Question

I’m having some trouble getting log4net to work from ASP.NET 3.5. This is the first time I’ve tried to use log4net, I feel like I’m missing a piece of the puzzle.

My project references the log4net assembly, and as far as I can tell, it is being deployed successfully on my server.

My web.config contains the following:

  <configSections>     <section name='log4net'       type='log4net.Config.Log4NetConfigurationSectionHandler       , log4net'       requirePermission='false'/>   </configSections>    <log4net>     <appender name='InfoAppender' type='log4net.Appender.FileAppender'>       <file value='..\..\logs\\InfoLog.html' />       <appendToFile value='true' />       <layout type='log4net.Layout.PatternLayout'>         <conversionPattern           value='%d [%t] %-5p %c [%x] - %m%n' />       </layout>     </appender>     <logger name='_Default'>       <level value='INFO' />       <appender-ref ref='InfoAppender' />     </logger>   </log4net> 

I’m using the following code to test the logger:

using log4net; using log4net.Config;  public partial class _Default : System.Web.UI.Page {     private static readonly ILog log = LogManager.GetLogger('_Default');      protected void Page_Load(object sender, EventArgs e)     {         log.Info('Hello logging world!');     } } 

In my Global.asax, I’m doing the following:

void Application_Start(object sender, EventArgs e)  {     log4net.Config.XmlConfigurator.Configure(); } 

At this point, I can’t think of what else I might be doing wrong. The directory I’m trying to store the log in is writable, and even if I try different directories I get the same result: no file, no logs.

Any suggestions? 🙂

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Edit: I’ve tried several different formats for the path & name of the log file, some of which include ‘..\..\InfoLog.html’, ‘InfoLog.html’, ‘logs\InfoLog.html’, etc, just in case someone is wondering if that’s the problem.

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Edit: I’ve added the root logger node back into the log4net section, I ommitted that on accident when copying from the samples. The root logger node looks like this:

<root>   <level value='INFO' />   <appender-ref ref='InfoAppender' /> </root> 

Even with it, however, I’m still having no luck.

Answer 1

The root logger is mandatory I think. I suspect configuration is failing because the root doesn’t exist.

Another potential problem is that Configure isn’t being pointed to the Web.config.

Try Configure(Server.MapPath(‘~/web.config’)) instead.