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Beginner License: The Code Project Open License (CPOL)
How to use log4netBy Suman KumarThis article describes the basic steps to be followed for using Log4net in a web application. |
C#, Windows, .NET, Visual Studio, ASP.NET, Dev Posted: 14 Jul 2006 Updated: 14 Jul 2006 Views: 60,067 Bookmarked: 46 times |
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Note: This is an unedited contribution. If this article is inappropriate,
needs attention or copies someone else's work without reference then please
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Download source code - 103.9 Kb
Step 1: Get the latest version of log4net library and add reference of it in your project.
Step 2: Add below line in your AssemblyInfo.cs file. Step 3: Add below section in Web.Config file.
RollingLogFileAppender describes the appender to be used for logging. This means that the log should be written in a file, which will rollover when full. There are several other appender available and more than one appender can be attached to a logger.
The layout is responsible for formatting the logging request, whereas an appender takes care of sending the formatted output to its destination. Layout used above would format the output as below: Step 4: If you want log4net to add its own diagnostics messages then add below lines in web.config file. Step 5: Now follow below steps in your code-behind.
Step 6: Now you are ready for logging. Use below statements to log your messages in log file:
Introduction
This article describes the basic steps to be followed for using Log4net in a web application. Log4net is an open source library that allows .NET applications to log statements to a variety of targets.
Background
This article assume you have basic working knowledge of C#, and ASP.NET programming.
Using the code
Log4net is very simple to use yet powerful logging option. This article describes log4net usage in a web application in six easy steps.
[assembly: log4net.Config.XmlConfigurator(ConfigFile="Web.config", Watch=true)] //For log4net 1.2.10.0Above statement provides the information about config file in which log4net configuration parameters are defined.
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net debug="true">
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="C:\\TestProj\\TestLog.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%-5p %d %5rms %-22.22c{1} %-18.18M - %m%n" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingLogFileAppender" />
</root>
</log4net>
Above section defines the configuration parameters to be used for logging.RollingLogFileAppender describes the appender to be used for logging. This means that the log should be written in a file, which will rollover when full. There are several other appender available and more than one appender can be attached to a logger.
The layout is responsible for formatting the logging request, whereas an appender takes care of sending the formatted output to its destination. Layout used above would format the output as below:
2006-07-14 20:26:04,033 [1736] ERROR Utility [PayStub] - Could not find a part of the path
"c:\inetpub\wwwroot\TestProj\Template\PayStub.xml"
<appSettings>
<add key="log4net.Internal.Debug" value="true" />
</appSettings>Add below lines after system.web section: <system.diagnostics>
<trace autoflush="true">
<listeners>
<add name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="C:\\TestProj\\TestProjlog4net.txt" />
</listeners>
</trace>
</system.diagnostics>
a. Add namespace
using log4net;
b. Add below declarations within class definition
private static readonly ILog log = LogManager.GetLogger(typeof(TestPage1).Name);OR
private static readonly ILog log = LogManager.GetLogger(
System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
if (log.IsErrorEnabled)
{
log.Error("Page Load failed : " + ex.Message);
}OR if (log.IsDebugEnabled)
{
log.Debug("Application loaded successfully.");
}We have just scratched the surface of log4net. There are several other good features available in log4net and it can be used to collect vital information for several purposes. Happy Programming.
History
- 07/14/2006 - Article submitted.
- 07/19/2006 - Added Sample Project & updated the article.
. Getting it to work is definately the worst (and maybe only?) problem of log4net.
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Last Updated: 14 Jul 2006 Editor: |
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