[英]Autofac 4 with .NetCore API controller not loading
我有一个实例,当我使用Autofac
时,永不实例化控制器。 我认为我在配置上做错了什么,但我无法弄清楚。 我的解决方案中有2个项目。 1)API 2)核心所有模型,存储库和服务都位于核心中。 API中仅包含控制器。
如果我导航到默认或值控制器,则它们可以正常工作。 如果我从MemberController
删除构造函数,它将可以使用,但是在服务上会得到NULL
引用。 如果我重新添加构造函数, MemberController
永远不会加载(构造函数和get方法中的断点)不会受到攻击。
该服务需要有关实例化的数据模型。 在下面的实例中, MemberController
将MemberService<MemberDM>
用作IService<IDataModel>
。 我相信我已经在AutofacModule
注册了所有内容,但似乎没有用,因为从没有在MemberController
使用构造函数。
任何想法/帮助将不胜感激。
启动文件
public class Startup
{
public Startup(IHostingEnvironment env)
{
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
.AddEnvironmentVariables();
Configuration = builder.Build();
}
public IContainer ApplicationContainer { get; private set; }
public IConfigurationRoot Configuration { get; private set; }
// This method gets called by the runtime. Use this method to add services to the container.
public IServiceProvider ConfigureServices(IServiceCollection services)
{
// Add service and create Policy with options
services.AddCors(o => o.AddPolicy("CorsPolicy", p =>
{
p.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader()
.AllowCredentials();
}));
// Add framework services.
services.AddMvc();
var builder = new ContainerBuilder();
var connectionString = Configuration.GetValue<string>("DBConnection:ConnectionString");
builder.RegisterModule(new AutofacModule(connectionString));
builder.Populate(services);
ApplicationContainer = builder.Build();
return new AutofacServiceProvider(ApplicationContainer);
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IApplicationLifetime appLifetime)
{
loggerFactory.AddConsole(Configuration.GetSection("Logging"));
loggerFactory.AddDebug();
app.UseCors("CorsPolicy");
app.UseMvc();
appLifetime.ApplicationStopped.Register(() => this.ApplicationContainer.Dispose());
}
}
AutofacModule
public class AutofacModule :Autofac.Module
{
private string _connectionString;
public AutofacModule(string connectionString)
{
_connectionString = connectionString;
}
protected override void Load(ContainerBuilder builder)
{
// Register Connection class and expose IConnection
// by passing in the Database connection information
builder.RegisterType<Connection>() // concrete type
.As<IConnection>() // abstraction
.WithParameter("connectionString", _connectionString)
.InstancePerLifetimeScope();
// Register Repository class and expose IRepository
builder.RegisterType<Repository>() // concrete type
.As<IRepository>() // abstraction
.InstancePerLifetimeScope();
// Register DataModel as IDataModel
builder.RegisterAssemblyTypes(typeof(IServiceAssembly).GetTypeInfo().Assembly)
.Where(t => t.Name.EndsWith("DM"))
//.AsImplementedInterfaces();
.As<IDataModel>();
// Register Service Class as IService
builder.RegisterAssemblyTypes(typeof(IServiceAssembly).GetTypeInfo().Assembly)
.Where(t => t.Name.EndsWith("Service"))
.Except<IService<IDataModel>>()
//.AsImplementedInterfaces();
.As<IService<IDataModel>>();
}
}
IServiceAssembly
public interface IServiceAssembly
{
}
成员控制器
[Route("api/[controller]")]
public class MemberController : Controller
{
private readonly IService<MemberDM> _memberService;
public MemberController(IService<MemberDM> service)
{
_memberService = service;
}
// GET: api/values
[HttpGet]
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}
// GET api/values/5
[HttpGet("{id}")]
public async Task<IActionResult> Get(int id)
{
var result = await _memberService.Get(id);
return View(result);
}}
假设如下:
IService<T>
和IDataModel
实现IServiceAssembly
。 然后,在您的API项目中只有一个DI注册声明就足够了。
// Register DataModel as IDataModel
// Register Service Class as IService
builder.RegisterAssemblyTypes(typeof(IServiceAssembly).GetTypeInfo().Assembly)
.Where(t => t.Name.EndsWith("DM") || t.Name.EndsWith("Service"))
.AsImplementedInterfaces();
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