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log4net学习
Log4net 主要类:
Appender 配置附加器有很多种,主要用到的几种:
log4net.Appender.AdoNetAppender <记录到数据库配置access,sqlserver或者其他的数据库>
log4net.Appender.FileAppender <记录到记录日志到单个文件>
log4net.Appender.EventLogAppender <记录到记录日志到操作系统的事件>
log4net.Appender.RollingFileAppender <记录到记录日志到文件,可以设置文件的名字,或者多个文件>
<appender name="ADONetAppender_SqlServer" type="log4net.Appender.AdoNetAppender"> <appender name="AdoNetAppender_Access" type="log4net.Appender.AdoNetAppender"> <appender name="FileAppender" type="log4net.Appender.FileAppender"> <appender name="EventLogAppender" type="log4net.Appender.EventLogAppender"> <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
具体应用方法:
第一步:把log4net加入到引用
第二步:配置log4net config 可以配置成数据库或者文件或者操作系统事件里面
第三步:
如果是网站:
在global.asax里面新增配置
void Application_Start(object sender, EventArgs e) { // 在应用程序启动时运行的代码 log4net.Config.XmlConfigurator.Configure(); }
如果是web项目和winform项目或者控制台项目:
要在AssemblyInfo.cs 新增
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]
或者:
[assembly: log4net.Config.XmlConfigurator()] (把log4net的配置配置在web的配置文件时)
具体常用的是 log4net.Appender.RollingFileAppender 可以根据日期生成日志文件 和log4net.Appender.FileAppender区别是后者只能生成一个文件, log4net.Appender.FileAppender写的日志或追加或覆盖操作一个文件。
还有配置写日志时:
<root> <level value="ALL"/> <appender-ref ref="ADONetAppender_SqlServer"/> </root> <logger name="ADONetAppender_SqlServer"> <level value="All"/> <appender-ref ref="ADONetAppender_SqlServer"/> <appender-ref ref="FileAppender"></appender-ref> </logger>
用后者需要在 在log4net.LogManager.GetLogger 是填写正确的logger,不然获得不到节点就写不了日志
log4net.ILog log = log4net.LogManager.GetLogger("ADONetAppender_SqlServer");
log.Info("hello world!");
而前者用起来更方便,可以写出在那个类报的错
log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
log.Error("error", new Exception("hello world! 报错了!"));
常用配置如下:
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender"> <!--日志的路径--> <file value="log\log" /> <!--是否覆盖,默认是追加true--> <appendToFile value="true"/> <!--文件名称--> <DatePattern value="yyyyMMdd ".txt""></DatePattern> <!--设置无限备份=-1 ,最大备份数为1000--> <maxSizeRollBackups value="1000"/> <!--每个文件的最大20k--> <maximumFileSize value="20"/> <!--名称是否可以更改为false为可以更改--> <param name="StaticLogFileName" value="false" /> <param name="RollingStyle" value="Composite" /> <layout type="log4net.Layout.PatternLayout"> <param name="ConversionPattern" value="%d [%r] [%t] %-5p %c - %m%n%n" /> </layout> </appender>
写到sqlserver的配置:
<appender name="ADONetAppender_SqlServer" type="log4net.Appender.AdoNetAppender"> <!--<bufferSize value="http://www.mamicode.com/10" />--> <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/> <connectionString value="Server=localhost;UID=sa;PWD=sa;DataBase=log;Max Pool Size=1000"/> <commandText value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message]) VALUES (@log_date, @thread, @log_level, @logger, @message)"/> <parameter> <parameterName value="@log_date"/> <dbType value="DateTime"/> <!-- <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="http://www.mamicode.com/%date{yyyy‘-‘MM‘-‘dd HH‘:‘mm‘:‘ss‘.‘fff}" /> </layout> --> <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> </appender>
写到access配置:
<appender name="AdoNetAppender_Access" type="log4net.Appender.AdoNetAppender"> <bufferSize value="1" /> <connectionString value="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\\工作目录\\代码\\Demo\\LogDemo\\db\\access.mdb;User Id=;Password=;" /> <commandText value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message]) VALUES (@log_date, @thread, @log_level, @logger, @message)" /> <parameter> <parameterName value="@log_date" /> <dbType value="String" /> <size value="255" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date" /> </layout> </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="1024" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%message" /> </layout> </parameter> </appender> <appender name="ColoredConsoleAppender" type="log4net.Appender.ColoredConsoleAppender"> <mapping> <level value="ALL" /> <foreColor value="White" /> <backColor value="Red, HighIntensity" /> </mapping> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout> </appender> <!--写入到文件,是累加,不生成新的文件--> <appender name="FileAppender" type="log4net.Appender.FileAppender"> <!--日志写入路径--> <file value="log\log-file.txt" /> <!--overwritten/appended to default =true 默认是追加--> <appendToFile value="true" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout> </appender>
<!--写入到操作系统-->
<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender"> <ApplicationName value="msg"></ApplicationName> <LogName value="测试"></LogName> <MachineName value="zhangqi"></MachineName> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline"/> </layout> </appender>
<!--写入到文件-->
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender"> <!--<file value="http://www.mamicode.com/log/log.txt"/>--> <!--<file name="Client.Logging" value="http://www.mamicode.com/log/log" />--> <file value="log\log" /> <!--是否覆盖,默认是追加true--> <appendToFile value="true"/> <DatePattern value="yyyyMMdd ".txt""></DatePattern> <!--设置无限备份=-1 ,最大备份数为1000--> <maxSizeRollBackups value="1000"/> <!--每个文件的最大20k--> <maximumFileSize value="20"/> <!--名称是否可以更改为false为可以更改--> <param name="StaticLogFileName" value="false" /> <!--文件名称--> <!--<param name="DatePattern" value="http://www.mamicode.com/yyyyMMdd".txt"" />--> <param name="RollingStyle" value="Composite" /> <!--<param name="RollingStyle" value="http://www.mamicode.com/Composite" />--> <layout type="log4net.Layout.PatternLayout"> <param name="ConversionPattern" value="%d [%r] [%t] %-5p %c - %m%n%n" /> </layout> </appender>
<!--写入到文件,是累加,不生成新的文件-->
<appender name="FileAppender" type="log4net.Appender.FileAppender"> <!--日志写入路径--> <file value="log\log-file.txt" /> <!--overwritten/appended to default =true 默认是追加--> <appendToFile value="true" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout> </appender>
<root> <level value="ALL"/> <appender-ref ref="ADONetAppender_SqlServer"/> <appender-ref ref="RollingLogFileAppender"/> <appender-ref ref="EventLogAppender"></appender-ref> <appender-ref ref="AdoNetAppender_Access"></appender-ref> <appender-ref ref="ColoredConsoleAppender"></appender-ref> <appender-ref ref="FileAppender"></appender-ref> </root> <logger name="ConsoleApp.LoggingExample"> --><!--<appender-ref ref="B" />--><!-- <level value="http://www.mamicode.com/All"/> <appender-ref ref="ADONetAppender_SqlServer"/> <appender-ref ref="RollingLogFileAppender"/> </logger> <logger name="LoggingExample"> --><!--<appender-ref ref="B" />--><!-- <level value="http://www.mamicode.com/All"/> <appender-ref ref="ADONetAppender_SqlServer"/> <appender-ref ref="FileAppender"></appender-ref> </logger>
log4net学习