简要的Log4Net 应用配置

只是记录不描述。 详细看官方网站。

Winform

 <section name="log4net" type="System.Configuration.IgnoreSectionHandler"/>

Web

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

 <log4net>
    <appender name="FileAppender" type="log4net.Appender.RollingFileAppender">
      <file value="log/Log.txt" />
      <appendToFile value="true" />
      <rollingStyle value="Date" />
      <datePattern value="yyyyMMdd&quot;.txt&quot;" />
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />

      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger - %message%n" />
      </layout>
    </appender>
    <root>
      <level value="INFO" />
      <appender-ref ref="FileAppender" />
    </root>
  </log4net>

在Namespace的上方写一个，那个Dll 需要就要往那个dll加。

Winform or Dll 需要加入下面一项，一般加入Assembly.cs

[assembly: XmlConfigurator(Watch = true)]
namespace namespace
{

}

LOG Level

OFF>FATAL > ERROR > WARN > INFO > DEBUG > ALL

不锁死文件：<lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> 

变量集合

%newline%

Filter

在appender里面的filter，我一般用于分离输出的，如Error Fatal一个文件，INFO WARN一个文件之类的。

下面这个是只输出 WARN 和 INFO信息。 最后一个的DenyAllFilter 是必须的。Value不区分大小写，很有Microsoft的风格。

<filter type="log4net.Filter.LevelMatchFilter">
       <param name="LevelToMatch" value="WARN" />
</filter>

<filter type="log4net.Filter.LevelMatchFilter"> 
      <param name="LevelToMatch" value="INFO" /> 
</filter>

<filter type="log4net.Filter.DenyAllFilter" />

通过编程方式动态改变Level

  private void SetLogingLevel(string strLogLevel)
        {
            string strChecker = "WARN_INFO_DEBUG_ERROR_FATAL";
            if (String.IsNullOrEmpty(strLogLevel) == true || strChecker.Contains(strLogLevel) == false)
                throw new Exception(" The strLogLevel should be set to WARN , INFO , DEBUG ,");

            log4net.Repository.ILoggerRepository[] repositories = log4net.LogManager.GetAllRepositories();
            //Configure all loggers to be at the debug level. 
            foreach (log4net.Repository.ILoggerRepository repository in repositories)
            {
                repository.Threshold = repository.LevelMap[strLogLevel];
                log4net.Repository.Hierarchy.Hierarchy hier = (log4net.Repository.Hierarchy.Hierarchy)repository;
                log4net.Core.ILogger[] loggers = hier.GetCurrentLoggers();
                foreach (log4net.Core.ILogger logger in loggers)
                {
                    ((log4net.Repository.Hierarchy.Logger)logger).Level = hier.LevelMap[strLogLevel];
                }
            }
            //Configure the root logger. 
            log4net.Repository.Hierarchy.Hierarchy h = (log4net.Repository.Hierarchy.Hierarchy)log4net.LogManager.GetRepository();
            log4net.Repository.Hierarchy.Logger rootLogger = h.Root;
            rootLogger.Level = h.LevelMap[strLogLevel];
        }