How to write entries to Windows Event Viewer by log4net in WPF?

Question

I have read this article. and this answer1SO, answer2SO, answer3SO.

What I've done so far:

1. Declared in the last line of AssemblyInfo.cs :

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

2. Written in app.config

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

  <log4net>
    <appender name="EventLogAppender" type="log4net.Appender.EventLogAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline"/>
      </layout>
    </appender>
    <root>
      <level value="ALL"/>
      <appender-ref ref="EventLogAppender"/>
    </root>
  </log4net>
</configuration>

3. What I've written in my handler:

private void btn_Click(object sender, RoutedEventArgs e)
{
   XmlConfigurator.Configure();       
   ILog Log = 
   LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
   Log.Fatal("The exception occurred", new Exception("Hello World of event log")); 
}`

After all these three implemented actions, I have no entries in my Window Event Viewer. Please, see my Window Event Viewer:

score 1 · Accepted Answer · answered Jan 29 '16 at 21:01

1

Your app needs to run once as Administrator to create the event source that the logs will be assigned to: see "Why doesn't the EventLogAppender work?" in the log4net documentation.

answered Jan 29 '16 at 21:01

stuartd

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Thanks! I am an administrator at my PC, but I'll try on Monday to run my program with administrative privileges. – StepUp Jan 29 '16 at 22:45
@StepUp you need to use "Run as Administrator" explictly, rather than just as a user in the admin group – stuartd Jan 29 '16 at 22:48
that is action of simple users cannot be logged to Window Event Viewer? actions of not administrators could not be logged to Windows Event Viewer? – StepUp Jan 29 '16 at 23:04
No, it's _creating the event source_ that needs to be done by 'administrator' - after that, users can write to the event log using that event source. – stuartd Jan 29 '16 at 23:36
So is it possible to write to event viewer without running "Run as Administrator"? – StepUp Jan 30 '16 at 10:45
Yes it is, as long as the event source exists – stuartd Jan 30 '16 at 14:43
consequently, the first run of program at new PC must be run always as "Run as Administrator?" – StepUp Jan 30 '16 at 17:13
Or you can add ithe event source as part of your installation program. – stuartd Jan 30 '16 at 18:09
How can I do it? Maybe you have a link? – StepUp Jan 30 '16 at 18:11
Do you already have an installer? How are you distributing the program? – stuartd Jan 30 '16 at 22:41
using Windows Setup Project. – StepUp Jan 30 '16 at 22:45
man, you are magic!:) Could not upvote more than one time!:) Thanks!:) – StepUp Feb 01 '16 at 07:52

How to write entries to Windows Event Viewer by log4net in WPF?

1 Answers1