log4net

  log4net 是一个可以帮助程序员把日志信息输出到各种 不同目标的 .NET 类库。Fireasy 提供了 log4net 对 日志管理器 的实现。

  修改配置文件如下：

• .Net Framework 下的 app.config 或 web.config 文件

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <sectionGroup name="fireasy">
      <section name="loggings" type="Fireasy.Common.Logging.Configuration.LoggingConfigurationSectionHandler, Fireasy.Common"/>
    </sectionGroup>
  </configSections>
  <fireasy>
    <loggings managed="Fireasy.Log4net.LogFactory, Fireasy.Log4net">
      <!--<logging name="log4net" type="Fireasy.Log4net.LogFactory,Fireasy.Log4net" />-->
    </loggings>
  </fireasy>
</configuration>

• .Net Core 下的 appsettings.json 文件

{
  "fireasy": {
    "loggings": {
      "settings": {
        "nlog": {
          "type": "Fireasy.Log4net.LogFactory, Fireasy.Log4net"
        }
      }
    }
  }
}

  在 .Net Core 应用中可以使用扩展方法 AddLog4netLogger 切换到 log4net 日志组件。如下所示：

namespace demo
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddFireasy().AddLog4netLogger(s => 
            {
                s.XmlFile = "mynlog.confg";
            });
        }
    }
}

  log4net 默认使用 log4net.config 配置文件，你可以由以上的参数设置自定义配置文件。以下是 log4net.config 文件的示例：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <!-- This section contains the log4net configuration settings -->
  <log4net>
    <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
      <layout type="log4net.Layout.PatternLayout" value="%date [%thread] %-5level %logger - %message%newline" />
    </appender>

    <appender name="FileAppender" type="log4net.Appender.FileAppender">
      <file value="logfile/log-file.log" />
      <appendToFile value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
    </appender>

    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <file value="logfile/" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <staticLogFileName value="false" />
      <datePattern value="yyyyMMdd'.log'" />
      <maxSizeRollBackups value="10" />
      <maximumFileSize value="1MB" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
    </appender>

    <!-- Setup the root category, add the appenders and set the default level -->
    <root>
      <level value="ALL" />
      <appender-ref ref="ConsoleAppender" />
      <appender-ref ref="FileAppender" />
      <appender-ref ref="RollingLogFileAppender" />
    </root>

  </log4net>
</configuration>