How to remove and create log in Windows Event Viewer

Question

I have an app. I'm trying to write log in Windows Event Viewer when its crashing. I found Write to Windows Application Event Log and I'm using DispatcherUnhandledExceptionEventHandler for catching unhandled exception. I'm setting it in constructor of app like:

 DispatcherUnhandledException += MyApplication_DispatcherUnhandledException;

and write log like this:

using (EventLog eventLog = new EventLog("Application"))
        {
            eventLog.Source = "Application";
            eventLog.WriteEntry(exceptionMessage, EventLogEntryType.Error);
        }

Log creates, but in Run method of System.Windows.Application occurs another exception and windows adds this error in Event Viewer with another Id, source....

Description: The process was terminated due to an unhandled exception.

Exception Info: System.Exception at ServerApp.MainWindow..ctor()

Exception Info: System.Windows.Markup.XamlParseException at System.Windows.Markup.WpfXamlLoader.Load(System.Xaml.XamlReader, System.Xaml.IXamlObjectWriterFactory, Boolean, System.Object, System.Xaml.XamlObjectWriterSettings, System.Uri) at System.Windows.Markup.WpfXamlLoader.LoadBaml(System.Xaml.XamlReader, Boolean, System.Object, System.Xaml.Permissions.XamlAccessLevel, System.Uri) at System.Windows.Markup.XamlReader.LoadBaml(System.IO.Stream, System.Windows.Markup.ParserContext, System.Object, Boolean) at System.Windows.Application.LoadBamlStreamWithSyncInfo(System.IO.Stream, System.Windows.Markup.ParserContext) at System.Windows.Application.LoadComponent(System.Uri, Boolean) at System.Windows.Application.DoStartup()

How can I write only my log in event viewer?

looks like your event handler is not handling that exception. could it be that this exception is thrown before the handler for the unhandled exceptions is added? — Cee McSharpface
– Cee McSharpface, Commented Dec 10, 2018 at 14:25
Try commenting out that using block. It looks to me as if you have an unhandled exception. — spodger
– spodger, Commented Dec 10, 2018 at 14:31

fluidguid · Accepted Answer · 2018-12-10 14:30:55Z

4

using System;
using System.Diagnostics;

...
...

public void WriteToEventLog(EventLogEntryType eventLogType, string message, string logSourceName)
{
    if (!EventLog.SourceExists(logSourceName))
    {
        EventLog.CreateEventSource(logSourceName, "Application");
    }
    using (var eventLog = new EventLog { Source = logSourceName })
    {
        const int maxLength = 31000;
        if (message.Length > maxLength)
        {
            message = message.Substring(0, maxLength);
        }
        eventLog.WriteEntry(message, eventLogType);
    }
}

The user, under which account this app is going to run, needs to have access to be able to create logs.

Good luck.

answered Dec 10, 2018 at 14:30

fluidguid

1,7011 gold badge16 silver badges26 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Micah Armantrout · Accepted Answer · 2018-12-10 14:31:40Z

0

I would put a try catch around the whole process and then write the exception to a file see:

how to save exception in txt file?

You don't have to always write to the file but just to understand what is really going on

answered Dec 10, 2018 at 14:31

Micah Armantrout

7,0476 gold badges42 silver badges73 bronze badges

Collectives™ on Stack Overflow

How to remove and create log in Windows Event Viewer

2 Answers 2

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related