Log4Net Create a Rolling daily logfile file with Date in the Filename

Log4NetCreateRollingdailylogfilefilewithDateintheFilename TheCodeBuzz

Today in this article, we shall cover how to create a Log4Net rolling file with a date in the file name.

In our last article, we already learned how to perform file/Rolling File logging in applications using Log4Net in the .NET Core application.

Today in this article, we will cover below aspects,

Step1 – Add DatePattern in the log file
Step 2 – Diable StaticLogFileName in the config

We leveraged the dependency Injection framework to inject the Log4Net Logger object into the mini IoC DI container in a .NET Core Console application.

Today we will see how to customize the logging file behavior and will see how to add a date in the file.

Please use the below configuration in log4net.config file,

Step1 – Add DatePattern in the log file

<datePattern value="yyyy-MM-dd'.log'"/>

The above “<datePattern../>” tag allows you to use the date pattern in the generated logging file.

Step 2 – Diable StaticLogFileName in the config

This is another step that needs to be done to make date-based log file generation work.

<staticLogFileName value="false"/>

Here is below example of log4net config file,

<log4net>
  <appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
    <file value="logs\\TheCodeBuzz-" />
	<datePattern value="yyyy-MM-dd'.log'"/>
    <appendToFile value="true" />
	<staticLogFileName value="false"/>
    <maximumFileSize value="100KB" />
    <maxSizeRollBackups value="2" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date %5level %logger.%method [%line] - MESSAGE: %message%newline %exception" />
    </layout>
  </appender>
  <root>
    <level value="TRACE" />
    <appender-ref ref="RollingFile" />
  </root>
</log4net>

The generated file will be as below,

log4netrollingdailylogfilewithdateinthefilename TheCodeBuzz

below is how i have enabled the lognet logging

See below the implementation for HostBuilder and registration for Log4Net logging.

var builder = new HostBuilder()
                .ConfigureServices((hostContext, services) =>
                {
                    services.AddTransient<MyApplication>();
 
                })
                .ConfigureLogging(logBuilder =>
                {
                    logBuilder.SetMinimumLevel(LogLevel.Trace);
                    logBuilder.AddLog4Net("log4net.config");
 
                }).UseConsoleLifetime();
 
            var host = builder.Build();

For complete step-by-step details please refer below article.

Reference:

Logging Using Log4Net in .NET Core Console Application

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Happy Coding !!

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