log4net用法

Win7 + VisualStudio2010 + .NetFramework 4.0 + MVC3.0

第一步，首先从官网下载dll
 http://logging.apache.org/log4net/index.html ，在项目添加引用log4net.dll

第二步，log4net配置
配置单独写一个配置文件log4net.config

<?xml version="1.0" encoding="utf-8"?>

<log4net>
	<!-- OFF, FATAL, ERROR, WARN, INFO, DEBUG, ALL -->
	<!-- Set root logger level to ERROR and its appenders -->
	<root>
		<level value="ALL"/>
		<appender-ref ref="SysAppender"/>
	</root>
	<!-- Print only messages of level DEBUG or above in the packages -->
	<logger name="WebLogger">
		<level value="DEBUG"/>
	</logger>
	<appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net" >
		<param name="File" value="D:/log/shipin/" />
		<param name="AppendToFile" value="true" />
		<param name="RollingStyle" value="Date" />
		<param name="DatePattern" value=""Logs_"yyyyMMdd".txt"" />
		<param name="StaticLogFileName" value="false" />
		<layout type="log4net.Layout.PatternLayout,log4net">
			<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
			<param name="Header" value="
----------------------header--------------------------
" />
			<param name="Footer" value="
----------------------footer--------------------------
" />
		</layout>
	</appender>
	<appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net">
		<layout type="log4net.Layout.PatternLayout,log4net">
			<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
		</layout>
	</appender>
</log4net>

　　日志可以写入各种数据库也可以各种方式写入文件，详细配置看官网

第三步，修改AssemblyInfo.cs，在最后添加一行

// 日志组件配置
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]

第四步，创建LogHelper使用logger

	public class LogHelper
	{
		private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
		public static void AddInfo(string str)
		{
			log.Info(str);
		}
		public static void AddDebug(string str)
		{
			log.Debug(str);
		}
		public static void AddWarn(string str)
		{
			log.Warn(str);
		}
		public static void AddFatal(string str)
		{
			log.Fatal(str);
		}
		public static void AddError(string str)
		{
			log.Error(str);
		}
	}

第五步，调用LogHelper

LogManager.LogHelper.AddError("a test error");

知其然，不知其所以然，记录下来，相信下文更精彩