How to use log4net in asp.net Project ?


Recently i had used log4net error handling plugin in one of my recent project. Previously i was using enterprise library for this task. But this is very flexible and essay to use in application.
We can use Log4net in our application using this few steps

Step 1: Install the Log4net plugin like this

Log4net

Step2: Inside the Configration section of Webconfig, keep this code related with log4net like this

  
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"></section>
  </configSections>

  <log4net>
    <appender name="LogFileAppender" type="log4net.Appender.FileAppender">
      <param name="File" value="C:\MyLog\test.txt"/>
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d [%t] %-5p %c %m%n"/>
      </layout>
    </appender>
    <root>
      <level value="All" />
      <appender-ref ref="LogFileAppender" />
    </root>
  </log4net>
  

Step 3: In global.aspx file, keep the code like this

protected void Application_Start(object sender, EventArgs e)
{
log4net.Config.XmlConfigurator.Configure();
}

Step 4: Now implement the error handling in your code like this

protected void btnClick_Click(object sender, EventArgs e)
{
log4net.ILog logger = log4net.LogManager.GetLogger(typeof(_Default));
try
{
// This is used for generating the error in code.
int a;
a = Convert.ToInt32(txtNum.Text);
Response.Write(a);
}
catch (Exception ex)
{
logger.Error(ex.StackTrace);
}

}

Now if there will be any exception occur in application then it will create the log in C:\MyLog\test.txt

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