How inject service in AutoMapper profile class

Question

I need to use a service layer in the AutoMapper profile class in ASP.NET Core but when I inject service in the constructor it does not work. For ex

Answer 1

It's better to use custom IValueResolver for this purposes because it is fully supports IServiceCollection integration (using AutoMapper.Extensions.Microsoft.DependencyInjection).

You may need to implement a custom value resolver:

public class UserViewModelValueResolver: IValueResolver<...>
{
    public readonly IUserManager userManager;
    public UserViewModelValueResolver(IUserManager userManager)
    {
        this.userManager = userManager;
    }
    ...
}

And the registration in services may be reduced to:

public void ConfigureServices(IServiceCollection services)
{
    // ...
    services.AddSingleton();
}

Then you can get a mapper instance inside a controller by injecting IMapper via a constructor.

Based on: AutoMapper: Handling Profile Dependencies using Custom Value Resolvers - Tech Net