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A mainstay of software engineering is a concept called tracing. The first time I encountered the trace capability was in the C programming language, implemented as a macro. The basic idea is that you insert statements into your code that provide information about your application while it is running. This is referred to as tracing. Historically tracing was something that occurred while debugging and testing. As you might imagine writing trace information to a console was especially useful before the integrated debugger.
Updated (Sept2007) The code of this sample can be found at codeplex : http://www.codeplex.com/RidoCode One year ago we needed to define how to instrument our system, our first User Story was. Simple Interface to Log messages from code Configuration mechanism to indicate the destination sink Decoupling the write mechanism from the destination sink Decoupling from the component hoster (ASP.Net, Nunit, .EXE) Define Switches to define different trace levels (INFO, WARNING, ERROR) After some explorations (see http://blogs.msdn.com/rido/archive/2004/05/07/LogsAndTraces.aspx ) we decided to extend a little bit the Trace utilities provided by System.Diagnostics. While developing the system we have been using the System.Diagnostics.TextWriterTraceListener to write log content to a file. Now, we are in production, and we have seen some limitation with this tracelistener
This topic describes the format of trace data, how to view it, and approaches that use the Service Trace Viewer to troubleshoot your application. Using the Service Trace Viewer Tool The Windows Communication Foundation (WCF) Service Trace Viewer tool helps you correlate diagnostic traces produced by WCF listeners to locate the root cause of an error. The tool gives you a way to easily view, group, and filter traces so that you can diagnose, repair and verify issues with WCF services. For more information about using this tool, see Service Trace Viewer Tool (SvcTraceViewer.exe) .
A Guide to Controlling Trace Output As a summary to the vital concepts you have been reading about, Table 8 collects reference links that you may need.
I ran into a problem recently when working with the logging functionality built into .NET 2.0 inside the System.Diagnostics namespace. Everything's mostly very simple in here. System.Diagnostics.Trace.TraceInformation( "Something happened" ); System.Diagnostics.Trace.TraceError( "Oh no! Something happened" ); As you can see, we've logged two messages one at an Information level and another at Error level.
iagnostics, also known as "program tracing," is a crucial—and often overlooked and underappreciated—component of application development. I have long been an ardent believer in diagnostic support, and have written diagnostic systems from scratch for a diverse assortment of software and hardware products, including integrated circuit design tools, laser printers, and user interfaces. As Microsoft's .NET Framework Developer's Guide puts it, diagnostics is: "…a way to monitor the execution of your application while it is running.
Part 1 in a series introducing the Ukadc.Diagnostics project which is currently hosted on codeplex at www.codeplex.com/UkadcDiagnostics . In this post we'll look at the basics of logging in System.Diagnostics with .NET 2.0 (and above) before looking at how you can use Ukadc.Diagnostics to extend the functionality already available. In the previous post I mentioned a number of other logging frameworks including log4net , nlog and EntLib and it's worth referring to them again, as we look at logging in System.Diagnostics as they all work in much the same way. This diagram shows the typical 'architecture', if you will, behind these logging components. Typcially, you have one or more TraceSources (as System.Diagnostics call them) and it is against these instances that the developer logs events to describe the progress and/or state of a program at run-time.
By Mansoor Ahmed Siddiqui Two important programming operations/processes that help us create and maintain applications are called "Debugging" and "Tracing". Debugging allows us to observe and correct programming errors. Tracing is a form of Debugging that allows us to keep track of the health and sanitary conditions of our applications (It is a rather rigid and very specific definition). It is very important to be able to dynamically control the behavior of our application and to keep track of some of the aspects of the application (i.e. how our application is performing, what errors are produced at runtime, how application performs at peak time, how to dynamically alter the behavior of our application, etc).
This lightweight reference example should help users quickly get to grips with the new Ukadc.Diagnostics library. A number (though not all) of the features are demonstrated and can be downloaded and built in Visual Studio 2008. The source is available at the end of this page.
Comme un exemple vaut mieux qu'un long discours, dans ce chapitre, nous allons voir un exemple d'utilisation de log4net au sein d'un projet web. Nous verrons comment associer différents appenders à un même logger, comment configurer les informations à logger, comment jouer avec les niveaux de logs . Les sources du projet sont téléchargeables via le lien se trouvant à la fin de ce document. Attaquons dans le vif du sujet avec le fichier de configuration de log4net. Comme vu précédemment, ce fichier permet principalement de définir quelles informations seront loggées, de quelle manière, vers quel support.
What is Apache log4net™ The Apache log4net library is a tool to help the programmer output log statements to a variety of output targets. log4net is a port of the excellent Apache log4j™ framework to the Microsoft® .NET runtime. We have kept the framework similar in spirit to the original log4j while taking advantage of new features in the .NET runtime.
Introduction One of the greatest logging tools out there for .NET is log4net. This software is the gold standard for how logging should be done. It is simple, powerful, and extensible.
Following are the important classes in Diagnostics namespace. System.Diagnostics.EventLog This component provides functionality to write to event logs, read event log entries, and create and delete event logs and event sources on the network. Some related classes: EventLog : Provides interaction with Windows event logs EventLogEntry : Encapsulates a single record in the event log.