Question

I’m working on a project with some custom Sharepoint Workflow components which I’d like to add log4net to.

I’m really struggling to get log4net to output anything at all though!

Here’s my current setup:

In the codebehind for my Workflow:

private ILog log;

public MessageQueueWorkflow()
{
    InitializeComponent();

    string filepath = ConfigurationManager.AppSettings["log4netConfigPath"];
    if (!string.IsNullOrEmpty(filepath))
    {
        log4net.Config.XmlConfigurator.ConfigureAndWatch(new FileInfo(filepath));
        log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
    }

}

public Guid workflowId = default(System.Guid);
public SPWorkflowActivationProperties workflowProperties = new SPWorkflowActivationProperties();

private void onWorkflowActivated1_Invoked(object sender, ExternalDataEventArgs e)
{
    try
    {
        #region Logging
        if (log.IsDebugEnabled)
        {
            log.Debug(System.Reflection.MethodInfo.GetCurrentMethod().Name);
        }
        #endregion Logging

        // do some stuff
    }
    catch (Exception ex)
    {
        if (log.IsErrorEnabled)
        {
            log.Error("An error has occurred.", ex);
        }

        throw ex;
    }
}

In my web.config for the Sharepoint site:

<appSettings>
    <add key="log4netConfigPath" value="C:\Inetpub\wwwroot\wss\VirtualDirectories\80\log4net.config"/>
</appSettings>

In my log4net.config file:

<log4net debug="true">
  <appender name="EventLogAppender" type="log4net.Appender.EventLogAppender" >
    <applicationName value="MyApp" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%d %-5p %c - %m%n" />
    </layout>
  </appender>
</log4net>

Now, when I run this workflow, I’d expect to see some debug entries showing up in the EventViewer, but I’m getting nothing.

Any ideas what I’m doing wrong?

Thanks!

Answer 1

You need to configure at least one logger. Usually you would configure the root logger. E.g.:

<log4net>
   ...
   <root>
       <level value="ALL" />
      <appender-ref ref="EventLogAppender" />     
   </root>
</log4net>

If this is not making it work yet, the I recommend that you configure a trace listener that will output the log4net internal debugging messages. (You already have internal debugging turned on.)