2.5 Error Handling

(from http://fonet.codeplex.com/wikipage?title=Section%205%3a%20Error%20Handling&referringTitle=Getting%20Started)

Error Handling

During the rendering process FO.NET may throw 3 types of event. The events are listed below in order of severity.

Info
Warning
Error 

By default the Info and Warning events are written to standard output, whereas the Error event will generate a System.SystemException.

You may override this default behaviour by subscribing to any of the events via the FonetDriver class. Some examples are shown below

Code Fragment - Log the Info event to disk

void Example()
{
	FonetDriver driver = FonetDriver.Make();
	driver.OnInfo += new FonetDriver.FonetEventHandler(FonetInfo);
	// ...
}

public void FonetInfo(object Driver, FonetEventArgs e)
{
	// Log message to disk
	logTextWriter.WriteLine("[INFO] " + e.GetMessage());
}

Code Fragment - Log to Windows Event Service

void Example()
{
	FonetDriver driver = FonetDriver.Make();
	driver.OnError += new FonetDriver.FonetEventHandler(FonetError);
	// ...
}

public void FonetError(object Driver, FonetEventArgs e)
{
	// Log to Windows Event Service

	const string LogName = "Fonet";
	if (!EventLog.SourceExists(LogName)) {
		EventLog.CreateEventSource(LogName, LogName);
	}

	// Insert into Event Log
	EventLog Log = new EventLog();
	Log.Source = LogName;
	Log.WriteEntry(e.GetMessage(), EventLogEntryType.Error);
}

Last edited Jan 31, 2009 at 1:16 PM by griffm, version 2