This post originated from an RSS feed registered with .NET Buzz by Raymond Lewallen. Original Post: Logging exceptions in your event log Feed Title: Raymond Lewallen Feed URL: /error.htm?aspxerrorpath=/blogs/raymond.lewallen/rss.aspx Feed Description: Patterns and Practices, OOP, .Net and Sql Latest .NET Buzz Posts Latest .NET Buzz Posts by Raymond Lewallen Latest Posts From Raymond Lewallen

I occasionally get asked for this, so I’m going to post it here for people to find.  This is how to put an exception from a .Net application into a custom log in the event viewer.

Let’s say you catch in exception in your code and you want to put it in the event logs.  It’s a piece of cake.

Public Shared Sub LogException(ByVal ErrorDescription As String)

        ' The name of our log in the event logs

        Dim Log As String = "AspNetError"

        ' Check to see if the log for AspNetError exists on the machine

        '    If not, create it

        If (Not EventLog.SourceExists(Log)) Then

            EventLog.CreateEventSource(Log, Log)

        End If

        ' Now insert your exception information into the AspNetError event log

        Dim logEntry As New EventLog

        logEntry.Source = Log

        logEntry.WriteEntry(ErrorDescription, EventLogEntryType.Error)

    End Sub

 Here is the C# code to do the same thing:

To test this, just creating the following code in a method somewhere:

try

{

            ThrowException();

}

catch (Exception exp)

{

            LogException(exp.ToString());

            throw;  // or whatever you want to do with it

}

 Where ThrowException does nothing but throws an exception

private void ThrowException()

{

            throw new Exception("Test");

}

 And you get a nice little entry into your event viewer (I ran it twice, that is why you see 2 entries):