.net core2.0 中使用log4net

一、nuget安装log4net

二、添加log4net.config配置文件

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<?xml version="1.0" encoding="utf-8"?> <configuration>   <configSections>     <!--添加自定义节点：log4net type：解析类名，程序集名(log4net.dll)-->     <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>   </configSections>   <log4net>     <root>       <!--<level value="DEBUG"/>-->       <!--控制级别，由低到高: ALL|DEBUG|INFO|WARN|ERROR|FATAL|OFF  ALL表示允许所有的日志请求。OFF是拒绝所有的请求。-->       <!--比如定义级别为INFO，则INFO级别向下的级别，比如DEBUG日志将不会被记录-->       <level value="ALL"/>       <!--根据log级别记录到不同的日志文件-->       <appender-ref ref="ErrorLog" />     </root>     <!--Error-->     <appender name="ErrorLog" type="log4net.Appender.RollingFileAppender">       <file value="Log/"/>       <appendToFile value="true" />       <rollingStyle value="Date" />       <!--日期的格式，每天换一个文件记录，如不设置则永远只记录一天的日志，需设置-->       <DatePattern value="yyyyMMdd"_Error.log"" />       <!--日志文件名是否为静态-->       <StaticLogFileName value="false"/>       <!--多线程时采用最小锁定-->       <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />       <!--布局（向用户显示最后经过格式化的输出信息）-->       <layout type="log4net.Layout.PatternLayout">         <ConversionPattern value="%date 线程ID:[%thread] 日志级别：%-5level 出错类：%logger property:[%property{NDC}] - 错误描述：%message %newline" />       </layout>       <securityContext type="log4net.Util.WindowsSecurityContext">         <credentials value="Process" />       </securityContext>       <filter type="log4net.Filter.LevelRangeFilter">         <levelMin value="DEBUG" />         <levelMax value="ERROR" />       </filter>     </appender>     <!--Error-->   </log4net> </configuration>

三、编写loghelper

+ View Code?

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using GrabNovelApi; using log4net; using System; using System.Collections.Concurrent; using System.Collections.Generic; using System.Text;   namespace Grab.api {   public static class LogHelper     {         private static readonly ConcurrentDictionary<Type, ILog> Loggers = new ConcurrentDictionary<Type, ILog>();           /// <summary>         /// 获取记录器         /// </summary>         /// <param name="source">soruce</param>         /// <returns></returns>         private static ILog GetLogger(Type source)         {             if (Loggers.ContainsKey(source))             {                 return Loggers[source];             }             else             {                 ILog logger = LogManager.GetLogger(Startup.repository.Name,source);                 Loggers.TryAdd(source, logger);                 return logger;             }         }           /* Log a message object */           /// <summary>         /// 调试信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         public static void Debug(object source, string message)         {             Debug(source.GetType(), message);         }           /// <summary>         /// 调试信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="ps">ps</param>         public static void Debug(object source, string message, params object[] ps)         {             Debug(source.GetType(), string.Format(message, ps));         }           /// <summary>         /// 调试信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         public static void Debug(Type source, string message)         {             ILog logger = GetLogger(source);             if (logger.IsDebugEnabled)             {                 logger.Debug(message);             }         }           /// <summary>         /// 关键信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         public static void Info(object source, object message)         {             Info(source.GetType(), message);         }           /// <summary>         /// 关键信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         public static void Info(Type source, object message)         {             ILog logger = GetLogger(source);             if (logger.IsInfoEnabled)             {                 logger.Info(message);             }         }           /// <summary>         /// 警告信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         public static void Warn(object source, object message)         {             Warn(source.GetType(), message);         }           /// <summary>         /// 警告信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         public static void Warn(Type source, object message)         {             ILog logger = GetLogger(source);             if (logger.IsWarnEnabled)             {                 logger.Warn(message);             }         }           /// <summary>         /// 错误信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         public static void Error(object source, object message)         {             Error(source.GetType(), message);         }           /// <summary>         /// 错误信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         public static void Error(Type source, object message)         {             ILog logger = GetLogger(source);             if (logger.IsErrorEnabled)             {                 logger.Error(message);             }         }           /// <summary>         /// 失败信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         public static void Fatal(object source, object message)         {             Fatal(source.GetType(), message);         }           /// <summary>         /// 失败信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         public static void Fatal(Type source, object message)         {             ILog logger = GetLogger(source);             if (logger.IsFatalEnabled)             {                 logger.Fatal(message);             }         }           /* Log a message object and exception */           /// <summary>         /// 调试信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="exception">ex</param>         public static void Debug(object source, object message, Exception exception)         {             Debug(source.GetType(), message, exception);         }           /// <summary>         /// 调试信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="exception">ex</param>         public static void Debug(Type source, object message, Exception exception)         {             GetLogger(source).Debug(message, exception);         }           /// <summary>         /// 关键信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="exception">ex</param>         public static void Info(object source, object message, Exception exception)         {             Info(source.GetType(), message, exception);         }           /// <summary>         /// 关键信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="exception">ex</param>         public static void Info(Type source, object message, Exception exception)         {             GetLogger(source).Info(message, exception);         }           /// <summary>         /// 警告信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="exception">ex</param>         public static void Warn(object source, object message, Exception exception)         {             Warn(source.GetType(), message, exception);         }           /// <summary>         /// 警告信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="exception">ex</param>         public static void Warn(Type source, object message, Exception exception)         {             GetLogger(source).Warn(message, exception);         }           /// <summary>         /// 错误信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="exception">ex</param>         public static void Error(object source, object message, Exception exception)         {             Error(source.GetType(), message, exception);         }           /// <summary>         /// 错误信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="exception">ex</param>         public static void Error(Type source, object message, Exception exception)         {             GetLogger(source).Error(message, exception);         }           /// <summary>         /// 失败信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="exception">ex</param>         public static void Fatal(object source, object message, Exception exception)         {             Fatal(source.GetType(), message, exception);         }           /// <summary>         /// 失败信息         /// </summary>         /// <param name="source">source</param>         /// <param name="message">message</param>         /// <param name="exception">ex</param>         public static void Fatal(Type source, object message, Exception exception)         {             GetLogger(source).Fatal(message, exception);         }     } }

四、使用