Log4net does not write the log in the log file

user_110944 0
Viewed 169040

I have created a simple scenario using Log4net, but it seems that my log appenders do not work because the messages are not added to the log file.

I added the following to the web.config file:

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

<log4net>
    <appender name="LogFileAppender" type="log4net.Appender.FileAppender">
            <file value="D:\MyData\Desktop\LogFile.txt" />
            <appendToFile value="true" />
            <encoding value="utf-8" />
            <layout type="log4net.Layout.SimpleLayout" />
    </appender>


    <root>
        <level value="INFO" />
        <appender-ref ref="LogFileAppender" />
    </root>
</log4net>

Within the global ASAX file I have added:

ILog logger = LogManager.GetLogger(typeof(MvcApplication));

And within the Application_Start method:

logger.Info("Starting the application...");

Why the test log "Starting the application..." is not being added to the log file?

log4net-appender log4net logging asp.net-mvc asp.net
13 Answers

In my case I had to give the IIS_IUSRS Read\write permission to the log file.

user_2184080

Make sure the following line code should be there in AssemblyInfo.cs file.

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

and also check for this line in Application_start() method.

log4net.Config.XmlConfigurator.Configure();
user_107593810
user_41849580

Your config file seems correct. Then, you have to register your Log4net config file to application. So you can use below code: 

var logRepo = LogManager.GetRepository(Assembly.GetEntryAssembly());
XmlConfigurator.Configure(logRepo, new FileInfo("log4net.config"));

After registering process, you can call below definition to call logger:

private static readonly ILog log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

log.Error("Sample log");
user_12711420

There are a few ways to use log4net. I found it is useful while I was searching for a solution. The solution is described here: https://www.hemelix.com/log4net/

user_29475890
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