Question

I’m trying to get a bare-bones example of logging going in my ASP.NET application. I would like to use the My.Log functionality to write out error log messages to a text log file. I have tried several things via Google but none of them seem to work. In general, when I use any of the properties of My.Log.DefaultFileWriter in the code it says ‘Object reference not set’.

My basic question is: What do I need in my web.config file (and/or anywhere else, if necessary) so that I can write messages with

My.Log.WriteEntry('blahblahblah') 

in my code, to a text file, D:\log.txt?

Thanks.

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Edit: specific code used:

    <system.diagnostics>     <sources >       <source name='DefaultSource' switchName='DefaultSwitch'>         <listeners>           <add name='FileLog'/>         </listeners>       </source>     </sources>     <sharedListeners>           <add name='FileLog'             type='Microsoft.VisualBasic.Logging.FileLogTraceListener, Microsoft.VisualBasic, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'                initializeData='FileLogWriter' />     </sharedListeners>     <switches>       <add name='DefaultSwitch' value='Verbose'/>     </switches>     <trace autoflush='true'></trace>   </system.diagnostics> 

Then in the code:

My.Log.DefaultFileLogWriter.CustomLocation = 'D:\' My.Log.DefaultFileLogWriter.BaseFileName = 'log' My.Log.WriteEntry('blahblahblah') 

(this would write to D:\log.log).

Answer 1

Walkthrough: Changing Where My.Application.Log Writes Information