c# .net 如何使用log4net记录日志

官方提供的下载中包含有详尽的说明文档。 

http://logging.apache.org/log4net/download_log4net.cgi

需要提示的是如何在自己的WEB或者Winform项目中调用，以节约各位的时间。其实很简单，只要在：AssemblyInfo.cs中插入如下代码，即可成功调用

//log4net.config 是配置文件的名称，可以自行设置
//Watch 是表示在程序运行期间是否监视该配置文件的变动
[assembly: log4net.Config.XmlConfigurator( ConfigFile = "bin\\log4net.config", Watch = true )]

调用示例：

private static ILog log4User = LogManager.GetLogger( “logger-name” );
log4User.Info( "登录系统" );

配置文件示例

1、存入sqlserver

//log4net.config
<?xml version="1.0" encoding="utf-8" ?>
<log4net debug="false">
  <appender name="AdoNetAppender_sqlserver" type="log4net.Appender.AdoNetAppender">
    <bufferSize value="1" />
    <connectionType value="System.Data.SqlClient.SqlConnection" />
    <connectionString value="data source=localhost;initial catalog=KioskPisInfo;integrated security=false;persist security info=True;User ID=kiosk;Password=kiosk" />
    <commandText value="INSERT INTO L4Log ([Date],[Thread],[Level],[Logger],[Message],[Exception]) VALUES (@log_date, @thread, @log_level, @logger, @message, @exception)" />
    <parameter>
      <parameterName value="@log_date" />
      <dbType value="DateTime" />
      <layout type="log4net.Layout.RawTimeStampLayout" />
    </parameter>
    <parameter>
      <parameterName value="@thread" />
      <dbType value="String" />
      <size value="255" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%thread" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@log_level" />
      <dbType value="String" />
      <size value="50" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%level" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@logger" />
      <dbType value="String" />
      <size value="255" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%logger" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@message" />
      <dbType value="String" />
      <size value="4000" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%message" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@exception" />
      <dbType value="String" />
      <size value="2000" />
      <layout type="log4net.Layout.ExceptionLayout" />
    </parameter>
  </appender>
  <root>
    <level value="DEBUG" />
    <appender-ref ref="AdoNetAppender_sqlserver" />
  </root>
</log4net>

<bufferSize value="1" />， bufferSize为缓存容量，当log4net缓存的行数超过该值，才会把数据行插入数据库。

数据库对应表脚本

CREATE TABLE [dbo].[L4Log] (
    [Id] [int] IDENTITY (1, 1) NOT NULL,
    [Date] [datetime] NOT NULL,
    [Thread] [varchar] (255) NOT NULL,
    [Level] [varchar] (50) NOT NULL,
    [Logger] [varchar] (255) NOT NULL,
    [Message] [varchar] (4000) NOT NULL,
    [Exception] [varchar] (2000) NULL
)

2、存入文本中

<?xml version="1.0" encoding="utf-8" ?>
<log4net debug="false">
  <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
    <file value="c:\kiosklog\ws.txt" />
    <appendToFile value="true" />
    <rollingStyle value="Size" />
    <maxSizeRollBackups value="10" />
    <maximumFileSize value="600KB" />
    <staticLogFileName value="true" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="发生时间：%date%n事件级别：%-5level%n事件来源：%logger%n日志内容：%m%n------------------------------%n" />
    </layout>
  </appender>
  <root>
    <level value="WARN" />
    <appender-ref ref="RollingLogFileAppender" />
  </root>
</log4net>