Writing messages to Application Event Log

Question

I am running into an issue writing events to the Windows Event Log. I have looked through the posts and I think I am doing it correctly, but I still get the following error in the event viewer:

the message resource is present but the message is not found in the string/message table

Does anyone have any ideas on what I am missing?

I am having the event source created in the WIX installer:

<Fragment>
    <PropertyRef Id="NETFRAMEWORK35"/>
    <PropertyRef Id="NETFRAMEWORK20"/>
    <PropertyRef Id="NETFRAMEWORK20INSTALLROOTDIR"/>
    <PropertyRef Id="NETFRAMEWORK20INSTALLROOTDIR64" />

    <Component Id='EventSource'
               Directory='INSTALLDIR'
               Guid='F382AAC5-F7C5-46A4-95CF-EA7724DXXXXX' >
        <Condition>ALLUSERS</Condition>
        <?if $(var.Platform) = x64 ?>
            <util:EventSource Log='Application'
                    Name='MySource'
                    EventMessageFile='[NETFRAMEWORK20INSTALLROOTDIR64]EventLogMessages.dll'
                    KeyPath='yes' />
        <?else ?>
            <util:EventSource Log='Application'
                    Name='MySource'
                    EventMessageFile='[NETFRAMEWORK20INSTALLROOTDIR]EventLogMessages.dll'
                    KeyPath='yes' />
        <?endif ?>
    </Component>
</Fragment>

And here is my C# code where I write to the Event Log:

public class Log
{
    private const string EventSource = "MySource";
    private const string EventLog = "Application";
    private static EventLog _logger = null;

    private static void InitLogger()
    {
        if (!System.Diagnostics.EventLog.SourceExists(EventSource))
        {
            System.Diagnostics.EventLog.CreateEventSource(EventSource, EventLog);
        }
        _logger = new EventLog() { Source = EventSource, Log = EventLog };
    }

    public static void Write(EventLogEntryType entryType, string format, params object[] args)
    {
        string entry = _Format(format, args);

        try
        {
            if (_logger == null)
                InitLogger();
            _logger.WriteEntry(entry, entryType, 1);
        }
        catch (Exception ex)
        {
            Tracer.Misc.Error("Could not write to event log: {0}", entry);
        }

    }

    private static string _Format(string format, object[] args)
    {
        if ((args == null) || (args.Length == 0))
            return format;

        try
        {
            return String.Format(format, args);
        }
        catch (Exception e)
        {
            return format + " [Format Exception:" + e.Message + "]";
        }
    }
}

Answer 1

I figured out my issue. The code I have is fine. The problem is with the name of the EventSource I was using. The event source contained spaces and dashes. When I removed those it worked.

I.E. going from 'My Event-Source' to 'MyEventSource'