kdheath.Logging.Helper 2.0.6

About

The Logging.Helper package is a light-weight platform for .NET with rich log routing and management capabilities provided by NLog.

See Change Log for all release notes.

Key Features

• Supports .NET Framework, .NET Core, and .NET 5.0+
• By default, logging will only be output to the console window.

Main Types

• Logger - Class that provides common logging properties and methods.
• LoggerEvent - Base class to handle logging using an event handler.
• LoggerEventArgs - Common event arguments to use when logging a message.

See .NET Helper Packages for technical documentation.

How to Use

To use in a C# program:

using Logging.Helper;

internal static readonly Logger sLogger = new( typeof( Program ) );

Logging can be performed using:

sLogger.Debug( "Logging a debug message" );
sLogger.Info( "Logging a information message" );
sLogger.Warn( "Logging a warning message" );
sLogger.Error( "Logging an error message" );
sLogger.Error( "With exception", ex );

Note: sLogger.Log can also be used to log an informational message.

To allow a processing class to log using the logger created in the main program it must inherit from the Logging.Helper.LoggerEvent class.

The processing class would look something like this:

using System;
using Logging.Helper;

public class ProcessingClass : LoggerEvent
{
  internal int DoProcessing()
  {
    var retValue = 0; // Assume normal completion
    try
    {
      // This method is inherited from the LoggerEvent class
      RaiseLogEvent( "Information message about the processing..." );
    }
    catch( Exception ex )
    {
      RaiseLogEvent( ex.ToString(), LogSeverity.Fatal );
      retValue = -1; // Abnormal completion
    }
    return retValue;
  }
}

The raise log handler must be set for the ProcessingClass object so that it will use the internal logger defined in the main program.

// Create an object from a class that inherits LoggerEvent
var logicClass = new ProcessingClass();
logicClass.RaiseLogHandler += Logging.OnRaiseLog;

// Do Processing and set the Exit code
logicClass.DoProcessing();

Advanced Logging

To enable advanced NLog logging create a nlog.config (all lowercase) file in the root of your application project and set the file Property: Copy if newer.

• For detailed information about NLog configurations Configuration File.
• For tutorials and documentation see the NLog Wiki site.

Example XML for a stand-alone NLog.config:

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <targets>
    <target xsi:type="File" name="logfile" fileName="c:\temp\console-example.log"
            layout="${longdate} ${uppercase:${level:padding=-5}} ${message}"/>
    <target xsi:type="Console" name="logconsole"
            layout="${longdate} ${uppercase:${level:padding=-5}} ${message}"/>
  </targets>
  <rules>
    <logger name="*" minlevel="Debug" writeTo="logconsole" />
    <logger name="*" minlevel="Debug" writeTo="logfile" />
  </rules>
</nlog>

Feedback

This is provided as open source under the MIT license.
Bug reports and contributions are welcome in the GitHub repository.