mvc中使用log4net

新建一个log4net.config配置文件

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="log4net" type="System.Configuration.IgnoreSectionHandler"/>
  </configSections>
  <log4net>
    <!--定义输出到文件中-->
    <appender name="LogFileAppender" type="log4net.Appender.FileAppender">
      <!--定义文件存放位置-->
      <file value="D:/log4netfile.txt" />
      <appendToFile value="true" />
      <rollingStyle value="Date" />
      <datePattern value="yyyyMMdd-HH:mm:ss" />
      <layout type="log4net.Layout.PatternLayout">
        <!--每条日志末尾的文字说明-->
        <footer value="" />
        <!--输出格式-->
        <!--样例：2008-03-26 13:42:32,111 [10] INFO  Log4NetDemo.MainClass [(null)] - info-->
        <conversionPattern value="记录时间：%date 线程ID:[%thread] 日志级别：%-5level 出错类：%logger property:[%property{NDC}] - 错误描述：%message%newline" />
      </layout>
    </appender>
    <!--定义输出到控制台命令行中-->
    <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
    </appender>
    <!--定义输出到windows事件中-->
    <appender name="EventLogAppender" type="log4net.Appender.EventLogAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
    </appender>
    <!--定义输出到数据库中-->
    <appender name="ADONetAppender" 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=127.0.0.1;database=ADMS;user id=sa;password=ymj126"/>
      <commandText value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message],[Exception]) VALUES (@log_date, @thread, @log_level, @logger, @message, @exception)"/>
      <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="4000"/>
        <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>
    </appender>
    <!--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。-->
    <root>
      <level value="All" />
      <!--文件形式记录日志-->
      <appender-ref ref="LogFileAppender" />
      <!--控制台控制显示日志-->
      <!--<appender-ref ref="ConsoleAppender" />-->
      <!--Windows事件日志-->
      <!--<appender-ref ref="EventLogAppender" />-->
      <!-- 如果不启用相应的日志记录，可以通过这种方式注释掉
      <appender-ref ref="AdoNetAppender_Access" />
      -->
      <appender-ref ref="ADONetAppender" />
    </root>
    
    <!--过滤Nhibernate日志-->
    <logger name="NHibernate" additivity="false">
      <level value="OFF" />
      <appender-ref ref="LogFileAppender" />
      <appender-ref ref="ADONetAppender" />
    </logger>
    <logger name="NHibernate.SQL" additivity="false">
      <level value="OFF" />
      <appender-ref ref="LogFileAppender" />
      <appender-ref ref="ADONetAppender" />
    </logger>
  </log4net>
  <system.web>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />
  </system.web>

</configuration>

注意：因为我用Nhibernate框架所以加上NHibernate和NHibernate.SQL两个logger节点，目的是为了过滤Nhibernate的日志信息

在Application_Start()加

//初始化log4net
            log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo(Server.MapPath("~/log4net.config")));

自己写的类库方便调用

调用

Log4netHelper.Error(ex);