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c# - 如何使用 DI usinq autofac .net 框架注册 ILogger(Microsoft.Extensions.Logging)

问题描述

我在 .net 框架项目中使用 Microsoft.Extensions.Logging 的 ILogger。现在我想在容器中注册 ILogger 但我不能。所有答案都是关于 .net 核心的。我试试

var builder = new ContainerBuilder();

builder.RegisterApiControllers(Assembly.GetExecutingAssembly());

//first try
builder.RegisterGeneric(typeof(Logger<>)).As(typeof(ILogger<>));
IServiceCollection services = new ServiceCollection();

//second try
services.AddSingleton(typeof(ILogger<>), typeof(Logger<>));
IContainer container = builder.Build();

httpConfig.DependencyResolver = new AutofacWebApiDependencyResolver(container);

我的课也是

public class TestController : ApiController
{
    private readonly ILogger<TestController > _logger;
    private readonly IService _service;

    public TestController (IService service, ILogger<TestController > logger)
        {
            _service = service;
            _logger = logger;
        }
}

di 是正确的，因为其他服务已正确注入。当我在构造函数中包含记录器时，我收到消息尝试创建类型为“TestController”的控制器时发生错误。确保控制器有一个无参数的公共构造函数。

标签： c#.netdependency-injectionautofacilogger

解决方案

由于尝试与这些扩展集成，请考虑填充服务集合并在注册所有内容后填充构建器，

来自文档的示例

var builder = new ContainerBuilder();

builder.RegisterApiControllers(Assembly.GetExecutingAssembly());

IServiceCollection services = new ServiceCollection();

// The Microsoft.Extensions.Logging package provides this one-liner
// to add logging services.
services.AddLogging();

// Once you've registered everything in the ServiceCollection, call
// Populate to bring those registrations into Autofac. This is
// just like a foreach over the list of things in the collection
// to add them to Autofac.
builder.Populate(services);

IContainer container = builder.Build();

httpConfig.DependencyResolver = new AutofacWebApiDependencyResolver(container);

参考Autofac：.Net Core 集成

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