log4net使用

dll文件下载：http://logging.apache.org/log4net/download_log4net.cgi

配置文件：

<?xml version="1.0"?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"/>
  </configSections>
  <log4net>
    <root>
      <level value="ALL"/>
      <appender-ref ref="rollingFile"/>
      <appender-ref ref="ColoredConsoleAppender"/>
    </root>
    <appender name="rollingFile" type="log4net.Appender.RollingFileAppender,log4net">
      <param name="File" value="log.txt"/>
      <param name="AppendToFile" value="false"/>
      <param name="RollingStyle" value="Date"/>
      <param name="DatePattern" value="yyyy.MM.dd"/>
      <param name="StaticLogFileName" value="true"/>
      <layout type="log4net.Layout.PatternLayout,log4net">
        <param name="ConversionPattern" value="%date [%thread] (%file:%line) %-5level %logger [%property{NDC}] - %message%newline"/>
      </layout>
    </appender>
    <appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net">
      <layout type="log4net.Layout.PatternLayout,log4net">
        <param name="ConversionPattern" value="%date [%thread] (%file:%line) %-5level %logger [%property{NDC}] - %message%newline"/>
      </layout>
    </appender>
    <appender name="ColoredConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
      <mapping>
        <level value="ERROR" />
        <foreColor value="White" />
        <backColor value="Red, HighIntensity" />
      </mapping>
      <mapping>
        <level value="WARN" />
        <backColor value="Yellow" />
      </mapping>
      <mapping>
        <level value="DEBUG" />
        <backColor value="Green" />
      </mapping>
      <mapping>
        <level value="INFO" />
        <backColor value="Blue" />
      </mapping>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] (%file:%line) %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
    </appender>
  </log4net>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
  </startup>
</configuration>

AssemblyInfo.cs 中添加： [assembly: log4net.Config.XmlConfigurator(Watch = true)]

程序中使用log4net：

using System;
using log4net;

namespace Demo01
{
    class Program
    {

        private static readonly ILog Log = LogManager.GetLogger(typeof(Program));

        static void Main(string[] args)
        {

            //记录严重错误
            Log.Fatal("fatal", new Exception("发生了一个致命错误"));

            //记录错误日志
            Log.Error("error", new Exception("发生了一个异常"));

            //记录警告信息
            Log.Warn("warn");

            //记录调试信息
            Log.Debug("debug");

            //记录一般信息
            Log.Info("info");

            Console.WriteLine("日志记录完毕。");
            Console.Read();


        }
    }
}

运行结果：