<log4net>
  <root>
    <level value="INFO" />
    <appender-ref ref="RollingFileAppender" />
    <appender-ref ref="ColoredConsoleAppender" />
  </root>
  <logger name="MessageHandler">
    <level value="ERROR" />
    <appender-ref ref="SmtpAppender" />
  </logger>
  <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
    <file value="Log\pamsdc" />
    <threshold value="INFO" />
    <appendToFile value="true" />
    <rollingStyle value="Composite" />
    <datePattern value="yyyyMMdd" />
    <maxSizeRollBackups value="100"></maxSizeRollBackups>
    <layout type="log4net.Layout.PatternLayout">
      <header value="[Header]" />
      <footer value="[Footer]" />
      <conversionPattern value="%date [%thread] %-5level %logger [%ndc] <%property{auth}> - %message%newline" />
    </layout>
  </appender>
  <appender name="ColoredConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
    <mapping>
      <level value="WARN" />
      <foreColor value="White" />
      <backColor value="Red, HighIntensity" />
    </mapping>
    <layout type="log4net.Layout.PatternLayout">
      <header value="[Header]" />
      <footer value="[Footer]" />
      <conversionPattern value="%date [%thread] %-5level %logger [%ndc] <%property{auth}> - %message%newline" />
    </layout>
  </appender>
  <appender name="SmtpAppender" type="log4net.Appender.SmtpAppender,log4net">
    <to value="" />
    <from value="GPEHZ-MIS@GoldPeak" />
    <subject value="PAMS DC 致命錯誤" />
    <smtpHost value="192.50.6.248" />
    <bufferSize value="32" />
    <lossy value="true" />
    <Authentication value="Basic"/>
    <Username value="GPEHZ-MIS@GoldPeak"/>
    <Password value=""/>
    <evaluator type="log4net.Core.LevelEvaluator,log4net">
      <threshold value="ERROR" />
    </evaluator>
    <layout type="log4net.Layout.PatternLayout,log4net">
      <conversionPattern value="日期：%date 線程：[%thread] 級別： %-5level 類：%logger [%ndc] < %property{auth}> - 消息：%message%newline" />
    </layout>
  </appender>
</log4net>

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net"  type="log4net.Config.Log4NetConfigurationSectionHandler,
            log4net-net-1.0" />
  </configSections>

  <log4net>
    ..
  </log4net>
</configuration>

log4net.ILog log = log4net.LogManager.GetLogger("logger-name");

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]//關(guān)聯(lián)log4net.config文件
//或者
[assembly: log4net.Config.XmlConfigurator(ConfigFileExtension = "log4net", Watch = true)]//關(guān)鍵到xxx.exe.log4net或xxx.dll.log4net,并監(jiān)測變化。

log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo("log4net.config"));
//或者
log4net.Config.XmlConfigurator.ConfigureAndWatch（new FileInfo(Server.MapPath(@”Config.log4net.config”))）

Log4net.ILog log = Log4net.LogManager.GetLogger("MyLogger"); 
//或
Log4net.ILog log = Log4net.LogManager.GetLogger(typeof(_Default));
//或
Log4net.ILog log = Log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

if (log.IsDebugEnabled)
    log.Debug("message"); 
if (log.IsInfoEnabled) 
   log.Info("message); 

log.Logger.Repostory.Shutdown()//關(guān)閉日志

log4net.Repository.Hierarchy.Hierarchy h = (log4net.Repository.Hierarchy.Hierarchy)log4net.LogManager.GetRepository();
log4net.Appender.AppenderCollection ac = h.Root.Appenders;

log4net.ILog logger = log4net.LogManager.GetLogger(typeof(_Defaut));
log4net.Appender.AppenderCollection ac = ((log4net.Repository.Hierarchy.Logger)logger.Logger).Appenders;

for (int i = 0; i < ac.Count; i++)
{
    log4net.Appender.RollingFileAppender rfa = ac[i] as log4net.Appender.RollingFileAppender;
    if (rfa != null)
    {
        rfa.File = "xxx.log";//程序運行時動態(tài)的設(shè)定log日志的文件名
        rfa.Writer = new System.IO.StreamWriter(rfa.File, rfa.AppendToFile, rfa.Encoding);
    }
 }

public class MyMemAppender : AppenderSkeleton
{
    private ArrayList eventQueue;

    public string RemoteAddress { get; set; }
    public int QueueSize { get; set; }

    public MyMemAppender() : base()
    {
        eventQueue = new ArrayList();
    }

    protected override void Append(log4net.Core.LoggingEvent loggingEvent)
    {
        lock (eventQueue.SyncRoot)
        {
            eventQueue.Add(loggingEvent);
            if (eventQueue.Count >= QueueSize)
            {
                lock (eventQueue.SyncRoot)
                {
                    SaveToServer();
                    eventQueue.Clear();
                }
            }
        }
    }

    private void SaveToServer()
    {
        lock (eventQueue.SyncRoot)
        {
            List logList = new List();
            foreach (log4net.Core.LoggingEvent evt in eventQueue)
            {
                try
                {
                    LogModel m = Newtonsoft.Json.JsonConvert.DeserializeObject(evt.RenderedMessage);//或者evt.MessageObject as LogModel
                    logList.Add(m);
                }
                catch (Exception ex)
                {
                    Console.Write(ex.ToString());
                    continue;
                }
            }
            //將logList序列化上傳至remoteAddress
        }
    }

    virtual public LoggingEvent[] GetEvents()
    {
        lock (eventQueue.SyncRoot)
        {
            return (LoggingEvent[])eventQueue.ToArray(typeof(LoggingEvent));
        }
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<log4net debug="true">
<appender name="myMemAppender" type="LogSystem.Common.MyMemAppender">
    <param name="QueueSize" value="10"/>
    <param name="RemoteAddress" value="http://localhost/PostLogData.aspx"/>
</appender>
<root>
   <level value="ALL"/>
   <appender-ref ref="myMemAppender" />
</root>
</log4net>

MyMemAppender appender = new MyMemAppender();
appender.QueueSize = 5;
appender.RemoteAddress = "http://localhost:57427/PostLogData.aspx";
log4net.Config.BasicConfigurator.Configure(appender);
ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

MyMemAppender appender = new MyMemAppender();
appender.Name = "MyMemAppender";
appender.QueueSize = 5;
appender.RemoteAddress = "http://localhost:57427/PostLogData.aspx";

Logger logger1 = (Logger)LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
logger1.Level = Level.Info;
IAppender appendered = logger1.GetAppender("MyMemAppender");
if (appendered != null) logger1.RemoveAppender("MyMemAppender");
logger1.AddAppender(appendered);
appender.ActivateOptions();