C#使用log4net打日志

	<configSections>
		<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
	</configSections>
	<log4net>
		<!--错误日志-->
		//
		<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
			<!-- 日志文件存放位置，可以为绝对路径也可以为相对路径 -->
			<file value="log\\LogError\\" />
			<!--是否支持分割文件-->
			<appendToFile value="true" />
			<!--日志文件的记录形式-->
			<rollingStyle value="Date" />
			<!-- 日志文件的命名规则 -->
			<datePattern value="yyyy\\yyyyMM\\yyyyMMdd'.txt'" />
			<!-- 当将日期作为日志文件的名字时，必须将staticLogFileName的值设置为false -->
			<staticLogFileName value="false" />
			<!--当日志文件达到MaxFileSize大小，就自动创建备份文件。-->
			<param name="MaxSizeRollBackups" value="100" />
			<!--日志文件的布局格式-->
			<layout type="log4net.Layout.PatternLayout">
				<!--每条日志末尾的文字说明-->
				<!--输出格式-->
				<!--样例：2008-03-26 13:42:32,111 [10] INFO  Log4NetDemo.MainClass [(null)] - info-->
				<conversionPattern value="%newline %n记录时间：%date %n线程ID:[%thread] %n日志级别：  %-5level %n错误描述：%message%newline %n" />
			</layout>
		</appender>
 
		<!--Info日志-->
		<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="yyyy\\yyyyMM\\yyyyMMdd'.txt'" />
			<param name="RollingStyle" value="Date" />
			<layout type="log4net.Layout.PatternLayout">
				<conversionPattern value="%newline %n记录时间：%date %n线程ID:[%thread] %n日志级别：  %-5level %n日志描述：%message%newline %n" />
			</layout>
		</appender>
 
		<!--监控日志-->
		<appender name="MonitorAppender" type="log4net.Appender.RollingFileAppender">
			<param name="File" value="Log\\LogMonitor\\" />
			<param name="AppendToFile" value="true" />
			<param name="MaxFileSize" value="10240" />
			<param name="MaxSizeRollBackups" value="100" />
			<param name="StaticLogFileName" value="false" />
			<param name="DatePattern" value="yyyy\\yyyyMM\\yyyyMMdd'.txt'" />
			<param name="RollingStyle" value="Date" />
			<layout type="log4net.Layout.PatternLayout">
				<conversionPattern value="%newline %n记录时间：%date %n线程ID:[%thread] %n日志级别：  %-5level %n跟踪描述：%message%newline %n" />
			</layout>
		</appender>
 
		<!--Error日志-->
		<logger name="LogError">
			<level value="ERROR" />
			<appender-ref ref="RollingLogFileAppender" />
		</logger>
 
		<!--Info日志-->
		<logger name="LogInfo">
			<level value="INFO" />
			<appender-ref ref="InfoAppender" />
		</logger>
 
		<!--监控日志-->
		<logger name="LogMonitor">
			<level value="Monitor" />
			<appender-ref ref="MonitorAppender" />
		</logger>
	</log4net>

public class LoggerHelper
    {
        private static readonly log4net.ILog LogInfo = log4net.LogManager.GetLogger("LogInfo");
 
        private static readonly log4net.ILog LogError = log4net.LogManager.GetLogger("LogError");
 
        private static readonly log4net.ILog LogMonitor = log4net.LogManager.GetLogger("LogMonitor");
 
        /// <summary>
        /// 记录Error日志
        /// </summary>
        /// <param name="errorMsg"></param>
        /// <param name="ex"></param>
        public static void Error(string errorMsg, Exception ex = null)
        {
            if (ex != null)
            {
                LogError.Error(errorMsg, ex);
            }
            else
            {
                LogError.Error(errorMsg);
            }
        }
 
        /// <summary>
        /// 记录Info日志
        /// </summary>
        /// <param name="msg"></param>
        /// <param name="ex"></param>
        public static void Info(string msg, Exception ex = null)
        {
            if (ex != null)
            {
                LogInfo.Info(msg, ex);
            }
            else
            {
                LogInfo.Info(msg);
            }
        }
 
        /// <summary>
        /// 记录Monitor日志
        /// </summary>
        /// <param name="msg"></param>
        public static void Monitor(string msg)
        {
            LogMonitor.Info(msg);
        }
    }