log4net覆盖xml配置？

Question

I am using log4net which is being configured via a config file. There is one case where I would like everything to be logged in debug (some code used during an upgrade). Is there anyway I can get the current logging level, set it to debug, run the specified code, then back to whatever it was before?

Answer 1

You can add a section in the config file specifically for DEBUG using

 <logger name="MyApp.DebugLogging" additivity="false">
        <level value="DEBUG"/>
        <appender-ref ref="MainLog"/>
    </logger

Then in your code, you can access this logger using:

 private static readonly ILog debuglog = log4net.LogManager.GetLogger("MyApp.DebugLogging");

And use the variable in your code block as

 debuglog .Debug(ex);

The idea here is you should be able to create different loggers in your config file, then have flexibility of choosing which logger to use within your code blocks

Answer 2

Here's an idea:

Use log4net configuration file only. Set the "watch" flag to true, in order to watch it.

Inside this configuration file, set a logging filter (in each appender). Set its min level to, say, Info or whatever. See the Filters section in http://logging.apache.org/log4net/release/manual/configuration.html

Then, before the upgrade phase, edit the configuration file and change the filter's min level to, say, Debug .

Once the upgrade is done, set the filter's min level back to its original value.

Answer 3

这个问题讨论了Log4Net记录器的动态重新配置 ，它应该为您提供所需的信息。