御用小本本

下載：log4net-binaries

丟到專案 bin\

web.config

<configuration>
  <configSections>
    <!-- 附加這行 -->
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
  </configSections>
  <!-- 附加下面區塊 -->
  <log4net>
    <appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
      <file value="logs\log.log" />
      <appendToFile value="true" />
      <maximumFileSize value="100KB" />
      <maxSizeRollBackups value="2" />
      <lockingmodel type="log4net.Appender.FileAppender+MinimalLock" />
      <datepattern value="'.'yyyy-MM-dd" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date | %-5level | %logger{1}.%method:%line | %message%newline" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelmin value="DEBUG" />
        <levelmax value="ERROR" />
      </filter>
    </appender>
    <root>
      <level value="DEBUG" />
      <appender-ref ref="RollingFile" />
    </root>
  </log4net>
  <!-- 主要就上面兩部分 -->
  <connectionStrings/>
  <appSettings/>
</configuration>

要用Log的class

// Import log4net classes.
using log4net;
using log4net.Config;

public class MyApp 
{
    // Define a static logger variable so that it references the
    // Logger instance named "MyApp".
    private static readonly ILog log = LogManager.GetLogger(typeof(MyApp));

    static void Main(string[] args) 
    {
        // Set up a xml configuration that logs.
        XmlConfigurator.Configure();

        log.Info("Entering application.");

        // do somethings...

        log.Info("Exiting application.");
    }
}

參照：Apache log4net™ Manual - Configuration

參照：[料理佳餚] 使用 log4net