在ASP.NET核心3.1Web API中配置Autofac DI容器，并从控制器配置使用者服务
在ASP.NET核心3.1Web API中配置Autofac DI容器，并从控制器配置使用者服务
提问于 2020-07-21 16:05:39
我需要在ASP.NET core3.1Web API应用程序中配置Autofac DI容器，并从Web API控制器中的容器调用注册类。我安装了Autofac.Extensions.DependencyInjection (6.0.0)并尝试在我的Startup.cs类中注册容器，但我无法使用服务。另外，是否需要在ConfigureServices(IServiceCollection服务)类中配置容器？调试器在命中点builder.RegisterModule(新的IoCConfigurator() )后不命中IoCConfigurator()类；
Program.cs
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.UseServiceProviderFactory(new AutofacServiceProviderFactory())
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup();
});
}Startup.cs
public class Startup
{
public IConfiguration Configuration { get; }
public ContainerBuilder containerBuilder { get; }
public Startup(IConfiguration configuration)
{
Configuration = configuration;
containerBuilder = new ContainerBuilder();
}
public void ConfigureServices(IServiceCollection services)
{
ServicesConfigurator.Configure(services, Configuration);
ConfigureIoC(services, containerBuilder);
}
public void ConfigureIoC(IServiceCollection services, ContainerBuilder builder)
{
builder.RegisterModule(new IoCConfigurator());
}IoCConfigurator.cs
public class IoCConfigurator: Module
{
protected override void Load(ContainerBuilder builder)
{
builder.RegisterType().As();
builder.RegisterType().AsSelf();
}
}INotification接口和类
public interface INotificationService
{
void notifyUsernameChanged(Users users);
}
public class NotifyService : INotificationService
{
public void notifyUsernameChanged(Users users)
{
string changedUsername = users.Username;
Console.WriteLine("Username has changed to ... ");
Console.WriteLine(changedUsername);
}
}用户服务类
public class Users
{
public string Username { get; set; }
public Users(string username)
{
this.Username = username;
}
}
public class UsersService
{
private INotificationService _notificationService;
public UsersService(INotificationService notificationService)
{
this._notificationService = notificationService;
}
public void ChangeUsername(Users users, string newUsername)
{
users.Username = newUsername;
_notificationService.notifyUsernameChanged(users);
}
}要在其中对UserService类进行类并从DI容器获取引用的API控制器
[Authorize]
[Route("txn/v1/[controller]/[action]")]
[ApiController]
public class DashboardController : ControllerBase
{
[HttpPost("{name}")]
public ActionResult GetMessage(string name)
{
// call container here...
var result = new HelloMessage()
{
GivenName = name,
ReturnMessage = "Dashboard@ Hello, Welcome to Texanite Digital"
};
return result;
}回答 2
Stack Overflow用户
回答已采纳
发布于 2020-07-24 07:28:49
下面是我如何设置它的。在命令行中：
md autof
cd autof
dotnet new webapi
dotnet add package Autofac.Extensions.DependencyInjection然后使用VS或VSCode进行编辑。Program.cs -正如您所拥有的：
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.UseServiceProviderFactory(new AutofacServiceProviderFactory())
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup();
});接下来，在Startup.cs中，忘记ConfigureIoC，只需注册您想要/需要的服务：
public void ConfigureContainer(ContainerBuilder builder)
{
// Register your own things directly with Autofac, like:
//builder.RegisterModule();
builder.RegisterType().As();
}然后在DashboardController.cs中，您需要从构造函数“注入”所需的服务：
public class HelloMessage {
public string GivenName { get; set; }
public string ReturnMessage { get; set; }
}
//[Authorize] Easier without Auth - don't need
[Route("[controller]")]
[ApiController]
public class DashboardController : ControllerBase
{
private readonly INotificationService _notifyService;
public DashboardController(INotificationService notifyService)
{
_notifyService = notifyService;
}
//[HttpPost("{name}")] - easier to test Get
[HttpGet("{name}")]
public ActionResult GetMessage(string name)
{
// call container here...
_notifyService.notifyUsernameChanged(new Users(name));
var result = new HelloMessage()
{
GivenName = name,
ReturnMessage = $"Dashboard {name}, Welcome to Texanite Digital"
};
return result;
}
}我的结果：
使用控制台输出：
你的UserService有点“出了圈”，但你可以为它添加一个接口，注册到容器，并将它添加到控制器的注入服务中。
我可以把整件东西都拉上拉链，只是不知道该把它放在哪里还是送去……
Stack Overflow用户
发布于 2021-02-24 19:55:18
像这样修改你的代码，这就是我所想的
Program.cs
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.UseServiceProviderFactory(new AutofacServiceProviderFactory())
.ConfigureContainer(builder =>
{
builder.RegisterModule(new IoCConfigurator());
})
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup();
});
}Startup.cs
public class Startup
{
public IConfiguration Configuration { get; }
public ContainerBuilder containerBuilder { get; }
public Startup(IConfiguration configuration)
{
Configuration = configuration;
containerBuilder = new ContainerBuilder();
}
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/63010101
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