log4net 按时间输出日志

<?xml version="1.0"?>
<configuration>
  
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>

  <log4net>
    <root><!-- 根logger，所有其它logger都默认继承它-->   
      <level value="WARN" /><!-- 只有在这个级别或之上的事件才会被记录--> 
      <appender-ref ref="LogFileAppender" /><!--要引用的appender的名字-->
      <appender-ref ref="ConsoleAppender" />
    </root>
    
    <logger name="testApp.Logging">
      <level value="DEBUG"/>
    </logger>
    <!--定义日志的输出方式-->
    <appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender" >
      <param name="File" value="Log\\" />
      <param name="AppendToFile" value="true" />
      
      <param name="RollingStyle" value="Date" />
      <datePattern value="yyyyMMdd" />
      <param name="DatePattern" value="yyyyMMdd\\yyyyMMdd‘_logtest.log‘" />
      <param name="StaticLogFileName" value="false" />
      <RollingStyle value="Date" />
      
      <layout type="log4net.Layout.PatternLayout"><!--定义appender使用的输出格式-->
        <param name="Header" value="[Header] "/>
        <param name="Footer" value="[Footer] "/>
        <param name="ConversionPattern" value="%d [%t] %-5p %c [%x]  - %m%n" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter"><!--定义此app使用的过滤器-->
        <param name="LevelMin" value="DEBUG" />
        <param name="LevelMax" value="WARN" />
      </filter>
    </appender>
    
    <appender name="ConsoleAppender"  type="log4net.Appender.ConsoleAppender" >
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern"  value="%d [%t] %-5p %c [%x] - %m%n" />
      </layout>
    </appender>
    
  </log4net>
  
<startup>
  <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>
  
</configuration>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Log4Net.console
{
    class Program
    {
        static void Main(string[] args)
        {
            log4net.Config.XmlConfigurator.Configure();
            log4net.ILog log = log4net.LogManager.GetLogger("testApp.Logging");//获取一个日志记录器
            log.Info(DateTime.Now.ToString() + ": login success");//写入一条新log
            Console.ReadLine();
        }
    }
}