services.AddAutoMapper ();对我没用。(我用的是Asp。Net Core 2.0)

配置如下

   var config = new AutoMapper.MapperConfiguration(cfg =>
   {                 
       cfg.CreateMap<ClientCustomer, Models.Customer>();
   });

初始化映射器 IMapper mapper = config.CreateMapper();

并将mapper对象作为单例添加到服务中 services.AddSingleton(映射);

这样我就可以添加DI到控制器

  private IMapper autoMapper = null;

  public VerifyController(IMapper mapper)
  {              
   autoMapper = mapper;  
  }

我在我的动作方法中使用了如下

  ClientCustomer customerObj = autoMapper.Map<ClientCustomer>(customer);

services.AddAutoMapper ();对我没用。(我用的是Asp。Net Core 2.0)

配置如下

   var config = new AutoMapper.MapperConfiguration(cfg =>
   {                 
       cfg.CreateMap<ClientCustomer, Models.Customer>();
   });

初始化映射器 IMapper mapper = config.CreateMapper();

并将mapper对象作为单例添加到服务中 services.AddSingleton(映射);

这样我就可以添加DI到控制器

  private IMapper autoMapper = null;

  public VerifyController(IMapper mapper)
  {              
   autoMapper = mapper;  
  }

我在我的动作方法中使用了如下

  ClientCustomer customerObj = autoMapper.Map<ClientCustomer>(customer);

我想扩展@theutz的答案-即这一行:

// services.AddAutoMapper(typeof(Startup));  // <-- newer automapper version uses this signature.

AutoMapper.Extensions.Microsoft.DependencyInjection版本3.2.0中有一个错误(可能)。(我使用的是。net Core 2.0)

这个问题在这个GitHub问题中解决。如果你继承AutoMapper的Profile类存在于你的Startup类所在的程序集之外，如果你的AutoMapper注入是这样的，它们可能不会被注册:

services.AddAutoMapper();

除非您显式指定要搜索AutoMapper概要文件的程序集。

在你的初创公司中也可以这样做。ConfigureServices:

services.AddAutoMapper(<assembies> or <type_in_assemblies>);

其中"assemblies"和"type_in_assemblies"指向应用程序中指定Profile类的程序集。例句:

services.AddAutoMapper(typeof(ProfileInOtherAssembly), typeof(ProfileInYetAnotherAssembly));

我认为(我强调这个词)由于以下无参数重载的实现(来自GitHub的源代码):

public static IServiceCollection AddAutoMapper(this IServiceCollection services)
{
     return services.AddAutoMapper(null, AppDomain.CurrentDomain.GetAssemblies());
}

我们依赖于CLR已经包含AutoMapper配置文件的JITed程序集，这可能是真的，也可能不是真的，因为它们只在需要时被jit(更多细节在这个StackOverflow问题中)。

在。net 6中，你需要在Program.cs文件中添加以下内容:

builder.Services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());

让我们来看看如何将Auto mapper添加到。net Core应用程序中。

步骤:1 第一步是安装相应的NuGet包:

Install-Package AutoMapper.Extensions.Microsoft.DependencyInjection

一步:2

安装所需的包后，下一步是配置服务。让我们在Startup.cs类中执行:

public void ConfigureServices(IServiceCollection services)
{
    services.AddAutoMapper(typeof(Startup));
    services.AddControllersWithViews();
}

一步:3

让我们开始使用，我们有一个名为User的域对象:

public class User
{
    public int Id { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Email { get; set; }
    public string Address { get; set; }
}

在UI层，我们将有一个视图模型来显示用户信息:

public class UserViewModel
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Email { get; set; }
}

一步:4

组织映射配置的一个好方法是使用Profiles。我们需要创建从Profile类继承的类，并将配置放在构造函数中:

public UserProfile()
{
    CreateMap<User, UserViewModel>();
}

一步:5

现在，让我们定义一个Controller并使用我们刚刚添加的Auto-Mapping功能:

public class UserController : Controller
{
    private readonly IMapper _mapper;
    public UserController(IMapper mapper)
    {
        _mapper = mapper;
    }
    public IActionResult Index()
    {
        // Populate the user details from DB
        var user = GetUserDetails();
        UserViewModel userViewModel = _mapper.Map<UserViewModel>(user);
        return View(userViewModel);
    }
}

首先，我们将映射器对象注入到控制器中。然后，我们调用Map()方法，它将User对象映射到UserViewModel对象。此外，请注意我们用于本地数据存储的本地方法GetUserDetails。 您可以在我们的源代码中找到它的实现。

我想明白了!细节如下:

Add the main AutoMapper Package to your solution via NuGet. Add the AutoMapper Dependency Injection Package to your solution via NuGet. Create a new class for a mapping profile. (I made a class in the main solution directory called MappingProfile.cs and add the following code.) I'll use a User and UserDto object as an example. public class MappingProfile : Profile { public MappingProfile() { // Add as many of these lines as you need to map your objects CreateMap<User, UserDto>(); CreateMap<UserDto, User>(); } } Then add the AutoMapperConfiguration in the Startup.cs as shown below: public void ConfigureServices(IServiceCollection services) { // .... Ignore code before this // Auto Mapper Configurations var mapperConfig = new MapperConfiguration(mc => { mc.AddProfile(new MappingProfile()); }); IMapper mapper = mapperConfig.CreateMapper(); services.AddSingleton(mapper); services.AddMvc(); } To invoke the mapped object in code, do something like the following: public class UserController : Controller { // Create a field to store the mapper object private readonly IMapper _mapper; // Assign the object in the constructor for dependency injection public UserController(IMapper mapper) { _mapper = mapper; } public async Task<IActionResult> Edit(string id) { // Instantiate source object // (Get it from the database or whatever your code calls for) var user = await _context.Users .SingleOrDefaultAsync(u => u.Id == id); // Instantiate the mapped data transfer object // using the mapper you stored in the private field. // The type of the source object is the first type argument // and the type of the destination is the second. // Pass the source object you just instantiated above // as the argument to the _mapper.Map<>() method. var model = _mapper.Map<UserDto>(user); // .... Do whatever you want after that! } }