only way to do this would be to use a dummy class to perform a no-op mapping. Then you could use a custom type converter, or mapping function or simply do something like this:

Mapper.CreateMap<Dummy, Dest>()
  .AfterMap((src, dest) => 
     { 
         dest.Name = UserIdentity.Name;
         dest.Id = UserIdentity.Id;
         //.... etc..
     });

Answer 2

Unfortunately you cant use automapper on static classes

Additionally there are a very limited set of situations in which you can refer to static class types, which will also make other approaches difficult

Static classes prevent inappropriate use, so in almost all situations, you can't use them in situations where you'd normally want an instance of the type... and that includes type arguments.

The only way i can see to achieve your desired results is to create a field by field mapping function your self

All though you can force automapper to use a dummy class, you are still mapping field by field anyway, my vote is to reduce complexity and just use something like the following

  public static SomeDTO CreateDTO()
  {
     return new SomeDTO
        {
            dest.Name = UserIdentity.Name;
            dest.Id = UserIdentity.Id;
            ect..
        }
  }