Get log4net log file in C#

Solution 1:

Solution is quite easy in your situation; just use this code:

var rootAppender = ((Hierarchy)LogManager.GetRepository())
                                         .Root.Appenders.OfType<FileAppender>()
                                         .FirstOrDefault();

string filename = rootAppender != null ? rootAppender.File : string.Empty;

Solution 2:

When having multiple file appenders, you might want to get them by name. Also to make sure to get the appender even if it is not referenced by the root node, the following code helps:

public static string GetLogFileName(string name)
{
     var rootAppender = LogManager.GetRepository()
                                  .GetAppenders()
                                  .OfType<FileAppender>()
                                  .FirstOrDefault(fa => fa.Name == name);

     return rootAppender != null ? rootAppender.File : string.Empty;
}