Log4Net无法使用UnityContainer登录.NET WebApi项目 [英] Log4Net not logging in .NET WebApi project using UnityContainer

问题描述

我有一个非常基本的C#.NET WebApi项目，使用Unity.AspNet.WebApi和Unity.Mvc进行依赖项注入，并使用Unity.log4net进行日志记录.

I have a very basic C# .NET WebApi project using Unity.AspNet.WebApi and Unity.Mvc for dependency injection and Unity.log4net for logging.

注入到我的控制器中似乎工作正常.问题是记录器从不记录任何内容.永远不会创建预期的.log文件.当我在调试时检查记录器对象时，它已禁用所有级别(IsDebugEnable = false，IsErrorEnabled = false等)

The injection into my controllers seems to be working correctly. The problem is that the logger never logs anything. The expected .log file is never created. When I inspect the logger object while debugging it has all the levels disabled (IsDebugEnable = false, IsErrorEnabled = false, etc.)

它正在运行，好像已经忽略了我的log4net.config文件.在我项目的根目录中，我有一个log4net.config文件，该文件定义了一个控制台和一个文件附加器.

It is running as if has ignored my log4net.config file. In the root of my project I have a log4net.config file that defines a console and a file appender.

<log4net>
  <root>
    <level value="ALL" />
    <appender-ref ref="console" />
    <appender-ref ref="file" />
  </root>
  <appender name="console" type="log4net.Appender.ConsoleAppender">
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date %level %logger - %message%newline" />
    </layout>
  </appender>
  <appender name="file" type="log4net.Appender.RollingFileAppender">
    <file value="DemoWebApiUnityLog4Net.log" />
    <appendToFile value="true" />
    <rollingStyle value="Size" />
    <maxSizeRollBackups value="5" />
    <maximumFileSize value="10MB" />
    <staticLogFileName value="true" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date [%thread] %level %logger - %message%newline" />
    </layout>
  </appender>
</log4net>

我已将此行添加到AssemblyInfo.cs

I have added this line to AssemblyInfo.cs

[assembly: log4net.Config.XmlConfigurator(ConfigFile = @"log4net.config", Watch = true)]

log4net通过以下行在UnityConfig.cs中注册到Unity容器中:

The log4net was registered in to the Unity container in UnityConfig.cs with this line:

container.AddNewExtension<Log4NetExtension>();

完整的演示项目可以在这里找到: https://github.com/CarmonColvin/DemoWebApiUnityLog4Net

The full demo project can be found here: https://github.com/CarmonColvin/DemoWebApiUnityLog4Net

我尝试过的所有操作均未成功完成日志.感谢您的帮助.

Nothing I have tried has resulted in a successful log. Any help is appreciated.

推荐答案

根据log4net 常见问题解答:

According to the log4net FAQ:

如果要通过在程序集上指定程序集级别属性来配置log4net，则在首次调用LogManager.GetLogger时将加载配置.必须在具有配置属性的程序集中进行在过程(或AppDomain)中对LogManager.GetLogger的第一次调用. Log4net只会在配置属性的第一个调用程序集上查找一次.

If you are configuring log4net by specifying assembly level attributes on your assembly then the configuration will be loaded once the first call to the LogManager.GetLogger is made. It is necessary that the first call to LogManager.GetLogger made during the process (or AppDomain) is made from the assembly that has the configuration attributes. Log4net will look only once and only on the first calling assembly for the configuration attributes.

因此，在我看来，应该在应用程序启动时在Global.asax中调用LogManager.GetLogger()来加载配置.像这样:

So it sounds to me like you should be calling LogManager.GetLogger() in Global.asax when the application starts in order to load your configuration. Something like:

using log4net;

protected void Application_Start(object sender, EventArgs e)
{
    var logger = LogManager.GetLogger(typeof(Global));
    logger.Info("Application started.");
}

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