asp.net – Log4net可以有多个appender写入同一个文件？

您需要在每个Appender中放置以下行：

<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />

这将使log4net使用最小的锁定模型，允许多个进程写入同一个文件。

以下是使用两个追加器写入同一个日志文件的示例XML：

<log4net debug="false">
<appender name="RollingLogFileAppender1" type="log4net.Appender.RollingFileAppender">
  <!-- this configures a log for the application messages -->
  <file value="TestLog.log" />
  <appendToFile value="true" />
  <!-- next line uses a minimal locking model that allows multiple processes to write to the same file -->
  <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
  <rollingStyle value="Size" />
  <maxSizeRollBackups value="10" />
  <maximumFileSize value="10MB" />
  <staticLogFileName value="true" />
  <!-- make the most recent log the highest numbered log -->
  <countDirection value="1" />
  <layout type="log4net.Layout.PatternLayout">
    <conversionPattern value="%-5level %date{MM-dd-yyyy HH:mm:ss.ff} [%property{NDC}] %message%newline [Thread: %thread] %c{1} Method:%method(%file{1},Line:%line) %newline" />
  </layout>
  <!-- The following two filters insure only log requests of 
        version '1' use this Appender -->
</appender>
<appender name="RollingLogFileAppender2" type="log4net.Appender.RollingFileAppender">
  <file value="TestLog.log" />
  <appendToFile value="true" />
  <!-- next line uses a minimal locking model that allows multiple processes to write to the same file -->
  <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
  <rollingStyle value="Size" />
  <maxSizeRollBackups value="10" />
  <maximumFileSize value="10MB" />
  <staticLogFileName value="true" />
  <!-- make the most recent log the highest numbered log -->
  <countDirection value="1" />
  <layout type="log4net.Layout.PatternLayout">
    <conversionPattern value="%-5level %date{MM-dd-yyyy HH:mm:ss.ff} [%property{NDC}] [Thread: %thread] %c{1} Method:%method(%file{1},Line:%line) %newline%message" />
  </layout>
</appender>
<root>
  <level value="DEBUG" />
  <appender-ref ref="RollingLogFileAppender1" />
  <appender-ref ref="RollingLogFileAppender2" />
</root>

这可以在这里的Apache文档中找到：
Apache Log4Net Docs
只需在此页面上搜索“同一文件”即可。

希望这可以帮助。