Event Log Trace Listener

[danyeungw]

The following code ran but I didn't find the Event Log named EventLog. Is EventLog supposed to be created with the Dim statement and the text "Write something to the EventLog" supposed to be written to EventLog? I am using VB.NET 2.0 here.

Dim objListener As New EventLogTraceListener("EventLog")
Trace.Listeners.Add(objListener)
Trace.WriteLine("Write something to the EventLog")

Thanks.
DanYeung

 

[JohnH]

No, the string overload constructor specifies an existing log. Use Eventlog class to create a new log and use an instance of the configured Eventlog class as input parameter to the EventLogTraceListener. See the code added, I copied it from the Eventlog class documentation:

If Not EventLog.SourceExists("MySource") Then
  EventLog.CreateEventSource("MySource", "MyNewLog")
End If
Dim myLog As New EventLog()
myLog.Source = "MySource"
 
Dim objListener As New EventLogTraceListener(myLog)
Trace.Listeners.Add(objListener)
Trace.WriteLine("Write something to the EventLog")

 

[danyeungw]

Thanks. Is MySource the event log file name? What is MyNewLog? Thanks again.

DanYeung

 

[JohnH]

"MyNewLog" is the event log file name, "MySource" is the logging source. Try it out, read the documentation, hover with mouse over code to see descriptions of what everything is - not necessarily in that order, but the information is literally at your fingertips. Did you know you can select a word in code (mouse doubleclick it) then click F1 button to bring up relevant help? By the way, here is the EventLog class documentation online, the page from where I mentioned I copied the code, you should read it to know what logs and sources are appropriate for you in different situations: http://msdn2.microsoft.com/en-us/library/system.diagnostics.eventlog.aspx There are further details about Source in the Property page.

 

[danyeungw]

Thanks for you patients. I find it is a little more difficult to understand Microsoft's documents than other sites'. The code ran and the event log was created, but I couldn't locate it. I did a search in the entire c:\ drive. I haven't found one site that tells where the event log is located.

DanYeung

 

[JohnH]

If you're (like 75% others) on XP, it's in Control Panel > Administrative Tools > Event Viewer.
There is also a Administrative Tools folder with the same content somewhere in Start Menu Programs.
I think it's pretty much same with Win2000.

 

[danyeungw]

I used XP Professional. I didn't find the event log I created with the code. I wanted to check if the content is correct. Thanks.

DanYeung