log4net 配置应用

（一）. WinForm 或者 WPF 中的配置和应用

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandle,log4net"/>
  </configSections>

  <log4net>
    <root>
      <level value="INFO  " />   <!-- 日志等级  OFF > FATAL > ERROR > WARN > INFO > DEBUG  > ALL -->
      <appender-ref ref="LogFileAppender" />
    </root>
    <!--<logger name="WebLogger">
      <level value="WARN"/>
      <appender-ref ref="LogFileAppender" />
    </logger>-->
    
    <appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender" >
      <param name="File"  value="D:Log/"/>
      <param name="AppendToFile" value="true" />
      <param name="DatePattern" value="&quot;Logs_&quot;yyyyMMdd&quot;.txt&quot;" />
      <param name="StaticLogFileName" value="false" />
      <param name="RollingStyle" value="Date" />
      <param name="DatePattern" value="yyyy-MM-dd&quot;.txt&quot;" />
      <!--<file value="./log.txt" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <maxSizeRollBackups value="-1" />
      <maximumFileSize value="1MB" />
      <staticLogFileName value="false" />
      <DatePattern value="yyyy-MM-dd&quot;.txt&quot;"/>-->
      <!--<datePattern value="yyyyMMdd-HH:mm:ss" />-->
      <layout type="log4net.Layout.PatternLayout">
        <!--每条日志开始的文字说明-->
        <param name="Header" value="[Header]
" />
        <!--每条日志末尾的文字说明-->
        <param name="Footer" value="[Footer]
"/>
        <!--输出格式-->
        <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
        <!--<conversionPattern value="%date  %-5level  - %message%newline" />-->
      </layout>
    </appender>
  </log4net>
</configuration>

　　　　　　　var path = AppDomain.CurrentDomain.BaseDirectory + @"log4net_config.xml";//获取配置文件路径
            //var path = AppDomain.CurrentDomain.BaseDirectory + @"log4netConfig.xml";
            log4net.Config.XmlConfigurator.Configure(new FileInfo(path));

            log4net.ILog log = log4net.LogManager.GetLogger(this.GetType());
            if (log.IsWarnEnabled)
                log.Warn("message");

 (二).MVC 4  应用

  <configSections>
<!--Lo4Net 配置-->
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandle,log4net"/>
  </configSections>
<log4net>
    <!-- OFF, FATAL, ERROR, WARN, INFO, DEBUG, ALL -->
    <!-- Set root logger level to ERROR and its appenders -->
    <root>
      <level value="ERROR"/>
      <appender-ref ref="SysAppender"/>
    </root>

    <!-- Print only messages of level DEBUG or above in the packages -->
    <!--<logger name="WebLogger">
      <level value="DEBUG"/>
    </logger>-->

    <appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net" >
      <file value="App_Data/Log/" />　　　　<!--  一定注意路径  -->
      <param name="AppendToFile" value="true" />
      <param name="DatePattern" value="&quot;Logs_&quot;yyyyMMdd&quot;.txt&quot;" />
      <param name="StaticLogFileName" value="false" />
      <param name="RollingStyle" value="Date" />
      <!--<file value="./log.txt" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <maxSizeRollBackups value="-1" />
      <maximumFileSize value="1MB" />
      <staticLogFileName value="false" />
      <DatePattern value="yyyy-MM-dd&quot;.txt&quot;"/>-->
      <!--<datePattern value="yyyyMMdd-HH:mm:ss" />-->
      <layout type="log4net.Layout.PatternLayout">
        <!--每条日志开始的文字说明-->
        <!--<param name="Header" value="[Header]
" />-->
        <!--每条日志末尾的文字说明-->
        <!--<param name="Footer" value="[Footer]
"/>-->
        <!--输出格式-->
        <!--<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />-->
         <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
        <param name="Header" value="&#13;&#10;----------------------header--------------------------&#13;&#10;" />
        <param name="Footer" value="&#13;&#10;----------------------footer--------------------------&#13;&#10;" />
      </layout>
    </appender>
    <appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net">
      <layout type="log4net.Layout.PatternLayout,log4net">
        <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
      </layout>
    </appender>
  </log4net>

 public class MvcApplication : SpringMvcApplication
{
    　　protected void Application_Start()
        {
            //log4net 注册,使用路径
            log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo(Server.MapPath("~/Web.config")));

　　　　　　　　ILog logger = LogManager.GetLogger(this.GetType());
　　　　　　　　logger.Error(e.ToString());//将异常信息写到磁盘上.

        }
}    

 (三)数据库写入日志配置

<!--数据库记录日志-->
    <appender name="AdoNetAppender_SqlServer" type="log4net.Appender.AdoNetAppender">
      <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
      <connectionString value="server=192.168.1.188MSSQLSERVER2008;database=HotelMIS;uid=sa;pwd=123456;" />
      <commandText value="insert into Log(LogLevel, Msg, Exception, Cdt) values(@LogLevel, @Msg, @Exception, @Cdt)" />
      <bufferSize value="1" />
      <parameter>
        <parameterName value="@LogLevel" />
        <dbType value="String" />
        <size value="128" />
        <layout type="log4net.Layout.PatternLayout" >
          <conversionPattern value="%level" />
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@Msg" />
        <dbType value="String" />
        <size value="1024" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%message" />
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@Exception" />
        <dbType value="String" />
        <size value="10240" />
        <layout type="log4net.Layout.ExceptionLayout" />
      </parameter>
      <parameter>
        <parameterName value="@Cdt" />
        <dbType value="DateTime" />
        <layout type="log4net.Layout.RawTimeStampLayout" />
      </parameter>
    </appender>

(四) 关于单独出来的Log帮助类的写法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

[assembly: log4net.Config.XmlConfigurator(Watch = false)]
namespace Util
{
     public class Log
    {
         public static void Error(string msg)
         {
             //log4net 注册,使用路径
             //log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo("~/Web.config"));
             ILog logger = LogManager.GetLogger("WebLogger");
             logger.Error(msg);//将异常信息写到磁盘上.
         }


    }
}