log4net 使用教程

1.下载log4net （Google log4net） //已有

2.unzip log4net

3.运行VS,新建 c# Windows应用程序。

4.添加引用Log4NET

5.新建一个应用程序配置文件App.config（具体内容附在后面）

6.打开Form1.cs，

在Namespace上添加一行 [assembly: log4net.Config.DOMConfigurator(Watch=true)] 
（或者 编辑Assembly.cs文件,添加如下内容: 
[assembly:log4net.Config.DOMConfigurator( ConfigFileExtension="config",Watch=true)] ）

也可以在properties下面的AssemblyInfo.cs下添加

[assembly:log4net.Config.XOMConfigurator( ConfigFileExtension="config",Watch=true)] ）

在类Form1中添加一个静态变量

private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

7.添加一个按钮。在按钮处理函数中添加一行 log.Warn("你好！");

8.运行程序。点一下按钮。

OK,打开Bin\Debug\log-file.txt，可以看到“你好”。

附.App.config

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

<configuration>

<!-- Register a section handler for the log4net section -->

<configSections>

<section name="log4net" type="System.Configuration.IgnoreSectionHandler" />

</configSections>

<appSettings>

<!-- To enable internal log4net logging specify the following appSettings key -->

<!-- <add key="log4net.Internal.Debug" value="true"/> -->

</appSettings>

<!-- This section contains the log4net configuration settings -->

<log4net>

<!-- Define some output appenders -->

<appender name="LogFileAppender" type="log4net.Appender.FileAppender">

<param name="File" value="log-file.txt" />

<!-- Example using environment variables in params -->

<!-- <param name="File" value="${TMP}\\log-file.txt" /> -->

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

<!-- An alternate output encoding can be specified -->

<!-- <param name="Encoding" value="unicodeFFFE" /> -->

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

<param name="Header" value="[Header]\r\n" />

<param name="Footer" value="[Footer]\r\n" />

<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] <%X{auth}> - %m%n" />

</layout>

<!-- Alternate layout using XML

<layout type="log4net.Layout.XMLLayout" /> -->

</appender>

<!-- Setup the root category, add the appenders and set the default level -->

<root>

<level value="ALL" />

<appender-ref ref="LogFileAppender" />

<!-- <appender-ref ref="A" /> -->

</root>

<!-- Specify the level for some specific categories -->

<logger name="SLog4net.Form1">

<!-- <appender-ref ref="B" /> -->

<level value="ALL" />

<appender-ref ref="RollingLogFileAppender" />

</logger>

</log4net>

</configuration>

--------------------------------App.config

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

<configuration>

<!-- Register a section handler for the log4net section -->

<configSections>

<section name="log4net" type="System.Configuration.IgnoreSectionHandler" />

</configSections>

<appSettings>

<!-- To enable internal log4net logging specify the following appSettings key -->

<!-- <add key="log4net.Internal.Debug" value="true"/> -->

</appSettings>

<!-- This section contains the log4net configuration settings -->

<log4net>

<!-- Define some output appenders -->

<appender name="LogFileAppender" type="log4net.Appender.FileAppender">

<param name="File" value="log-file.txt" />

<!-- Example using environment variables in params -->

<!-- <param name="File" value="${TMP}\\log-file.txt" /> -->

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

<!-- An alternate output encoding can be specified -->

<!-- <param name="Encoding" value="unicodeFFFE" /> -->

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

<param name="Header" value="[Header]\r\n" />

<param name="Footer" value="[Footer]\r\n" />

<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] <%X{auth}> - %m%n" />

</layout>

<!-- Alternate layout using XML

<layout type="log4net.Layout.XMLLayout" /> -->

</appender>

<!-- Setup the root category, add the appenders and set the default level -->

<root>

<level value="ALL" />

<appender-ref ref="LogFileAppender" />

<!-- <appender-ref ref="A" /> -->

</root>

<!-- Specify the level for some specific categories -->

<logger name="SLog4net.Form1">

<!-- <appender-ref ref="B" /> -->

<level value="ALL" />

<appender-ref ref="RollingLogFileAppender" />

</logger>

</log4net>

</configuration>

//调用------------------------------------------------------------

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using log4net;

[assembly: log4net.Config.DOMConfigurator(Watch = true)]

namespace WindowsApplication1

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

private void button1_Click(object sender, EventArgs e)

{

log.Warn("你好！");

}

}