不使用log4net日志记录的Raygun

Question

我有一个简单的控制台应用程序。下载了log4net nuget包以及log4net射线枪nuget包：https://www.nuget.org/packages/log4net.Raygun/。我已经设置了我的应用程序来记录异常和信息信息，我确实在我的日志文件中得到了这些信息，但没有在射线枪仪表板中，也没有从raygun.io收到电子邮件。我做错了什么？

private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

private static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
{
    Log.Error(e);
}

private static void Main(string[] args)
{
    XmlConfigurator.Configure();

    // Unhandled exceptions
    AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
throw new Exception("test exception");

}

Web.Config：

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

  <log4net>
    <appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender">
      <file value="ErrorLog//ErrorLog.txt" />
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
      <appendToFile value="true" />
      <rollingStyle value="Size" />
      <maxSizeRollBackups value="2" />
      <maximumFileSize value="1MB" />
      <staticLogFileName value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d [%t] %-5p %c %m%n" />
      </layout>
    </appender>

    <appender name="RaygunAppender" type="log4net.Raygun.RaygunAppender, log4net.Raygun">
      <threshold value="DEBUG" />
      <apiKey value="MY SUPER AWESOME KEY HERE" />
      <!-- Attempt to send errors to raygun 15 times -->
      <retries value="15" />
      <!-- Wait 1 minute between retry attempts -->
      <timeBetweenRetries value="00:01:00" />
      <!-- Toggles whether to only send exceptions to raygun, or to also send messages logged to ERROR -->
      <onlySendExceptions value="false" />
      <!-- Optional filters for filtering exceptions and messages before sending to raygun -->
      <!--<exceptionFilter value="SomeOtherAssembly.SensitiveInformationMessageFilter, SomeOtherAssembly" />
      <renderedMessageFilter value="SomeOtherAssembly.SensitiveInformationMessageFilter, SomeOtherAssembly" />-->
    </appender>

    <root>
      <level value="ALL" />
      <appender-ref ref="LogFileAppender" />
      <appender-ref ref="RaygunAppender" />
    </root>
  </log4net>

    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="log4net" publicKeyToken="669e0ddf0bb1aa2a" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-1.2.13.0" newVersion="1.2.13.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

编辑:我添加了调试和“XmlConfigurator.Configure()”；这是我得到的(但是，在Raygun.io仪表板中仍然没有出现错误)：

...
log4net: RaygunAppender: Building Raygun message
log4net: RaygunAppender: Resolving application assembly
log4net: RaygunAppender: No exception object found in error, creating raygun error message from the rendered message and calling class
log4net: RaygunAppender: Sending Raygun message in a background task. Retries: '15', TimeBetweenRetries: '00:01:00'

Answer 1

您需要告诉log4net读取配置，在main方法中添加以下行：

log4net.Config.XmlConfigurator(Watch = true);

或者将以下属性放入您的assamblyinfo.cs中：

[assembly: log4net.Config.XmlConfigurator(Watch = true)]

如果这样做不起作用，您可以启用log4net内部调试来查看log4net内部代码中发生了什么：

<configuration>
...
    <appSettings>
        <add key="log4net.Internal.Debug" value="true"/>
    </appSettings>

...

    <system.diagnostics>
        <trace autoflush="true">
            <listeners>
                <add 
                    name="textWriterTraceListener" 
                    type="System.Diagnostics.TextWriterTraceListener" 
                    initializeData="C:\tmp\log4net.txt" />
            </listeners>
        </trace>
    </system.diagnostics>
</configuration>

Log4net常见问题

Answer 2

几个建议。您的CurrentDomain_UnhandledException处理程序将UnhandledExceptionEventArgs对象传递给log4net以记录事件，而不是将ExceptionObject传递给事件。对于log4net.Raygun处理异常，您可能需要如下所示：

private static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
{
    Log.Error(e.ExceptionObject);
}

另一个问题是，默认情况下，log4net.Raygun将在后台任务中将消息发送给雷炮。在您的简单控制台应用程序中，您的应用程序在后台任务完成之前正在退出和卸载，因此该消息从未实际发送。可以通过将以下设置添加到附录配置中来禁用后台发送错误：

<appender name="RaygunAppender" type="log4net.Raygun.RaygunAppender, log4net.Raygun">
...
    <sendInBackground value="false" />
...
</appender>