我正在使用.NET core 2.2构建全新的Web API。在我的 Startup.cs 中,在configure方法中设置了 ILoggerFactory 。当我做这样的事情并添加以下代码时
I am building brand new Web APIs with .NET core 2.2. In my Startup.cs I have set ILoggerFactory in configure method. When I do such a thing and add following code
loggerFactory.AddConsole(); loggerFactory.AddDebug();我得到的信息是此方法已过时,它将在以后的版本中删除,我应该使用 ILoggingBuilder 。没问题,我已经用这种新的日志记录方法替换了,一旦启动Web API,我就会报错
I get information saying that this method is obsolete and it will be removed in future versions, instead I should use ILoggingBuilder.No problem, I have replaced with this new logging method and as soon as I start Web APIs I get error
InvalidOperationException:没有注册类型为'Microsoft.Extensions.Logging.ILoggingBuilder'的服务。
InvalidOperationException: No service for type 'Microsoft.Extensions.Logging.ILoggingBuilder' has been registered.
,我的输出窗口显示此
无法解析参数'Microsoft.Extensions.Logging.ILoggingBuilder'类型的服务
Could not resolve a service of type 'Microsoft.Extensions.Logging.ILoggingBuilder' for the parameter 'loggingBuilder' of method.
.NET核心是我的新手,但是我在这里缺少什么吗?使用ILoggerFactury,我不必注册任何服务,日志记录就可以正常工作。 此处是Microsoft的文档并不是很有帮助。
I am new to .NET core, but am I missing something here? With ILoggerFactury, I did not have to register any services and logging would work just fine. Microsoft's documentation here is not really helpful.
Startup.cs看起来像这样:
Startup.cs looks like this:
public class Startup { // This method gets called by the runtime. Use this method to add services to the container. // For more information on how to configure your application, visit go.microsoft/fwlink/?LinkID=398940 public void ConfigureServices(IServiceCollection services) { services.AddMvc(); } // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggingBuilder loggingBuilder) { loggingBuilder.AddConsole(); loggingBuilder.AddDebug(); if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } else { app.UseExceptionHandler(); } app.UseMvc(); //app.Run(async (context) => //{ // await context.Response.WriteAsync("Hello World!"); //}); } }Program.cs看起来像这样:
Program.cs looks like this:
public class Program { public static void Main(string[] args) { CreateWebHostBuilder(args).Build().Run(); } public static IWebHostBuilder CreateWebHostBuilder(string[] args) => WebHost.CreateDefaultBuilder(args) .UseStartup<Startup>(); }推荐答案
它不起作用,因为您不要在依赖项注入容器中注册日志记录组件。有两种方法可以执行此操作:
It's not working because you're not registering the logging components with your dependency injection container. There are two ways you can do this:
可以将其配置为 CreateWebHostBuilder 的一部分:
Either configure it as part of the CreateWebHostBuilder:
public static IWebHostBuilder CreateWebHostBuilder(string[] args) => WebHost.CreateDefaultBuilder(args) .ConfigureLogging((hostingContext, logging) => { logging.AddConsole(); logging.AddDebug(); }) .UseStartup<Startup>();或者,也可以在 ConfigureServices :
services.AddLogging(logging => { logging.AddConsole(); logging.AddDebug(); });更多推荐
没有注册类型'Microsoft.Extensions.Logging.ILoggingBuilder'的服务
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