C # Use/configure Log4Net,

C # Use/configure Log4Net,

1. First add the Nuget package in the project...

2. Search for Log4Net in the NuGet form and click Install. <The installation process may take several minutes. Please wait.>

3. Add a Config file to the project. If App. config already exists, add the following content directly:

The XML Code configured in is as follows:

 

<Log4net> <logger name = "logerror"> <level value = "ERROR"/> <appender-ref = "ErrorAppender"/> </logger> <logger name =" loginfo "> <level value =" INFO "/> <appender-ref =" InfoAppender "/> </logger> <appender name =" ErrorAppender "type =" log4net. appender. rollingFileAppender "> <param name =" File "value =" Log \ LogError \ "/> <param name =" AppendToFile "value =" true "/> <param name = "MaxSizeRollBackups" valu E = "100"/> <param name = "MaxFileSize" value = "10240"/> <param name = "StaticLogFileName" value = "false"/> <param name =" datePattern "value =" yyyymmdd&quot=.txt & quot; "/> <param name =" RollingStyle "value =" Date "/> <layout type =" log4net. layout. patternLayout "> <param name =" ConversionPattern "value =" % n exception time: % d % n exception level: %-5 p % n exception content: % m % n "/> </layout> <! -- & Lt; & gt ;=<>% n = press enter --> </appender> <appender name = "InfoAppender" type = "log4net. appender. rollingFileAppender "> <param name =" File "value =" Log \ LogInfo \ "/> <param name =" AppendToFile "value =" true "/> <param name = "MaxFileSize" value = "10240"/> <param name = "MaxSizeRollBackups" value = "100"/> <param name = "StaticLogFileName" value = "false"/> <param name = "DatePattern" value = "yyyyMMdd&quot;.txt & quot; "/> <param name =" RollingStyle "value =" Date "/> <layout type =" log4net. layout. patternLayout "> <param name =" ConversionPattern "value =" log time: % d % n log level: %-5 p % n log Content: % m % n "/> </layout> </appender> </log4net>

 

Finally, register the Config file in the AssemblyInfo. cs file of the project, as shown below:

 

// Register the Log4Net. config configuration file for the project [assembly: log4net. Config. XmlConfigurator (ConfigFileExtension = "config", Watch = true)]

Finally, add the log class:

 

    public class LogHelper    {        private LogHelper()        {        }        public static readonly log4net.ILog loginfo = log4net.LogManager.GetLogger("loginfo");        public static readonly log4net.ILog logerror = log4net.LogManager.GetLogger("logerror");        public static void SetConfig()        {            log4net.Config.XmlConfigurator.Configure();        }        public static void SetConfig(FileInfo configFile)        {            log4net.Config.XmlConfigurator.Configure(configFile);        }        public static void WriteLog(string info)        {            if (loginfo.IsInfoEnabled)            {                loginfo.Info(info);            }        }        public static void WriteLog(string info, Exception se)        {            if (logerror.IsErrorEnabled)            {                logerror.Error(info, se);            }        }    }

 

Now, the preparation is complete. Let's test it.

 

By default, log files are recorded in the root directory. You can change the path in config.