log4net使用

1添加log4net.config配置文件

<?xml version="1.0" encoding="utf-8" ?>

<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
  </configSections>
  <!--Log4net Begin by Tony  2008.11.20-->
  <log4net>

    <!--定义一个日志输出目的地-->
    <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
      <file value="G:\website\www.xftka.com\logs\" />
      <appendToFile value="true" />
      <!--按照日期进行变换日志文件-->
      <rollingStyle value="Date" />
      <datePattern value="yyyyMMdd'.txt'"/>
      <!--<lockingModel type="log4net.Appender.RollingFileAppender+MinimalLock" />-->
      <!--最小锁定模型以允许多个进程可以写入同一个文件-->
      <lockingModel  type="log4net.Appender.FileAppender+MinimalLock" />
      <!--保留的log文件数量 超过此数量后 自动删除之前的  -->
      <maxSizeRollBackups value="100" />
      <staticLogFileName value="false" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
    </appender>


    <!--输出到数据库-->
    <appender name="AdoNetAppender_SqlServer" type="log4net.Appender.AdoNetAppender">
      <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
      <connectionString value="Data Source=.sqlexpress;initial catalog=xft-shop;User ID=sa;Password=1"  providerName="System.Data.SqlClient"/>
      <commandText value="INSERT INTO xft_log_card ([Date],[Thread],[Level],[Logger],[Message]) VALUES (@log_date, @thread, @log_level, @logger, @message)"/>
      <parameter>
        <parameterName value="@log_date"/>
        <dbType value="DateTime"/>
        <layout type="log4net.Layout.PatternLayout" value="%date{yyyy'-'MM'-'dd HH':'mm':'ss'.'fff}"/>
      </parameter>
      <parameter>
        <parameterName value="@thread"/>
        <dbType value="String"/>
        <size value="255"/>
        <layout type="log4net.Layout.PatternLayout" value="%thread"/>
      </parameter>
      <parameter>
        <parameterName value="@log_level"/>
        <dbType value="String"/>
        <size value="50"/>
        <layout type="log4net.Layout.PatternLayout" value="%level"/>
      </parameter>
      <parameter>
        <parameterName value="@logger"/>
        <dbType value="String"/>
        <size value="255"/>
        <layout type="log4net.Layout.PatternLayout" value="%logger"/>
      </parameter>
      <parameter>
        <parameterName value="@message"/>
        <dbType value="String"/>
        <size value="4000"/>
        <layout type="log4net.Layout.PatternLayout" value="%message"/>
      </parameter>

    </appender>
    <root>
      <!--指定输出日志的等级-->
      <level value="ALL"/>
      <appender-ref ref="RollingFileAppender" />
      <appender-ref ref="RollingLogFileAppender" />
      <appender-ref ref="ConsoleAppender" />
      <appender-ref ref="AdoNetAppender_SqlServer" />
    </root>
  </log4net>
  <!--Log4net End-->
</configuration>

2 Global.asax.cs里

  readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
        protected void Application_Start()
        {
   System.IO.FileInfo fileinfo = new System.IO.FileInfo(Server.MapPath("~/log4net.config"));
            log4net.Config.XmlConfigurator.Configure(fileinfo);

            log.Info("网站启动......");
        }

可参考实例代码