RE: How to pass parameters through coding in log4net Applications

[Nicko Cadell <ni...@neoworks.com>]

The parameters configured through the config file are just public
properties on the objects. If you want to programmatically create
appenders you can do so as follows:


log4net.Repository.Hierarchy.Hierarchy hierarchy =
(log4net.Repository.Hierarchy.Hierarchy)log4net.LogManager.GetRepository
();

log4net.Appender.FileAppender appender = new
log4net.Appender.FileAppender();
appender.File = "foo.txt";

log4net.Layout.PatternLayout patternLayout = new
log4net.Layout.PatternLayout("%message%newline");
patternLayout.ActivateOptions();
appender.Layout = patternLayout;
appender.ActivateOptions();
hierarchy.Root.AddAppender(appender);


If what you want to do is to programmatically update an appender that
you have specified in a config file then the first thing you need to do
is to locate the appender object.

You could do something like this to change the File property of a
FileAppender:

foreach(log4net.Appender.IAppender appender in
log4net.LogManager.GetRepository().GetAppenders())
{
  if (appender is log4net.Appender.FileAppender)
  {
    log4net.Appender.FileAppender fileAppender =
(log4net.Appender.FileAppender)appender;

    // Change value of properties
    fileAppender.File = "other.txt";

    // Reset file appender properties
    fileAppender.ActivateOptions();
  }
}

Cheers,
Nicko

> -----Original Message-----
> From: news [mailto:news@sea.gmane.org] On Behalf Of vicky
> Sent: 28 July 2005 07:47
> To: log4net-user@logging.apache.org
> Subject: How to pass parameters through coding in log4net Applications
> 
> hi,
> 
> Please tell me how can we pass the parameters like log 
> filename for a log4net file Appender through Code.
> Same i have problem in case of ADONetAppender like Connection String.
> 
> Thanks & regards
> Vicky
> 
> 
>