在新版本的AutoMapper中，使用静态方法Mapper.Map()已弃用。因此，您可以将MapperConfiguration作为静态属性添加到MvcApplication (Global.asax.cs)，并使用它来创建Mapper的实例。

App_Start

public class MapperConfig
{
    public static MapperConfiguration MapperConfiguration()
    {
        return new MapperConfiguration(_ =>
        {
            _.AddProfile(new FileProfile());
            _.AddProfile(new ChartProfile());
        });
    }
}

Global.asax.cs

public class MvcApplication : System.Web.HttpApplication
{
    internal static MapperConfiguration MapperConfiguration { get; private set; }

    protected void Application_Start()
    {
        MapperConfiguration = MapperConfig.MapperConfiguration();
        ...
    }
}

BaseController.cs

    public class BaseController : Controller
    {
        //
        // GET: /Base/
        private IMapper _mapper = null;
        protected IMapper Mapper
        {
            get
            {
                if (_mapper == null) _mapper = MvcApplication.MapperConfiguration.CreateMapper();
                return _mapper;
            }
        }
    }

https://github.com/AutoMapper/AutoMapper/wiki/Migrating-from-static-API

对于(丢失)使用的人:

WebAPI 2 SimpleInjector 3.1 AutoMapper 4.2.1(带配置文件)

以下是我如何以“新方式”集成AutoMapper。同时, 非常感谢这个回答(和问题)

1 -在WebAPI项目中创建一个名为“ProfileMappers”的文件夹。在这个文件夹中，我放置了所有创建映射的配置文件类:

public class EntityToViewModelProfile : Profile
{
    protected override void Configure()
    {
        CreateMap<User, UserViewModel>();
    }

    public override string ProfileName
    {
        get
        {
            return this.GetType().Name;
        }
    }
}

2 -在我的App_Start中，我有一个SimpleInjectorApiInitializer来配置我的SimpleInjector容器:

public static Container Initialize(HttpConfiguration httpConfig)
{
    var container = new Container();

    container.Options.DefaultScopedLifestyle = new WebApiRequestLifestyle();

    //Register Installers
    Register(container);

    container.RegisterWebApiControllers(GlobalConfiguration.Configuration);

    //Verify container
    container.Verify();

    //Set SimpleInjector as the Dependency Resolver for the API
    GlobalConfiguration.Configuration.DependencyResolver =
       new SimpleInjectorWebApiDependencyResolver(container);

    httpConfig.DependencyResolver = new SimpleInjectorWebApiDependencyResolver(container);

    return container;
}

private static void Register(Container container)
{
     container.Register<ISingleton, Singleton>(Lifestyle.Singleton);

    //Get all my Profiles from the assembly (in my case was the webapi)
    var profiles =  from t in typeof(SimpleInjectorApiInitializer).Assembly.GetTypes()
                    where typeof(Profile).IsAssignableFrom(t)
                    select (Profile)Activator.CreateInstance(t);

    //add all profiles found to the MapperConfiguration
    var config = new MapperConfiguration(cfg =>
    {
        foreach (var profile in profiles)
        {
            cfg.AddProfile(profile);
        }
    });

    //Register IMapper instance in the container.
    container.Register<IMapper>(() => config.CreateMapper(container.GetInstance));

    //If you need the config for LinqProjections, inject also the config
    //container.RegisterSingleton<MapperConfiguration>(config);
}

3 - Startup.cs

//Just call the Initialize method on the SimpleInjector class above
var container = SimpleInjectorApiInitializer.Initialize(configuration);

4 -然后，在你的控制器中像往常一样注入一个IMapper接口:

private readonly IMapper mapper;

public AccountController( IMapper mapper)
{
    this.mapper = mapper;
}

//Using..
var userEntity = mapper.Map<UserViewModel, User>(entity);

在新版本的AutoMapper中，使用静态方法Mapper.Map()已弃用。因此，您可以将MapperConfiguration作为静态属性添加到MvcApplication (Global.asax.cs)，并使用它来创建Mapper的实例。

App_Start

public class MapperConfig
{
    public static MapperConfiguration MapperConfiguration()
    {
        return new MapperConfiguration(_ =>
        {
            _.AddProfile(new FileProfile());
            _.AddProfile(new ChartProfile());
        });
    }
}

Global.asax.cs

public class MvcApplication : System.Web.HttpApplication
{
    internal static MapperConfiguration MapperConfiguration { get; private set; }

    protected void Application_Start()
    {
        MapperConfiguration = MapperConfig.MapperConfiguration();
        ...
    }
}

BaseController.cs

    public class BaseController : Controller
    {
        //
        // GET: /Base/
        private IMapper _mapper = null;
        protected IMapper Mapper
        {
            get
            {
                if (_mapper == null) _mapper = MvcApplication.MapperConfiguration.CreateMapper();
                return _mapper;
            }
        }
    }

https://github.com/AutoMapper/AutoMapper/wiki/Migrating-from-static-API

将所有映射逻辑放在一个位置对我来说不是一个好的实践。因为映射类非常大，很难维护。

我建议把映射的东西和ViewModel类放在同一个cs文件中。您可以按照这个约定轻松地导航到您想要的映射定义。此外，在创建映射类时，您可以更快地引用ViewModel属性，因为它们在同一个文件中。

所以你的视图模型类看起来像这样:

public class UserViewModel
{
    public ObjectId Id { get; set; }

    public string Firstname { get; set; }

    public string Lastname { get; set; }

    public string Email { get; set; }

    public string Password { get; set; }
}

public class UserViewModelMapping : IBootStrapper // Whatever
{
    public void Start()
    {
        Mapper.CreateMap<User, UserViewModel>();
    }
}

你可以把它放在任何地方，只要你的web项目引用它所在的程序集。在你的情况下，我会把它放在服务层，因为它将被web层和服务层访问，之后如果你决定做一个控制台应用程序或你正在做一个单元测试项目，映射配置也将从这些项目中可用。

在你的全局中。Asax，然后你将调用方法，设置你的所有地图。见下文:

文件AutoMapperBootStrapper.cs

public static class AutoMapperBootStrapper
{
     public static void BootStrap()
     {  
         AutoMapper.CreateMap<Object1, Object2>();
         // So on...


     }
}

全球。Asax应用程序启动

就叫

AutoMapperBootStrapper.BootStrap();

现在有些人会反对这种方法违反了一些坚实的原则，他们有有效的理由。这是供阅读的。

在Bootstrapper中配置Automapper违反了开闭原则?

对于使用AutoMapper新版本(5.x)的vb.net程序员。

Global.asax.vb:

Public Class MvcApplication
    Inherits System.Web.HttpApplication

    Protected Sub Application_Start()
        AutoMapperConfiguration.Configure()
    End Sub
End Class

AutoMapperConfiguration:

Imports AutoMapper

Module AutoMapperConfiguration
    Public MapperConfiguration As IMapper
    Public Sub Configure()
        Dim config = New MapperConfiguration(
            Sub(cfg)
                cfg.AddProfile(New UserProfile())
                cfg.AddProfile(New PostProfile())
            End Sub)
        MapperConfiguration = config.CreateMapper()
    End Sub
End Module

配置文件:

Public Class UserProfile
    Inherits AutoMapper.Profile
    Protected Overrides Sub Configure()
        Me.CreateMap(Of User, UserViewModel)()
    End Sub
End Class

映射:

Dim ViewUser = MapperConfiguration.Map(Of UserViewModel)(User)