记录日志(Log4Net)

一：Log4net的简单示例

1、新建控制台应用程序，右键属性，把其框架.NET Framework4 Client Profile 修改为.NET Framework4，此时项目中将会自动添加一个App.config文件

　　内容如下：　　

<?xml version="1.0"?>

<configuration>

<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup>

</configuration>

2、引用第三方类库：log4net.dll

3、在App.config文件中进行如下配置：　　

<?xml version="1.0"?>

<configuration>

  <configSections>

    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>

  </configSections>

  <log4net>

    <!-- Define some output appenders -->

    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">

      <file value="test.txt"/>

      <appendToFile value="true"/>

      <!--可存的日志文件的个数-->

      <maxSizeRollBackups value=""/>

      <!--每个日志文件的大小-->

      <maximumFileSize value="1024KB"/>

      <rollingStyle value="Size"/>

      <staticLogFileName value="true"/>

      <layout type="log4net.Layout.PatternLayout">

        <!--日志格式-->

        <conversionPattern value="%date [%thread] %-5level %logger - %message%newline"/>

      </layout>

    </appender>

    <root>

      <!--日志记录的级别：None-Fatal(崩溃级别)-ERROR(错误级别)-WARN(警告级别)-DEBUG(bug级别)-INFO(信息级别)-ALL(所有)-->

      <level value="DEBUG"/>

      <appender-ref ref="RollingLogFileAppender"/>

    </root>

  </log4net>

  <startup>

    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>

  </startup>

</configuration>

4、代码如下：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using log4net;

namespace Log4Demo

{

    class Program

    {

        static void Main(string[] args)

        {

            log4net.Config.XmlConfigurator.Configure();//初始化配置

            ILog log = log4net.LogManager.GetLogger("demo");//获取记录日志的实例

            log.Debug("这是调试信息！");

        }

    }

}

5、日志文件就会写入项目根目录bin\Debug下的一个test.txt文件中。

二、在项目中的应用

1、有一个MVC项目，首先引用log4net.dll类库，然后在web.config中配置，添加标识中的内容：　　

<configuration>

  <!--新加配置内容-->

  <configSections>

    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>

  </configSections>

  <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="App_Data/" />

      <param name="AppendToFile" value="true" />

      <param name="RollingStyle" value="Date" />

      <param name="DatePattern" value="&quot;Logs_&quot;yyyyMMdd&quot;.txt&quot;" />

      <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>

  <connectionStrings>

    <add name="ApplicationServices"

         connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true"

         providerName="System.Data.SqlClient" />

  </connectionStrings>

  <!--新加配置内容结束-->

  <appSettings>

    <add key="ClientValidationEnabled" value="true"/>

    <add key="UnobtrusiveJavaScriptEnabled" value="true"/>

  </appSettings>

  <system.web>

    <compilation debug="true" targetFramework="4.0">

      <assemblies>

        <add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />

        <add assembly="System.Web.Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />

        <add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />

        <add assembly="System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />

        <add assembly="System.Web.WebPages, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />

      </assemblies>

    </compilation>

2、然后在Global.asax.cs问价中，初始化我们的配置：　　

   protected void Application_Start()

        {

            AreaRegistration.RegisterAllAreas();

            RegisterGlobalFilters(GlobalFilters.Filters);

            RegisterRoutes(RouteTable.Routes);

            log4net.Config.XmlConfigurator.Configure();//初始化配置

        }

3、在HomeController中添加代码如下：　　

  public ActionResult Index()

        {

            ViewBag.Message = "欢迎使用 ASP.NET MVC!";

            ViewData["count"] = GetCount.TotalCount();

            try

            {

                int i = ;

                int y =  / i;

            }

            catch (Exception exception)

            {

                ILog log = LogManager.GetLogger("demo");

                log.Error("计算：" + exception.ToString());

            }

            return View();

        }

4、运行，自动生成日志文件。查看方式：右键，App_Data文件，在Windows资源管理器中打开，就会看到生成的日志文件。

巴特西

记录日志(Log4Net)

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