How can I log to special folders (e.g. %APPDATA%
) using the app.config file?
I can do it programmatically, but I need to be able to use the app.config file for configuration. I have seen a post of using %envFolderPath
.It is not available in the latest released version, but only in their latest code.
Below is the code that I setting the log to special folders programmatically.
public void ExampleLog
{
XmlConfigurator.Configure();
var fileName = GetFileName();
var appender = new log4net.Appender.RollingFileAppender
{
Layout = new log4net.Layout.PatternLayout("%d - %m%n"),
File = fileName,
MaxSizeRollBackups = 10,
MaximumFileSize = "100MB",
AppendToFile = true,
Threshold = Level.Debug
};
appender.ActivateOptions();
BasicConfigurator.Configure(appender);
}
private static string GetFileName()
{
const string subPath = "MySubFolder";
var path = String.Format(@"{0}\{1}", Environment.GetFolderPath (Environment.SpecialFolder.CommonApplicationData), subPath);
const string logName = "Log.txt";
return Path.Combine(path, logName);
}
Pretty sure the syntax for this is available in the current release.
<file type="log4net.Util.PatternString" value="%env{APPDATA}\\MyApp\\Log.txt" />
If you need something more, you can look into option of subclassing the PatternString class, as described here: Log4Net can’t find %username property when I name the file in my appender