Log4net不同版本在app.config和web.config的配置区别

app.config配置方法(Log4net v1.2.0 )

1,app.config中

<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
</configSections>

 <log4net>
<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
<span style="white-space:pre"></span>          <layout type="log4net.Layout.PatternLayout">
<span style="white-space:pre"></span>              <param name="ConversionPattern" value="%d [%t] - %m%n"/>
<span style="white-space:pre"></span>          </layout>
<span style="white-space:pre"></span>     </appender>
<logger name="debug">
<appender-ref ref="ConsoleAppender"/>
</logger>
</log4net>

2, AssemblyInfo.cs中添加

[assembly: log4net.Config.DOMConfigurator(ConfigFileExtension = "config", Watch = true)]3,定义变量和使用
private static ILog log = LogManager.GetLogger(typeof("类名")) log.Error("test");
 Web.config配置方法(Log4net v1.2.0 )
 1,web.config中(通app.config配置一样)

<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
</configSections>

<log4net>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="d:\Logs\InfoLog.txt" />
      <param name="AppendToFile" value="true" />
      <param name="MaxSizeRollBackups" value="100" />
      <param name="MaximumFileSize" value="1MB" />
      <param name="RollingStyle" value="Size" />
      <param name="StaticLogFileName" value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%-5p %d [%c] %m%n" />
      </layout>
    </appender>

    <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender" >
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%t]%-5p %c - %m%n"/>
      </layout>
    </appender>

    <root>
      <level value="DEBUG"/>
      <appender-ref ref="RollingLogFileAppender"/>
      <appender-ref ref="ConsoleAppender"/>
    </root>
  </log4net>

2, AssemblyInfo.cs中添加

[assembly: log4net.Config.DOMConfigurator(new System.IO.FileInfo(System.Web.HttpContext.Current.Server.MapPath("Web.Config ")))]

3,定义变量和使用(通app.config配置一样)

private static ILog log = LogManager.GetLogger(typeof("类名"))
log.Error("test");

可见v1.2.0配置比较麻烦 ，下面是v1.2.10的配置方法
 app.config配置方法(Log4net v1.2.10 )

1,app.config中(还是一样)

2, AssemblyInfo.cs中（可选）

[assembly: log4net.Config.XmlConfigurator(ConfigFileExtension = "config", Watch = true)]

3,定义变量和使用

static ILog log = LogManager.GetLogger("somename")
log4net.Config.XmlConfigurator.Configure(); --这个执行一次就可以.
log.Error("test");

注： 2步中的[assembly: log4net.Config.XmlConfigurator(ConfigFileExtension = "config", Watch = true)]
等效于 

  3步中的 log4net.Config.XmlConfigurator.Configure();

Web.config配置方法(Log4net v1.2.10 )

 1,web.config中(一样)
 2, AssemblyInfo.cs中 (这步没了)

3,定义变量和使用

static ILog log = LogManager.GetLogger("somename")
log4net.Config.XmlConfigurator.Configure(); --这个执行一次就可以.
log.Error("test");

显然v1.2.10引入的 XmlConfigurator增加了配置途径，使webapplication纪日志方便了。

经我测试v1.2.0并不能使用和普通webapplication 相同的配置方式支持wcf. 而v1.2.10新的配置方式使它对wcf依然支持。

 给各完整的config配置 

 <configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
</configSections>

<log4net>
<!-- Define some output appenders -->
<appender name="ProjectLogAppender" type="log4net.Appender.RollingFileAppender">
<param name="File" value="C:\\ServPMSLog\\SvrPlog.txt"/>
<param name="AppendToFile" value="true"/>
<param name="MaxSizeRollBackups" value="10"/>
<param name="MaximumFileSize" value="10000000"/>
<param name="RollingStyle" value="Size"/>
<param name="StaticLogFileName" value="true"/>
<layout type="log4net.Layout.PatternLayout">
<param name="Header" value="[Header]"/>
<param name="Footer" value="[Footer]"/>
<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n"/>
</layout>
</appender>

 <appender name="UserLogAppender" type="log4net.Appender.RollingFileAppender">
<param name="File" value="C:\\ServPMSLog\\SvrUlog.txt"/>
<param name="AppendToFile" value="true"/>
<param name="MaxSizeRollBackups" value="10"/>
<param name="MaximumFileSize" value="10000000"/>
<param name="RollingStyle" value="Size"/>
<param name="StaticLogFileName" value="true"/>
<layout type="log4net.Layout.PatternLayout">
<param name="Header" value="[Header]"/>
<param name="Footer" value="[Footer]"/>
<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n"/>
</layout>
</appender>

<!-- Setup the root category, add the appenders and set the default level -->
<root>
<level value="ERROR"/>
<appender-ref ref="ProjectLogAppender"/>
</root>

 <logger name="ProjectLog">
<appender-ref ref="ProjectLogAppender" />
</logger>

 <logger name="UserLog">
<appender-ref ref="UserLogAppender" />
</logger>
</log4net>
</configuration>