没有注册类型'Microsoft.Extensions.Logging.ILogger'的服务

本文介绍了没有注册类型'Microsoft.Extensions.Logging.ILogger'的服务的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

创建了一个空白的ASP.NET Core 2.0应用程序.在Startup.cs中，要记录传入的请求.所以在配置方法中，我使用的是Microsoft.Extensions.Logging.ILogger

Created a blank ASP.NET Core 2.0 application. In Startup.cs, would like to log incoming requests. So in configure method, I am using Microsoft.Extensions.Logging.ILogger

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILogger logger) { app.Use(next => { return async context => { logger.LogInformation("Incoming request"); await next(context); logger.LogInformation("Outgoing response"); }; });

但是，当我构建项目时，它会抱怨

However, when I build the project, its complaining

An error occurred while starting the application. InvalidOperationException: No service for type 'Microsoft.Extensions.Logging.ILogger' has been registered.

为什么以及如何注册此服务?如果这是我的界面，那么这样做仍然很有意义

Why and how should I register this service? Had it been my interface, it would have still made sense to do

services.AddScope

在ConfigureServices中

in ConfigureServices

推荐答案

ILogger始终是一种类型，请尝试像这样更改它:

ILogger is always of a type, try change it like this:

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILogger<Startup> logger) { app.Use(next => { return async context => { logger.LogInformation("Incoming request"); await next(context); logger.LogInformation("Outgoing response"); }; });