gdziadkiewicz commented on issue #163:
URL:
https://github.com/apache/logging-log4net/issues/163#issuecomment-2680890582
Hi @WorldRobertProject,
I found some time to dig in properly. The current codebase does not support
specifying the extension in the `DatePattern`.
To get the behaviour you are looking for, you could go with:
```xml
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<log4net>
<appender name="LogFileAppender"
type="log4net.Appender.RollingFileAppender">
<param name="File" value=".\Log\.log" />
<param name="AppendToFile" value="true" />
<param name="RollingStyle" value="Composite" />
<param name="DatePattern" value='yyyy-MM-dd' />
<param name="MaximumFileSize" value="5MB" />
<param name="MaxSizeRollBackups" value="10" />
<param name="StaticLogFileName" value="false" />
<param name="CountDirection" value="1" />
<param name="PreserveLogFileNameExtension" value="true"/>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy/MM/dd HH:mm:ss.fff}
[%-5p] %m (%M)%n"/>
</layout>
</appender>
<logger name="log">
<level value="debug" />
<appender-ref ref="LogFileAppender" />
</logger>
</log4net>
</configuration>
```
This will work thanks to the ` <param name="PreserveLogFileNameExtension"
value="true"/>` combined with file extension specified in `<param name="File"
value=".\Log\.log" />` .
Resulting log files:
* `.\Log\2025-02-25.0.log`
* `.\Log\2025-02-25.1.log`
...
You can also use the `File` to add a prefix to the log file names `<param
name="File" value=".\Log\prefix.log" />` + ` <param
name="PreserveLogFileNameExtension" value="true"/>`
Resulting log files:
* `.\Log\prefix2025-02-25.0.log`
* `.\Log\prefix2025-02-25.1.log`
@FreeAndNil I'm wondering if we should add support for specifying the
extension in the `DatePattern` (could be a breaking change for some users) or
focus on documenting the current behaviour better.
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