Asp.NET log4net 的用法

用户可以从http://logging.apache.org/log4net/下载log4net的源代码。解压软件包后，在解压的src目录下将log4net.sln载入Visual Studio .NET，编译后可以得到log4net.dll。用户要在自己的程序里加入日志功能，只需将log4net.dll引入工程即可.
web.config 中的配置：
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
加到 <configSections> 里面.
<log4net debug="true">
      <appender name="LogFileAppender" type="log4net.Appender.FileAppender" >
          <param name="File" value="c:\Applog.txt" />
          <param name="datePattern" value="yyyy-MM-dd HH:mm" />
          <param name="AppendToFile" value="true" />
          <layout type="log4net.Layout.PatternLayout">
              <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n" />
          </layout>
      </appender>
    <appender name="HttpTraceAppender" type="log4net.Appender.ASPNetTraceAppender" >
        <layout type="log4net.Layout.PatternLayout">
            <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n" />
        </layout>
    </appender>
    <appender name="EventLogAppender" type="log4net.Appender.EventLogAppender" >
        <layout type="log4net.Layout.PatternLayout">
            <param name="ConversionPattern" value="%d [%t] %-