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  • asp.net core 3.1 使用log4net

    1.引用Log4net到项目中,搜NuGet包  Log4net 现在最新是 Version 2.0.8

    2.在项目中添加log4net.config文件,右键改文件属性-》复制到输出目录选择-》始终复制

    <?xml version="1.0" encoding="utf-8" ?>
    <log4net>
      <appender name="DebugAppender" type="log4net.Appender.DebugAppender" >
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
        </layout>
      </appender>
      <!--指定日记记录方式,以滚动文件的方式(文件记录)-->
      <appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
        <!--日志路径-->
        <file value="Log/" />
        <!--是否是向文件中追加日志-->
        <appendToFile value="true" />
        <!--log保留天数-->
        <param name= "MaxSizeRollBackups" value= "10"/>
        <!--每个文件最大1M-->
        <param name="maximumFileSize" value="1MB" />
        <!--日志根据日期滚动-->
        <param name="RollingStyle" value="Date" />
        <!--日志文件名格式为:logs_20080831.log-->
        <param name="DatePattern" value="&quot;logs_&quot;yyyyMMdd&quot;.log&quot;" />
        <!--日志文件名是否是固定不变的-->
        <param name="StaticLogFileName" value="false" />
        <!--布局-->
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%date %5level %logger.%method [%line] - MESSAGE: %message%newline %exception" />
        </layout>
      </appender>
      <root>
        <level value="ALL"/>
        <appender-ref ref="DebugAppender" />
        <appender-ref ref="RollingFile" />
      </root>
    </log4net>

    3.编写Log4netHelper

    using log4net;
    using log4net.Repository;
    using System;
    using System.Collections.Generic;
    using System.Diagnostics;
    using System.Reflection;
    using System.Text;
    
    namespace NF.Common.Utility
    {
        /// <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(1).GetMethod().DeclaringType;
                //获取方法名称
                MethodBase method = trace.GetFrame(1).GetMethod();
                var type = "类名:" + className.Namespace + "
    
    	
    
    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(1).GetMethod().DeclaringType;
                //获取方法名称
                MethodBase method = trace.GetFrame(1).GetMethod();
                var type = "类名:" + className.Namespace + "
    
    	
    
    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(1).GetMethod().DeclaringType;
                //获取方法名称
                MethodBase method = trace.GetFrame(1).GetMethod();
                var type = "类名:" + className.Namespace + "
    
    	
    
    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(1).GetMethod().DeclaringType;
                //获取方法名称
                MethodBase method = trace.GetFrame(1).GetMethod();
                var type = "类名:" + className.Namespace + "
    
    	
    
    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;
                }
    
            }
        }
    }

    4、修改Startup 在ConfigureServices(IServiceCollection services)方法里加入如下代码:

    Log4netHelper.Repository = LogManager.CreateRepository("NETCoreRepository");
                XmlConfigurator.Configure(Log4netHelper.Repository, new FileInfo(Environment.CurrentDirectory + "/Config/log4net.config"));
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  • 原文地址:https://www.cnblogs.com/linyijia/p/12986574.html
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