log4net使用

一：下载log4net的程序集下载地址：

http://logging.apache.org/log4net/

使用情况：

二、配置文件设置 Config配置文件log4net.xml

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
  </configSections>
  <log4net>
    <root name="Logger">
      <level value="ALL" />
      <appender-ref ref="TraceLog"/>
      <appender-ref ref="WarnLog" />
      <appender-ref ref="ErrorLog" />
    </root>
    <appender name="TraceLog" type="log4net.Appender.RollingFileAppender,log4net" >
      <file value="Log\Trace\" />
      <appendToFile value="true" />
      <rollingStyle value="Date" />
      <datePattern value="yyyy-MM-dd&quot;.LOG&quot;" />
      <staticLogFileName value="false" />
      <layout type="log4net.Layout.PatternLayout,log4net">
        <conversionPattern value="%newline %n记录时间：%d %n线程ID:[%thread] %n日志级别： %-5level %n描述：%message %n ---------------------------------------------------------------%newline"/>
        <footer value="---------------------------------------------------------------"/>
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="INFO" />
        <levelMax value="INFO" />
      </filter>
    </appender>
    <appender name="WarnLog" type="log4net.Appender.RollingFileAppender,log4net" >
      <file value="Log\Warn\" />
      <appendToFile value="true" />
      <rollingStyle value="Date" />
      <datePattern value="yyyy-MM-dd&quot;.LOG&quot;" />
      <staticLogFileName value="false" />
      <layout type="log4net.Layout.PatternLayout,log4net">
        <conversionPattern value="%newline %n记录时间：%d %n线程ID:[%thread] %n日志级别： %-5level%n警告描述：%message %n异常信息：%n%exception %n ---------------------------------------------------------------%newline"/>
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="WARN" />
        <levelMax value="WARN" />
      </filter>
    </appender>
    <appender name="ErrorLog" type="log4net.Appender.RollingFileAppender,log4net" >
      <file value="Log\Error\" />
      <appendToFile value="true" />
      <rollingStyle value="Date" />
      <datePattern value="yyyy-MM-dd&quot;.LOG&quot;" />
      <staticLogFileName value="false" />
      <layout type="log4net.Layout.PatternLayout,log4net">
        <conversionPattern value="%newline %n记录时间：%d %n线程ID:[%thread] %n日志级别： %-5level %n错误描述：%message %n异常信息：%n%exception %n ---------------------------------------------------------------%newline"/>
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="ERROR" />
        <levelMax value="ERROR" />
      </filter>
    </appender>
  </log4net>
</configuration>

三、Logger工具类：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;

namespace MvcApplication.Models
{
    public class Logger
    {
        private static readonly log4net.ILog log = log4net.LogManager.GetLogger("Logger");
        static Logger()
        {
            string path = string.Format(@"{0}Config\log4net.xml", AppDomain.CurrentDomain.BaseDirectory);
            if (File.Exists(path))
            {
                log4net.Config.XmlConfigurator.ConfigureAndWatch(new FileInfo(path));
            }
        }
        /// <summary>
        /// 记录普通业务日志
        /// </summary>
        /// <param name="info"></param>
        public static void Info(object info)
        {
            if (log.IsInfoEnabled)
            {
                log.Info(info);
            }
        }

        /// <summary>
        /// 记录警告日志
        /// </summary>
        /// <param name="warn"></param>
        public static void Warn(object warn)
        {
            if (log.IsWarnEnabled)
            {
                log.Warn(warn);
            }
        }
        /// <summary>
        /// 记录警告日志
        /// </summary>
        /// <param name="warn"></param>
        public static void Warn(object warn, Exception ex)
        {
            if (log.IsWarnEnabled)
            {
                log.Warn(warn, ex);
            }
        }


        /// <summary>
        /// 记录异常日志
        /// </summary>
        /// <param name="error"></param>
        public static void Error(object error)
        {
            if (log.IsErrorEnabled)
            {
                log.Error(error);
            }
        }

        /// <summary>
        /// 记录异常日志
        /// </summary>
        /// <param name="error"></param>
        /// <param name="ex"></param>
        public static void Error(object error, Exception ex)
        {
            if (log.IsWarnEnabled)
            {
                log.Error(error, ex);
            }
        }
    }
}

四、测试代码：（mvc web测试）

  public ActionResult Index()
        {

            Logger.Info("log4net日志测试!!!!");

            try
            {
                string a = null;
                int len = a.Length;
            }
            catch (Exception ex)
            {
                Logger.Error("程序异常", ex);

            }

            return View();
        }