log4net配置使用

到nuget里下载log4net

 这里为帮组类 可以改为静态方法 

        private static ILog logger;
        static LogImp()//这个是构造函数
        {
            if (logger == null)
            {
                var repository = LogManager.CreateRepository("WebApplication1");///这里改为项目名称
                //指定配置文件
                XmlConfigurator.Configure(repository, new FileInfo("log4net.config"));
                lock (locker)
                {
                    if (logger == null)
                    {
                        lock (locker)
                            logger = LogManager.GetLogger(repository.Name, "RollingLogFileAppender");
                    }
                }

            }
        }

  /// 

        /// 调试信息
        /// 
        /// 
        /// 
        public void Debug(string message, Exception exception = null)
        {

            if (exception == null)
                logger.Debug(message);
            else
                logger.Debug(FormartLog(message, exception));

        }
        /// 

        /// 一般信息
        /// 
        /// 
        /// 
        public void Info(string message, Exception exception = null)
        {

            if (exception == null)
                logger.Info(message);
            else
                logger.Info(FormartLog(message, exception));
        }

        /// 

        /// 警告
        /// 
        /// 
        /// 
        public void Warn(string message, Exception exception = null)
        {

            if (exception == null)
                logger.Warn(message);
            else
                logger.Warn(FormartLog(message, exception));

        }

        /// 

        /// 一般错误
        /// 
        /// 
        /// 
        public void Error(string message, Exception exception = null)
        {

            if (exception == null)
                logger.Error(message);
            else
                logger.Error(FormartLog(message, exception));
        }


        /// 

        /// 致命错误
        /// 
        /// 
        /// 
        public void Fatal(string message, Exception exception = null)
        {

            if (exception == null)
                logger.Fatal(message);
            else
                logger.Fatal(FormartLog(message, exception));

        }


        /// 

        /// 自定义返回格式
        /// 
        /// 
        /// 
        /// 
        private static string FormartLog(string throwMsg, Exception ex)
        {
            return string.Format("【错误地点】：{0} \r\n【异常类型】：{1} \r\n【异常信息】：{2} \r\n【堆栈调用】：{3}", new object[] { throwMsg, ex.GetType().Name, ex.Message, ex.StackTrace });
        }

然后打开项目在webapi下面安装Microsoft.Extensions.Logging.Log4Net.AspNetCore

<?xml version="1.0" encoding="utf-8"?>

    
        
"log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
    

    
        
        "RollingFileDebug" type="log4net.Appender.RollingFileAppender">
            
            "Log\\Debug\" />
            
            "true" />
            "MaxFileSize" value="10240"/>
            "MaxSizeRollBackups" value="100"/>
            
            "log4net.Appender.FileAppender+MinimalLock" />
            
            "Date" />
            
            "yyyy-MM-dd_HH'.log'" />
            
            "false" />
            "log4net.Layout.PatternLayout">
                "【异常时间】：%date【线程ID】：%thread%newline【异常级别】：%5level%newline%message%newline--------------------------------------------------------------------%newline" />
            
            "log4net.Filter.LevelRangeFilter">
                "LevelMin" value="Debug" />
                "LevelMax" value="Debug" />
            
        

        
        "RollingFileInfo" type="log4net.Appender.RollingFileAppender">
            
            "Log\\Info\\" />
            
            "true" />
            "MaxFileSize" value="10240"/>
            "MaxSizeRollBackups" value="100"/>
            
            "log4net.Appender.FileAppender+MinimalLock" />
            
            "Date" />
            
            "yyyy-MM-dd_HH'.log'" />
            
            "false" />
            "log4net.Layout.PatternLayout">
                "【异常时间】：%date【线程ID】：%thread%newline【异常级别】：%5level%newline%message%newline--------------------------------------------------------------------%newline" />
            
            "log4net.Filter.LevelRangeFilter">
                "LevelMin" value="Info" />
                "LevelMax" value="Info" />
            
        

        
        "RollingFileWarn" type="log4net.Appender.RollingFileAppender">
            
            "Log\\Warn\\" />
            
            "true" />
            "MaxFileSize" value="10240"/>
            "MaxSizeRollBackups" value="100"/>
            
            "log4net.Appender.FileAppender+MinimalLock" />
            
            "Date" />
            
            "yyyy-MM-dd_HH'.log'" />
            
            "false" />
            "log4net.Layout.PatternLayout">
                "【异常时间】：%date【线程ID】：%thread%newline【异常级别】：%5level%newline%message%newline--------------------------------------------------------------------%newline" />
            
            "log4net.Filter.LevelRangeFilter">
                "LevelMin" value="Warn" />
                "LevelMax" value="Warn" />
            
        

        
        "RollingFileError" type="log4net.Appender.RollingFileAppender">
            
            "Log\\Error\\" />
            
            "true" />
            "MaxFileSize" value="10240"/>
            "MaxSizeRollBackups" value="100"/>
            
            "log4net.Appender.FileAppender+MinimalLock" />
            
            "Date" />
            
            "yyyy-MM-dd_HH'.log'" />
            
            "false" />
            "log4net.Layout.PatternLayout">
                "【异常时间】：%date【线程ID】：%thread%newline【异常级别】：%5level%newline%message%newline--------------------------------------------------------------------%newline" />
            
            "log4net.Filter.LevelRangeFilter">
                "LevelMin" value="Error" />
                "LevelMax" value="Error" />
            
        

        
        "RollingFileFatal" type="log4net.Appender.RollingFileAppender">
            
            "Log\\Fatal\\" />
            
            "true" />
            "MaxFileSize" value="10240"/>
            "MaxSizeRollBackups" value="100"/>
            
            "log4net.Appender.FileAppender+MinimalLock" />
            
            "Date" />
            
            "yyyy-MM-dd_HH'.log'" />
            
            "false" />
            "log4net.Layout.PatternLayout">
                "【异常时间】：%date【线程ID】：%thread%newline【异常级别】：%5level%newline%message%newline--------------------------------------------------------------------%newline" />
            
            "log4net.Filter.LevelRangeFilter">
                "LevelMin" value="Fatal" />
                "LevelMax" value="Fatal" />
            
        

        "RollingLogFileAppender">
            "ALL" />
            ref ref="RollingFileDebug" />
            ref ref="RollingFileInfo" />
            ref ref="RollingFileWarn" />
            ref ref="RollingFileError" />
            ref ref="RollingFileFatal" />
        

        
    

这个分类分等级了

 改为始终复制 运行项目进行日志使用 就会发现在项目文件夹下\bin\Debug\net6.0发现log文件夹