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Asked: 2026-05-11T05:12:05+00:00

By default, ASP.NET records all uncaught exceptions to system Event Log. I’m aware of

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By default, ASP.NET records all uncaught exceptions to system Event Log. I’m aware of the fact that one should have a proper logging facility in place, but this is better than nothing and it serves well as a temporary solution.

I would like to be able to filter efficiently the events in the log. I learned that, when logging programmatically, you can set a custom value for the Source column in the event log via:

EventLog eventLog = new EventLog('Application'); eventLog.Source = 'My custom name'; eventLog.WriteEntry('Some error description ...', EventLogEntryType.Error);

However, ASP.NET sets this value to ‘ASP.NET’ followed by its version. I briefly checked the documentation of web.config, but did not find an obvious place to change it. I wonder if it can be changed at all.

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  1. Your best bet is to use the source property as intended, but use an installer class in your installer to set up the registry at install time (under Admin), eg.:

     using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Configuration.Install; using System.Diagnostics;  namespace InstallerClasses {     [RunInstaller(true)]     public partial class EventLog : Installer     {         private EventLogInstaller eventLogInstaller;          ///          /// Creates the event log for MyApp         ///          public EventLog()         {             InitializeComponent();              // Create an instance of an EventLogInstaller.             eventLogInstaller = new EventLogInstaller();              // Set the source name of the event log.             eventLogInstaller.Source = 'MySource';              // Set the event log that the source writes entries to.             eventLogInstaller.Log = 'Application';              // Add myEventLogInstaller to the Installer collection.             Installers.Add(eventLogInstaller);         }     } }

    And make sure it gets run as a Custom Action in your installer.

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