Question

Have Log4Net configured in our application to use a date stamped name and a 10Meg file size limit.
This automatically causes a rollover to a new file at midnight and whenever the 10Meg limit is reached. I would also like to roll over the logging to a new file each time the application is started (or closed).
Can I get all three roll over behaviours?

Answer 1

Set appendToFile to false in your config file.

<appender name='RollingLogFileAppender' type='log4net.Appender.RollingFileAppender'> ....   <appendToFile value='false' /> .... </appender> 

EDIT: To answer Craig’s comment:

If you properly setup StaticLogFileName and CountDirection (see http://logging.apache.org/log4net/release/sdk/log4net.Appender.RollingFileAppender.html for more), then things roll as desired. We programmatically configure the logger in our app where we use this, but this is what the code looks like:

Dim Layout As New PatternLayout('%date{yyyy-MM-dd HH:mm:ss,fff} [%-6thread] %-5level %type{2}.%method(%line) - %message%newline')  Dim Appender As New log4net.Appender.RollingFileAppender() Appender.File = Path.Combine(FileSystemHelper.LogDirectory, LogFileName) Appender.Layout = Layout Appender.AppendToFile = False ' we will start a new one when the program starts' Appender.Name = 'RollingLogFileAppender' Appender.Threshold = LogLevel() 'May want to set this by configuration' Appender.RollingStyle = log4net.Appender.RollingFileAppender.RollingMode.Size 'This means it will start a new log file each time the log grows to 10Mb' Appender.MaximumFileSize = '10MB' Appender.MaxSizeRollBackups = -1 'keep an infinite number of logs' Appender.StaticLogFileName = True Appender.CountDirection = 1 ' to reduce rollover costs' log4net.Config.BasicConfigurator.Configure(Appender) Appender.ActivateOptions()