log4net 使用

 1. 代码中使用配置文件：

log4net.Config.DOMConfigurator.Configure(new FileInfo("log4netConfig.xml")); 

 2.配置文件样例： 

 <?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="System.Configuration.IgnoreSectionHandler"/>
  </configSections>
  <appSettings>
  </appSettings>
  <log4net>

     <!--当前使用的log方式-->
    <root>

      <!--文件形式记录日志 -->
      <appender-ref ref="RollingFileAppender" />
      <!--控制台控制显示日志-->
      <appender-ref ref="ConsoleAppender" />
      <!--Windows事件日志-->
      <!--<appender-ref ref="EventLogAppender" />-->
      <!--数据库事件日志-->
      <!--<appender-ref ref="AdoNetAppender" />-->

    </root>

    <!--定义日志的输出媒介，下面定义日志以四种方式输出。也可以下面的按照一种类型或其他类型输出。-->

    <!--定义输出到文件中-->
    <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
      <!--定义文件存放位置-->
      <file type="log4net.Util.PatternString" value="%property{AppName}\" />
      <appendToFile value="true" />
      <rollingStyle value="Date" />
      <datePattern value="yyyyMMdd'.log'" />
      <staticLogFileName value="false"/>
      <maxSizeRollBackups value="10" />
      <maximumFileSize value="10MB" />
      <layout type="log4net.Layout.PatternLayout">
        <footer value="This log is written by UIH using log4net."/>
        <!--输出格式-->
        <!--样例：2008-03-26 13:42:32,111 [10] INFO - info-->
        <conversionPattern value="%date >> %-5level %message%newline" />
      </layout>
      <threshold value="ALL"/>
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="ALL" />
        <levelMax value="FATAL" />
      </filter>
    </appender>

    <!--定义输出到控制台命令行中-->
    <appender name="ConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%n%date >> %-5level %message%newline" />
      </layout>
      <mapping>
        <level value="FATAL" />
        <foreColor value="Red" />
        <backColor value="White" />
      </mapping>
      <mapping>
        <level value="ERROR" />
        <foreColor value="Red, HighIntensity" />
      </mapping>
      <mapping>
        <level value="WARN" />
        <foreColor value="Yellow" />
      </mapping>
      <mapping>
        <level value="INFO" />
        <foreColor value="Cyan" />
      </mapping>
      <mapping>
        <level value="DEBUG" />
        <foreColor value="Green" />
      </mapping>
      <threshold value="ALL"/>
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="ALL" />
        <levelMax value="FATAL" />
      </filter>
    </appender>

    <!--定义输出到windows事件中-->
    <appender name="EventLogAppender" type="log4net.Appender.EventLogAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%n%date >> %-5level thread: %thread, %message%newline" />
      </layout>
      <threshold value="ERROR"/>
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="ERROR" />
        <levelMax value="FATAL" />
      </filter>
    </appender>

    <!--定义输出到数据库中，这里举例输出到MySQL数据库中，数据库为：uihpacsdb-->
    <appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
      <reconnectonerror value="True" />
      <bufferSize value="10" />
      <connectionType value="MySql.Data.MySqlClient.MySqlConnection, MySql.Data, Version=6.4.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
      <connectionString value="data source=127.0.0.1;initial catalog=uihpacsdb;User ID=root;Password=uihpacs2012;persist security info=True;Connect Timeout=15;" />
      <commandText value="INSERT INTO pacs_log (Datetime,ThreadID,LogLevel,Logger,Message,LogException) VALUES (?log_date, ?thread, ?log_level, ?logger, ?message, ?exception)" />
      
      <!--分级输出-->
      <!--定义各个参数-->
      <parameter>
        <parameterName value="@log_date" />
        <dbType value="DateTime" />
        <layout type="log4net.Layout.RawTimeStampLayout"/>
      </parameter>
      <parameter>
        <parameterName value="@thread" />
        <dbType value="String" />
        <size value="255" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%thread" />
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@log_level" />
        <dbType value="String" />
        <size value="50" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%level" />
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@logger" />
        <dbType value="String" />
        <size value="255" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%logger" />
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@message" />
        <dbType value="String" />
        <size value="2000" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%message" />
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@exception" />
        <dbType value="String" />
        <size value="2000" />
        <layout type="log4net.Layout.ExceptionLayout" />
      </parameter>

      <threshold value="WARN"/>
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="WARN" />
        <levelMax value="FATAL" />
      </filter>

    </appender>

  </log4net>
</configuration> 

     

3. 代码中打印log

  log4net.LogManager.GetLogger("PIX").Error(ex.Message);