c# - 如何将 Automapper 与 Autofac 一起使用

Question

我已升级到最新版本的 AutoMapper (9.0)，并将静态配置更改为:

public static IMapper RegisterAutoMapper()
{
    var config = new MapperConfiguration(cfg =>
    {
        cfg.CreateMap<MyModel MyDto>;
        //etc...
   });
  
   var mapper = config.CreateMapper();
   return mapper;
}

使用以前的静态 API 我曾经在 Global.asax 中执行以下操作:

protected void Application_Start()
{
    GlobalConfiguration.Configure(WebApiConfig.Register);
    AutoMapping.Map();
}

WebApiConfig.Register注册路线和Autofac如何使用 Autofac 注册 AutoMapper，因为目前我在这些行上遇到编译器错误:

var myDto = Mapper.Map<MyModel>(model);

和编译器错误:

An object reference is required for the non-static field, method, or property 'Mapper.Map(object)'

Answer 1

这是我之前做的一个:

public class YourAutofacModule : Module
{
    protected override void Load(ContainerBuilder builder)
    {
        //Also register any custom type converter/value resolvers
        builder.RegisterType<CustomValueResolver>().AsSelf();
        builder.RegisterType<CustomTypeConverter>().AsSelf();

        builder.Register(context => new MapperConfiguration(cfg =>
        {
            cfg.CreateMap<MyModel MyDto>;
            //etc...
        })).AsSelf().SingleInstance();

        builder.Register(c =>
        {
            //This resolves a new context that can be used later.
            var context = c.Resolve<IComponentContext>();
            var config = context.Resolve<MapperConfiguration>();
            return config.CreateMapper(context.Resolve);
        })
        .As<IMapper>()
        .InstancePerLifetimeScope();
    }
}

在 global.asax.cs

public class MvcApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        var builder = new ContainerBuilder();

        builder.RegisterModule<MyAutofacModule>();
        // Register anything else needed

        var container = builder.Build();

        // MVC resolver
        DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

        // API Resolver
        GlobalConfiguration.Configuration.DependencyResolver = new AutofacWebApiDependencyResolver(container);
    }
}

然后你需要做的就是注入(inject)IMapper