【记录】.net 通用log4net日志配置

asp.net mvc

1、引入log4netNuGet包。

2、修改Global.asax下的Application_Start方法。加入log4net.Config.XmlConfigurator.Configure()，修改如下：

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();
    GlobalConfiguration.Configure(WebApiConfig.Register);
    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    RouteConfig.RegisterRoutes(RouteTable.Routes);
    BundleConfig.RegisterBundles(BundleTable.Bundles);

    log4net.Config.XmlConfigurator.Configure();
}

3、修改web.config文件，增加以下节点配置：

<configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"/>
</configSections>
<log4net configSource="Config\log4net.config" />

4、在项目中新建Config文件夹，用于存放配置文件。

5、在文件夹下新建文件log4net.config，内容如下：

<?xml version="1.0"?>
<log4net>
  <root>
    <level value="DEBUG"/>
    <appender-ref ref="SysAppender"/>
    <appender-ref ref="consoleApp"/>
  </root>
  <!--信息日志配置-->
  <appender name="SysAppender" type="log4net.Appender.RollingFileAppender">
    <param name="File" value="Logs\\" />
    <param name="AppendToFile" value="true" />
    <param name="MaximumFileSize" value="20MB" />
    <param name="MaxSizeRollBackups" value="100" />
    <param name="StaticLogFileName" value="false" />
    <param name="DatePattern" value="\\yyyyMM\\yyyyMMdd&quot;.log&quot;" />
    <param name="RollingStyle" value="Composite" />
    <layout type="log4net.Layout.PatternLayout">
      <param name="ConversionPattern" value="%n
--------------------------------------------------------------------------------------
%n日志时间：%d [%t] %n日志级别：%-5p %n日 志 类：%c [%x] %n%m %n" />
      <param name="Header" value="
======================================================================================
" />
    </layout>
  </appender>
  <appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net">
    <layout type="log4net.Layout.PatternLayout,log4net">
      <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
    </layout>
  </appender>
  <logger name="WebLogger">
    <level value="DEBUG"/>
  </logger>

</log4net>

调用示例：

private log4net.ILog log = log4net.LogManager.GetLogger("TestJob");
public void Execute(IJobExecutionContext context)
{
    var logContent = string.Format("{0}==>>{1}{2}", DateTime.Now, "create new log.", Environment.NewLine);
    log.Info(logContent);
}

.net core

新建Log4netHelper类，内容如下：

using log4net;
using log4net.Repository;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Reflection;
using System.Text;

namespace Five.ScheduleQuartz.Utils.Tool
{
    /// <summary>
    /// 日志等级
    /// </summary>
    public enum LogLevel
    {
        Error,
        Debug,
        Warning,
        Info
    }
    /// <summary>
    /// 单例模式初始化
    /// </summary>
    public class Singleton
    {
        private ILog Log;
        private static Singleton instance;
        private Singleton() { }
        public static Singleton getInstance()
        {
            if (instance == null)
            {
                instance = new Singleton();
            }
            return instance;
        }
        /// <summary>
        /// 获取日志初始化器
        /// </summary>
        /// <param name="type">类名 方法名</param>
        /// <returns></returns>
        public ILog Init(string type)
        {
            Log = LogManager.GetLogger(Log4netHelper.Repository.Name, type);
            return Log;
        }
    }
    /// <summary>
    /// 日志操作类
    /// </summary>
    public class Log4netHelper
    {
        /// <summary>
        /// log4net 仓储
        /// </summary>
        public static ILoggerRepository Repository { get; set; }
        /// <summary>
        /// 输出Erro日志
        /// </summary>
        /// <param name="message">日志内容</param>
        public static void Error(string message)
        {
            StackTrace trace = new StackTrace();
            //获取是哪个类来调用的
            var className = trace.GetFrame().GetMethod().DeclaringType;
            //获取方法名称
            MethodBase method = trace.GetFrame().GetMethod();
            var type = "类名：" + className.Namespace + "\r\n\r\t\r\r方法名：" + method.Name;
            WriteLog(LogLevel.Error, message, type);
        }
        /// <summary>
        /// 输出Warning日志
        /// </summary>
        /// <param name="message">日志内容</param>
        public static void Warning(string message)
        {
            StackTrace trace = new StackTrace();
            //获取是哪个类来调用的
            var className = trace.GetFrame().GetMethod().DeclaringType;
            //获取方法名称
            MethodBase method = trace.GetFrame().GetMethod();
            var type = "类名：" + className.Namespace + "\r\n\r\t\r\r方法名：" + method.Name;
            //记录日志
            WriteLog(LogLevel.Warning, message, type);
        }
        /// <summary>
        /// 输出Info日志
        /// </summary>
        /// <param name="message">日志内容</param>
        public static void Info(string message)
        {
            StackTrace trace = new StackTrace();
            //获取是哪个类来调用的
            var className = trace.GetFrame().GetMethod().DeclaringType;
            //获取方法名称
            MethodBase method = trace.GetFrame().GetMethod();
            var type = "类名：" + className.Namespace + "\r\n\r\t\r\r方法名：" + method.Name;
            //记录日志
            WriteLog(LogLevel.Info, message, type);
        }
        /// <summary>
        /// 输出Debug日志
        /// </summary>
        /// <param name="message">日志内容</param>
        public static void Debug(string message)
        {
            StackTrace trace = new StackTrace();
            //获取是哪个类来调用的
            var className = trace.GetFrame().GetMethod().DeclaringType;
            //获取方法名称
            MethodBase method = trace.GetFrame().GetMethod();
            var type = "类名：" + className.Namespace + "\r\n\r\t\r\r方法名：" + method.Name;
            //记录日志
            WriteLog(LogLevel.Debug, message, type);
        }
        /// <summary>
        /// 写日志
        /// </summary>
        /// <param name="logLevel">日志等级</param>
        /// <param name="message">日志信息</param>
        /// <param name="type">类名 方法名</param>
        private static void WriteLog(LogLevel logLevel, string message, string type)
        {
            ILog Log = Singleton.getInstance().Init(type);
            switch (logLevel)
            {
                case LogLevel.Debug:
                    Log.Debug(message);
                    break;
                case LogLevel.Error:
                    Log.Error(message);
                    break;
                case LogLevel.Info:
                    Log.Info(message);
                    break;
                case LogLevel.Warning:
                    Log.Warn(message);
                    break;
            }

        }
    }
}

修改Startup如下：

public Startup(IConfiguration configuration)
{
    Configuration = configuration;
    //日志配置文件
    Log4netHelper.Repository = LogManager.CreateRepository("NETCoreRepository");
    XmlConfigurator.Configure(Log4netHelper.Repository, new FileInfo("./Config/log4net.config"));
 }

log4net.config配置文件内容参考上面的内容。

使用示例：

 Log4netHelper.Info("测试日志内容");