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Dealing with Errors During Development


Of course good .NET programming practices have you nest your code within try/catch blocks, so you can still render pages even if there is some bad code within one of the web parts on the page, however, most articles I have seen reference pushing all errors to the Trace log.

This is all well and good in a production environment, but, in a development environment, I find it useful rather than to write errors to the Trace log, and having to dig through thousands of lines of messages (if you are not throttling events that is) in a text file (or using a third party tool – I’ve seen some on CodePlex), write event log entries to the system event log, and keep that open.

Writing events to the system event log is easy – just do the following in your code.

// we need to include the System.Diagnostics namespace
using System.Diagnostics;

// example try/catch block
try
{
// code here
}
catch (Exception ex)
{
    Trace.Write(ex);
    Trace.WriteLine(HttpContext.Current.Request.Url.ToString());
    EventLog.WriteEntry("Project List", ex.ToString(), EventLogEntryType.Warning, 2);
}

The 4 parameters passed above are

  • Source
    • String value containing the name of the source application
  • Message
    • String value containing the error message
  • Type (Error, FailureAudit, Information, SuccessAudit, Warning)
    • Must be specified by using EventLogEntryType
  • Event ID
    • Byte value representing an error code

Which will write an event, such as the example shown above to the Application event log.

image_2

More on the EventLog class can be found here: http://msdn.microsoft.com/en-us/library/system.diagnostics.eventlog(VS.80).aspx

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About Geoff Varosky
Geoff Varosky is a Senior Architect for BlueMetal Architects, based out of Watertown, MA. He has been architecting and developing web based applications his entire career, and has been working with SharePoint for the past 13 years. Geoff is an active member of the SharePoint community, Co-Founder and Co-Organizer of the Boston Area SharePoint Users Group, co-founder for the Boston Office 365 Users Group, co-organizer for SharePoint Saturday Boston and speaks regularly at SharePoint events and user groups.

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