By Default we have the following values for following properties of a RollingFileAppender
- Rollingfileappender Log4net Config Error
- Log4net Datepattern
- Log4net Rollingfileappender Configuration
- staticLogFileName = true
- countDirection = –1
- rollingStyle = Composite
- maxSizeRollBackups = 0 // be careful with this
- maximumFileSize = “10MB”
- datePattern = '.yyyy-MM-dd'
PM Install-Package log4net 2. Add log4net.config file. Add a new file to your project in Visual Studio called log4net.config and be sure to set a property for the file. Set “Copy to Output Directory” to “Copy Always”. This is important because we need the log4net.config file to be copied to the bin folder when you build and run your app.
staticLogFileName indicates whether you need to keep writing (log) to the same file all the time. You will need to set it to false when using Date as the rolling style and you have large number of backups.
Optionally file.log.yyyy-mm-dd for current formated datePattern can by the currently logging file (or file.log.curSizeRollBackup (rollingStyle=Size) or even file.log.yyyy-mm-dd.curSizeRollBackup --- (rollingStyle=Composite)) This will make time based roll overs with a large number of backups much faster -- it won't have to rename all the backups!
Recommend to leave it at its default value “true”
countDirection when its value is –1, then newest logfile backup will always be file.log.1. hence this would involve more number of file renaming.
Rollingfileappender Log4net Config Error
By default newer files have lower numbers. (countDirection < 0) ie. log.1 is most recent, log.5 is the 5th backup, etc.. countDirection > 0 does the opposite ie. log.1 is the first backup made, log.5 is the 5th backup made, etc. For infinite backups use countDirection > 0 to reduce rollOver costs.
rollingStyle can be either Date, Size or Composite. the default setting Composite, uses a combination of Size and Date settings. Thus if you have the datePattern set to “.yyyy-MM-dd” and maxSizeRollBackups set to 10, themn it will maintain 10 log backups for each day.
If you have the DatePattern set to “.yyyy-MM-dd HH:mm” and maxSizeRollbackups = 10 then it will maintain 10 logfile backups per minute
Log4net Datepattern
Samples:
This will create infinite file backups with the countdirection > 0 so that the newest file has the latest/greatest name i.e. log.5 for the newest backup (5th backup)
Log4net Rollingfileappender Configuration
Download monopoly classic free full version for pc. This is a Composite RollingFileAppender which keeps max of 10 1MB log backups every minute
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Posted on Tuesday, March 3, 2009 3:50 PM | Back to topActive5 years, 6 months ago
I would like to create a log4net RollingFileAppender that creates a new file each time the program starts. It can roll if the file gets to big but must roll each time the application is started. The appender should not be added if another appender is configured in the configuration. In essence creating a default log configuration that can be overridden by changing the configuration file.
Ben GripkaBen Gripka12.4k55 gold badges3636 silver badges3737 bronze badges
1 Answer
After piecing together a number of other posts, I finally got this working. The implementation is in a static wrapper class. All you have to do is paste this code into your app, set the location to create the file, and call Log.Configure() when the application starts.
Ben GripkaBen Gripka12.4k55 gold badges3636 silver badges3737 bronze badges