Log4net Settings in Web Project

To add log4net in web project steps are below:

1. Download and log4net dll in project where you want to use it.

2. We can write log in log file or we can send mail when an error occur. For these two options we have to make setup in Web.config file. Initially add following line after in web.config file.

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

a. Write log in log file only, add following code in web.config file. You can change the log file name “PC.log.txt” is the file name here.

<log4net debug="true">

<appender name="RollingLogFileAppender

type="log4net.Appender.RollingFileAppender">

<file value="App_Data\PC.log.txt" />

<appendToFile value="true" />

<rollingStyle value="Size" />

<maxSizeRollBackups value="10" />

<maximumFileSize value="10MB" />

<staticLogFileName value="true" />

<layout type="log4net.Layout.PatternLayout">

<conversionPattern value="%d [%t] %-5p %c - %m%n" />

layout>

appender>

<root>

<level value="DEBUG" />

<appender-ref ref="RollingLogFileAppender" />

root>

log4net>

b. Send log through mail need to add following line to web.config. In tag add e-mail address inside value. In tag create an account in gmail, add that e-mail address there. From all the error mail will be send. Put a mail subject in tag. In tag you may change the name but for that you have change the name in cs file also.

<log4net debug="true">

<appender name="SmtpAppender" type="log4netExtensions.SmtpClientSmtpAppender">

<to value="e-mail,e-mail" />

<from value="e-mail" />

<subject value="subject" />

<smtpHost value="smtp.gmail.com" />

<port value="587"/>

<authentication value="Basic" />

<bufferSize value="512" />

<lossy value="true" />

<evaluator type="log4net.Core.LevelEvaluator">

<threshold value="ALL"/>

evaluator>

<layout type="log4net.Layout.PatternLayout">

<conversionPattern value="%newline%date [%thread] %-5level %logger [%property{NDC}] - %message%newline%newline%newline" />

layout>

appender>

<logger name="PC.Web.Smtp">

<level value="All" />

<appender-ref ref="SmtpAppender" />

logger>

<root>

<level value="DEBUG" />

<appender-ref ref="RollingLogFileAppender" />

root>

log4net>

C. Combinly add both facility to web config add both appender in web.config file

<log4net debug="true">

<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">

<file value="App_Data\PC.log.txt" />

<appendToFile value="true" />

<rollingStyle value="Size" />

<maxSizeRollBackups value="10" />

<maximumFileSize value="10MB" />

<staticLogFileName value="true" />

<layout type="log4net.Layout.PatternLayout">

<conversionPattern value="%d [%t] %-5p %c - %m%n" />

layout>

appender>

<appender name="SmtpAppender" type="log4netExtensions.SmtpClientSmtpAppender">

<to value="e-mail,e-mail />

<from value="e-mail" />

<subject value="subject" />

<smtpHost value="smtp.gmail.com" />

<port value="587"/>

<authentication value="Basic" />

<bufferSize value="512" />

<lossy value="true" />

<evaluator type="log4net.Core.LevelEvaluator">

<threshold value="ALL"/>

evaluator>

<layout type="log4net.Layout.PatternLayout">

<conversionPattern value="%newline%date [%thread] %-5level %logger [%property{NDC}] - %message%newline%newline%newline" />

layout>

appender>

<logger name="PC.Web.Smtp">

<level value="All" />

<appender-ref ref="SmtpAppender" />

logger>

<root>

<level value="DEBUG" />

<appender-ref ref="RollingLogFileAppender" />

root>

log4net>

3. Now Add below line in AssebmlyInfo.cs file of web project

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "Web.config", Watch = true)]

4. Add below line in cs file where you are going to use it.

a. To write log in log file:

protected static log4net.ILog _Logger = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

b. To send mail:

protected static log4net.ILog _Logger = log4net.LogManager.GetLogger("PC.Web.Smtp");

Now _Logger object can be use. There are various method like Debug(), Info() etc.