【log4net教程】log4net教程日志分类和自动维护示例-日志

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log4net教程日志分类和自动维护示例

public static ILog GetLogger(string repositoryName="")
        {
            if (string.IsNullOrEmpty(repositoryName)) return LogManager.GetLogger("Defalut");

            ILoggerRepository repository=null;
            try
            {
                repository=LogManager.GetRepository(repositoryName);
            }
            catch (Exception) { }

            //找到直接返回ilog
            if (repository !=null)
                return LogManager.GetLogger(repositoryName, "Defalut");

            //未找到则创建，多线程下很有可能创建时，就存在了
            try
            {
                repository=LogManager.CreateRepository(repositoryName);
            }
            catch (Exception)
            {
                repository=LogManager.GetRepository(repositoryName);
            }

            //配置日志等级  读取Appsettings默认配置 
            var appSet=ConfigurationManager.AppSettings.AllKeys;

            //查找日志等级
            const string logLevel="LogLevel";
            var hasSettings=Array.IndexOf(appSet, logLevel);
            if (hasSettings > -1)
            {
                var level=ConfigurationManager.AppSettings[logLevel].ToLower();
                if (level=="all") repository.Threshold=Level.All;
                else if (level=="debug") repository.Threshold=Level.Debug;
                else if (level=="info") repository.Threshold=Level.Info;
                else if (level=="warn") repository.Threshold=Level.Warn;
                else if (level=="error") repository.Threshold=Level.Error;
                else if (level=="fatal") repository.Threshold=Level.Fatal;
                else if (level=="off") repository.Threshold=Level.Off;
            }
            else repository.Threshold=Level.All;

            //查找输出Appender
            const string logAppender="LogAppender";
            hasSettings=Array.IndexOf(appSet, logAppender);
            if (hasSettings > -1)
            {
                var appenders=ConfigurationManager.AppSettings[logAppender].ToLower().Split(',');
                foreach (var appender in appenders)
                {
                    if (appender=="rollingfile") LoadRollingFileAppender(repository);
                    else if (appender=="console") LoadConsoleAppender(repository);
                    else if(appender=="trace") LoadTraceAppender(repository);
                }
            }
            else LoadRollingFileAppender(repository);

            return LogManager.GetLogger(repositoryName, "Default");
        }

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