神啊，看看Log4Net这个东西吧

这个东西实在是让人感动的想哭囊…………-_-。。。。。

Log4Net.config文件

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="log4net" type="System.Configuration.IgnoreSectionHandler"/>
  </configSections>
    <system.web>
      <compilation debug="true" targetFramework="4.0" />
    </system.web>
  <!--站点日志配置部分-->
  <log4net>
    <root>
      <!--控制级别，由低到高: ALL|DEBUG|INFO|WARN|ERROR|FATAL|OFF-->
      <!--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-->
      <!--如果没有定义LEVEL的值，则缺省为DEBUG-->
      <level value="all" />
      <appender-ref ref="INFOAppender" />
      <appender-ref ref="DEBUGAppender" />
      <appender-ref ref="WARNAppender" />
      <appender-ref ref="ERRORAppender" />
      <appender-ref ref="FATALAppender" />
      <appender-ref ref="ColoredConsole" />
      <appender-ref ref="TraceAppender" />
    </root>
    <appender name="INFOAppender" type="log4net.Appender.RollingFileAppender">
      <file value="admin\logs\info\" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <datePattern value="yyyy\yyyyMM\yyyyMMdd'.log'" />
      <staticLogFileName value="false"/>
      <maxSizeRollBackups value="100" />
      <maximumFileSize value="10MB" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <param name="LevelMin" value="INFO"/>
        <param name="LevelMax" value="INFO"/>
      </filter>
    </appender>
    <appender name="DEBUGAppender" type="log4net.Appender.RollingFileAppender">
      <file value="admin\logs\debug\" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <datePattern value="yyyy\yyyyMM\yyyyMMdd'.log'" />
      <staticLogFileName value="false"/>
      <maxSizeRollBackups value="100" />
      <maximumFileSize value="10MB" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <param name="LevelMin" value="DEBUG"/>
        <param name="LevelMax" value="DEBUG"/>
      </filter>
    </appender>
    <appender name="WARNAppender" type="log4net.Appender.RollingFileAppender">
      <file value="admin\logs\warn\" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <datePattern value="yyyy\yyyyMM\yyyyMMdd'.log'" />
      <staticLogFileName value="false"/>
      <maxSizeRollBackups value="100" />
      <maximumFileSize value="10MB" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <param name="LevelMin" value="WARN"/>
        <param name="LevelMax" value="WARN"/>
      </filter>
    </appender>
    <appender name="ERRORAppender" type="log4net.Appender.RollingFileAppender">
      <file value="admin\logs\error\" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <datePattern value="yyyy\yyyyMM\yyyyMMdd'.log'" />
      <staticLogFileName value="false"/>
      <maxSizeRollBackups value="100" />
      <maximumFileSize value="10MB" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <param name="LevelMin" value="ERROR"/>
        <param name="LevelMax" value="ERROR"/>
      </filter>
    </appender>
    <appender name="FATALAppender" type="log4net.Appender.RollingFileAppender">
      <file value="admin\logs\fatal\" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <datePattern value="yyyy\yyyyMM\yyyyMMdd'.log'" />
      <staticLogFileName value="false"/>
      <maxSizeRollBackups value="100" />
      <maximumFileSize value="10MB" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <param name="LevelMin" value="FATAL"/>
        <param name="LevelMax" value="FATAL"/>
      </filter>
    </appender>

    <appender name="TraceAppender" type="log4net.Appender.TraceAppender">
      <layout type="log4net.Layout.PatternLayout">
        <param name="conversionPattern" value="%newline*******************************************%newline%date [%thread] %-5level %logger [%property{NDC}] - %message%newline*******************************************%newline" />
      </layout>
    </appender>
  </log4net>
</configuration>

LogHelper.cs

using log4net;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "Log4Net.config", Watch = true)]
namespace DBUtility
{
    public class LogHelper
    {
        private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        public static void Debug(object ex)
        {
            Log.Debug(ex);
        }

        public static void Warn(object ex)
        {
            Log.Warn(ex);
        }

        public static void Error(object ex)
        {
            Log.Error(ex);
        }

        public static void Info(object ex)
        {
            Log.Info(ex);
        }

        public static void Debug(object message, Exception ex)
        {
            Log.Debug(message, ex);
        }

        public static void Warn(object message, Exception ex)
        {
            Log.Warn(message, ex);
        }

        public static void Error(object message, Exception ex)
        {
            Log.Error(message, ex);
        }

        public static void Info(object message, Exception ex)
        {
            Log.Info(message, ex);
        }
    }
}