第一步，配置文件名： log4net.config
第二步，在AssemblyInfo.cs中添加 [assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]
第三步：表现层应用
log4net.ILog logger = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
protected void Page_Load(object sender, EventArgs e)
{
logger.Info("dfadfa");
}
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<log4net>
<!--写到sqlserver的配置：-->
<appender name="ADONetAppender_SqlServer" type="log4net.Appender.AdoNetAppender">
<!--<bufferSize value="10" />-->
<connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
<connectionString value="Server=192.168.10.9;UID=sa;PWD=111111;DataBase=Test;Max Pool Size=1000"/>
<commandText value="INSERT INTO Log ([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">
<conversionPattern value="%date{yyyy'-'MM'-'dd HH':'mm':'ss'.'fff}" />
</layout>
-->
<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="4000"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%message"/>
</layout>
</parameter>
</appender>
<!--写到access配置：-->
<!--<appender name="AdoNetAppender_Access" type="log4net.Appender.AdoNetAppender">
<bufferSize value="1" />
<connectionString value="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\\log4net.mdb;User Id=;Password=;" />
<commandText value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message]) VALUES (@log_date, @thread, @log_level, @logger, @message)" />
<parameter>
<parameterName value="@log_date" />
<dbType value="String" />
<size value="255" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date" />
</layout>
</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="1024" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%message" />
</layout>
</parameter>
</appender>
<appender name="ColoredConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
<mapping>
<level value="ALL" />
<foreColor value="White" />
<backColor value="Red, HighIntensity" />
</mapping>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>-->
<!--写入到文件,是累加，不生成新的文件-->
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<!--日志写入路径-->
<file value="log\log-file.txt" />
<!--overwritten/appended to default =true 默认是追加-->
<appendToFile value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<!--写入到操作系统-->
<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender">
<ApplicationName value="msg"></ApplicationName>
<LogName value="测试"></LogName>
<MachineName value="zhangqi"></MachineName>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline"/>
</layout>
</appender>
<!--写入到文件-->
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<!--<file value="log\log.txt"/>-->
<!--<file name="Client.Logging" value="log\log" />-->
<file value="log\log" />
<!--是否覆盖，默认是追加true-->
<appendToFile value="true"/>
<DatePattern value="yyyyMMdd ".txt""></DatePattern>
<!--设置无限备份=-1 ，最大备份数为1000-->
<maxSizeRollBackups value="1000"/>
<!--每个文件的最大20k-->
<maximumFileSize value="20"/>
<!--名称是否可以更改为false为可以更改-->
<param name="StaticLogFileName" value="false" />
<!--文件名称-->
<!--<param name="DatePattern" value="yyyyMMdd".txt"" />-->
<param name="RollingStyle" value="Composite" />
<!--<param name="RollingStyle" value="Composite" />-->
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d [%r] [%t] %-5p %c - %m%n%n" />
</layout>
</appender>
<!--写入到文件,是累加，不生成新的文件-->
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<!--日志写入路径-->
<file value="log\log-file.txt" />
<!--overwritten/appended to default =true 默认是追加-->
<appendToFile value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<root>
<level value="ALL"/>
<appender-ref ref="ADONetAppender_SqlServer"/>
<appender-ref ref="RollingLogFileAppender"/>
<appender-ref ref="EventLogAppender"></appender-ref>
<appender-ref ref="AdoNetAppender_Access"></appender-ref>
<appender-ref ref="ColoredConsoleAppender"></appender-ref>
<appender-ref ref="FileAppender"></appender-ref>
</root>
<logger name="ConsoleApp.LoggingExample">
--><!--<appender-ref ref="B" />--><!--
<level value="All"/>
<appender-ref ref="ADONetAppender_SqlServer"/>
<appender-ref ref="RollingLogFileAppender"/>
</logger>
<logger name="LoggingExample">
--><!--<appender-ref ref="B" />--><!--
<level v