从静态类记录 ASP.NET Core Web API [英] ASP.NET Core Web API Logging from a Static Class

问题描述

我在我的控制器上使用依赖注入来记录日志就好了，现在我需要记录一些来自静态类.

I'm logging just fine using dependency injection on my controllers, now I need to log something from a static class.

我怎样才能从一个静态类登录?

How can I log from a static class?

我不能使用依赖注入，因为它是静态的，我不能将现有的记录器对象传递给静态类，因为它会在日志文件中包含错误的类名称.

I can't use dependency injection because it's static and I can't just pass in an existing logger object to the static class because it would have the wrong name of class in the log file.

换句话说，如何从静态类中的记录器工厂获取记录器?

In other words how can I get a logger from the loggerfactory inside my static class?

我遇到了一个类似的问题，他们指出了一篇关于静态类中的记录器工厂的文章，但这实际上不起作用，因为我无法从中获取新的记录器，因为它不会接受静态类作为参数:

I came across a similar question and they pointed to an article on a loggerfactory in a static class but that doesn't actually work as I can't get a new logger from it because it won't accept a static class as the parameter:

静态类型不能用作类型参数"

"Static types cannot be used as type arguments"

推荐答案

解决方案是在启动时初始化的实用程序静态类中对 LoggerFactory 进行静态引用:

Solution is to have a static reference to the LoggerFactory in a utility static class initialized on startup:

/// <summary>
    /// Shared logger
    /// </summary>
    internal static class ApplicationLogging
    {
        internal static ILoggerFactory LoggerFactory { get; set; }// = new LoggerFactory();
        internal static ILogger CreateLogger<T>() => LoggerFactory.CreateLogger<T>();        
        internal static ILogger CreateLogger(string categoryName) => LoggerFactory.CreateLogger(categoryName);

    }

您在 Startup.cs 上初始化的内容:

Which you intialize on Startup.cs:

 public Startup(ILogger<Startup> logger, ILoggerFactory logFactory, IHostingEnvironment hostingEnvironment)
        {
            _log = logger;
            _hostingEnvironment = hostingEnvironment;
            Util.ApplicationLogging.LoggerFactory = logFactory;//<===HERE

        }

然后你可以像这样从你的静态类构建一个记录器来使用:

Then you can build a logger to use from your static class like so:

internal static class CoreJobSweeper
    {
        private static ILogger log = Util.ApplicationLogging.CreateLogger("CoreJobSweeper");

这篇关于从静态类记录 ASP.NET Core Web API的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！