Use of Log4Net

The use of log4net is not complex. You can do it in three steps:

1. Reference log4net. dll;

2. Create a configuration file log4net. config;

3. Use log4net;

The attachment is a dll file and a config File sample. For more information, see.

In actual use, a class is usually written to initialize log4net and return the log4net instance:

Public static class Log4Net {// <summary> // Log4Net initialization /// </summary> public static void Log4NetInit () {log4net. config. xmlConfigurator. configureAndWatch (new System. IO. fileInfo (System. web. httpContext. current. server. mapPath (".. /Log4Net. config ");} // <summary> // return the log object // </summary> public static log4net. ILog Log () {return log4net. logManager. getLogger ("KangarooLog ");}}

In Global. asax, initialize the Log4Net Configuration:

Void Application_Start (object sender, EventArgs e) {// code that runs when the application is started // initialize Log4Net to configure Log4Net. Log4NetInit ();}

Use on the page:

Log4Net.Log().Error("Error");Log4Net.Log().Warn("Warn");Log4Net.Log().Info("Info");

Content of the Log4net. config configuration file:

<? Xml version = "1.0" encoding = "UTF-8"?>
<Log4net>
<Logger name = "KangarooLog">
<! -- Control log level: ALL | DEBUG | INFO | WARN | ERROR | FATAL | OFF -->
<! -- If no level value is defined, the default value is DEBUG -->
<Level value = "ALL"/>
<! -- <Appender-ref = "SmtpAppenderKangaroo"> </appender-ref> -->
<Appender-ref = "FileAppenderKangaroo"> </appender-ref>
</Logger>

<Appender name = "SmtpAppenderKangaroo" type = "log4net. Appender. SmtpAppender">
<To value = "Kangaroo@800best.com"> </to>
<From value = "Kangaroo@800best.com"/>
<Subject value = "Kangaroo Log Message"/>
<SmtpHost value = "smtp.800best.com"/>
<Username value = "Kangaroo"/>
<Password value = "Kangaroo"/>
<BufferSize value = "2048" type = "codeph" text = "/codeph"/>
<! -- Whether to discard the extra-long part -->
<Lossy value = "false"/>

<! -- When evaluator is used, it is good or bad. If it is unreliable, it is still true to use filter. -->
<! -- <Evaluator type = "log4net. Core. LevelEvaluator">
<Threshold value = "ERROR"/>
</Evaluator> -->
<! -- <Evaluator type = "log4net. Core. LevelEvaluator, log4net">
<Threshold value = "WARN"/>
</Evaluator> -->
<! -- Logs cannot be written. -->
<! -- <Filter type = "log4net. Filter. DenyAllFilter"/> -->

<! -- Logs with output levels between definitions -->
<Filter type = "log4net. Filter. LevelRangeFilter">
<Param name = "LevelMin" value = "ALL"/>
<Param name = "LevelMax" value = "OFF"/>
</Filter>

<Layout type = "log4net. Layout. PatternLayout">
<ConversionPattern value = "% newline % date [% thread] %-5 level % logger [% property {NDC}]: % newline % message % newline"/>
</Layout>
</Appender>
 
<Appender name = "FileAppenderKangaroo" type = "log4net. Appender. RollingFileAppender">
<! -- Absolute path -->
<! -- <File value = "D: \ KangarooLog.txt"> </file> -->
<Param name = "File" value = "./Log/KangarooLog. log"/>
<Param name = "AppendToFile" value = "true"/>
<! -- Relative path, under the root directory of the project -->
<! -- Take the last path as the standard, so no logs are written in the absolute path above -->
<! -- <File value = "./Log/Kangaroo.txt"> </file> -->
<! -- Prevent writing logs when multithreading occurs. The official saying is that the thread is not safe -->
<! -- In actual use, the local test is normal and logs cannot be written after deployment -->
<LockingModel type = "log4net. Appender. FileAppender + MinimalLock"/>
<AppendToFile value = "true"/>
<! -- Can be: Once | Size | Date | Composite -->
<! -- Composite is a combination of Size and Date -->
<RollingStyle value = "composite"/>
<! -- The maximum number of logs is the latest -->
<! -- When the rollingStyle node is Date, this node does not work -->
<! -- When the rollingStyle node is set to Size, only values are allowed -->
<! -- When the rollingStyle node is Composite, there is a value log every day -->
<MaxSizeRollBackups value = "10"/>
<! -- When backing up a file, add a suffix to the file name -->
<! -- When the suffix is *. txt, for example, AX.txt _ 2008-07-24.PxP should be a bug in the program -->
<! -- If the suffix is *. TXT, for example, AX.txt _ 2008-07-25.TXT -->
<DatePattern value = "_ yyyy-MM-dd.TXT"/>
<! -- Available unit: KB | MB | GB -->
<! -- Do not use decimal places; otherwise, the current log is always written. -->
<MaximumFileSize value = "2 MB"/>
<! -- Set to true. The current latest log file name is always the name in the file section -->
<StaticLogFileName value = "true"/>
<! -- Logs with the output level between INFO and ERROR -->
<Filter type = "log4net. Filter. LevelRangeFilter">
<Param name = "LevelMin" value = "INFO"/>
<Param name = "LevelMax" value = "ERROR"/>
</Filter>
<! -- Must be used in combination. The first one only filters out the WARN, and the second one rejects other log outputs. -->
<Filter type = "log4net. Filter. LevelMatchFilter">
<Param name = "LevelToMatch" value = "WARN"/>
</Filter>
<Filter type = "log4net. Filter. DenyAllFilter"/>

    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date [%thread] %-5level %logger [%ndc] - %message%newline" />
    </layout>
  </appender>
</log4net>

<! -- ====================================== Layout node configuration instructions ========================================= -->
<! -- Made By AX -->
<! -- % M (message): the output Log message, such as ILog. Debug (...) A message output -->
<! -- % N (new line): line feed -->
<! -- % D (datetime): time when the current statement is output -->
<! -- % R (run time): number of milliseconds consumed by the output program from running to executing to the current statement -->
<! -- % T (thread id): ID of the thread where the current statement is located -->
<! -- % P (priority): current priority of the log, that is, DEBUG, INFO, WARN... And so on -->
<! -- % C (class): name of the current log object, for example, -->
<! -- Mode string: %-10c-% m % n -->
<! -- Code: -->
<! -- ILog log = LogManager. GetLogger ("Exam. Log"); -->
<! -- Log. Debug ("Hello"); -->
<! -- The output is in the following format: -->
<! -- Exam. Log-Hello -->
<! -- % L: the row number of the output statement -->
<! -- % F: File Name of the output statement -->
<! -- %-Number: indicates the minimum length of the item. If not, fill it with spaces. -->
<! -- For example, if the conversion mode is % r [% t] %-5 p % c-% m % n, PatternLayout generates output similar to the following: -->
<! -- 176 [main] INFO org. foo. Bar-Located nearest gas station. -->

Source: http://www.cnblogs.com/qiangzi/archive/2009/08/07/1541023.html