logging - Log4net 创建自定义级别

Question

我知道可以在 log4net 中使用内置级别
信息、警告、错误和致命消息

是否可以创建新的？

Answer 1

这可以通过这里概述的扩展方法来完成:
http://rageshkrishna.com/2011/01/21/AddingCustomLogLevelsToLog4net.aspx

Adding some extension methods makes it dead simple to start using the new log levels:

public static class SecurityExtensions
{
   static readonly log4net.Core.Level authLevel = new log4net.Core.Level(50000, "Auth");

   public static void Auth(this ILog log, string message)
   {
      log.Logger.Log(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType,
          authLevel, message, null);
   }

   public static void AuthFormat(this ILog log, string message, params object[] args)
   {
      string formattedMessage = string.Format(message, args);
      log.Logger.Log(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType,
          authLevel, formattedMessage, null);
   }

}

And that’s it – now I can start using my new “Auth” logging level on any instance of ILog like this:

SecurityLogger.AuthFormat("User logged in with id {0} from IP address {1}", id, Request.UserHostAddress);