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Introduction

Download Sample web.Config - 1.2 Kb

Log4net is an open source utility used for log/report statements to various kinds of output targets (Text file, Email, Database, Event Viewer etc.)

http://logging.apache.org/

It can be a very handy utility for application instrumentation purpose.

Configuring Log4net:

Step 1: Add a reference of Log4net.dll to the project.

Step 2: Add Global.asax to the project, if not already added. In the �Application_Start� event of global.asax add following code:

log4net.Config.XmlConfigurator.Configure();

Step 3: In web.config file, under Configuration->Configsections add following section:

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

Step 4: In web.config, add new section �<log4net>�. This section will contain all the settings related to log4net configuration.

Step 5: In web.config, under �log4net� section, add required appenders (output target) configuration sections in the following way:

File Appender configuration, used for log statements in a text file.       

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

<param name="File" value="Logs\\Log4Net.log"/>

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

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

</layout>

</appender>

          Smtp Appender configuration, used for log statements by sending email.

<appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">

<to value="" />

<from value="" />

<subject value="" />

<smtpHost value="" />

<bufferSize value="512" />

<lossy value="true" />

<evaluator type="log4net.Core.LevelEvaluator">

<threshold value="WARN"/>

</evaluator>

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

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

</layout>

</appender>

Step 6: In web.config file, under �log4net� section, for each appender, add loggers in the following way:

<logger name="File">

<level value="All" />

<appender-ref ref="LogFileAppender" />

</logger>

<logger name="EmailLog">

<level value="All" />

<appender-ref ref="SmtpAppender" />

</logger>

          ���

          ���

Step 7: Now whenever we want to log any information/error/warning, call appropriate method in the following manner:

          //for logging to file

          log4net.ILog logger = log4net.LogManager.GetLogger("File");

          //for emailing

          log4net.ILog logger = log4net.LogManager.GetLogger("EmailLog");

          logger.Info(�Starting page load�);

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Blank Page dhaval.upadhyay 2:17 9 Feb '09   Hi I have set as you have suggested but I am getting blank log file. Am i missing some thing? I am also not accessing this file untill Restarting the visual stodio. (Message Another Application is using file) Sign In·View Thread·PermaLink log4net is not working with Access and SQL-Server using ASP.NET Bimal Kothari 5:33 13 Aug '08   Hi, Can I have complete sample to insert log data in to Access and SQL-Server. I have verified that log4net is not working with Access and SQL-Server using ASP.NET after making all configuration correct and proper. Please provide me complete sample if it possible soon. Thanks, Bimal Sign In·View Thread·PermaLink 1.00/5 log4net is not working with Access and SQL-Server Bimal Kothari 5:32 13 Aug '08   Hi, Can I have complete sample to insert log data in to Access and SQL-Server. I have verified that log4net is not working with Access and SQL-Server using ASP.NET after making all configuration correct and proper. 1. Here is my config file: ------------------------------------------------------------------------------------------------ <!-- This section contains the log4net configuration settings --> <!--Levels - OFF, ALL, WARN, FATAL, INFO, ERRROR, DEBUG --> ------------------------------------------------------------------------------------------------ Please provide me complete sample if it possible soon. Thanks, Bimal Sign In·View Thread·PermaLink Need log4net Solution and sample for Access and SQL-Server Bimal Kothari 5:30 13 Aug '08   Hi, Can I have complete sample to insert log data in to Access and SQL-Server. I have verified that log4net is not working with Access and SQL-Server using ASP.NET after making all configuration correct and proper. Please provide me complete sample if it possible soon. Thanks, Bimal Sign In·View Thread·PermaLink Security Exception Manojkumar Sharma 1:49 6 Jun '08   I am facing security exception in asp.net 2.0. Below is the error Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. Source Error: Line 5: void Application_Start(object sender, EventArgs e) Line 6: { Line 7: log4net.Config.XmlConfigurator.Configure(); Line 8: Line 9: } Can anyone pls guide? Sign In·View Thread·PermaLink hi manoj22184 3:59 9 May '08   Thanks for your code and explanation but can you please tell me some more clear please i dnt have somuch experience please helpm me regarding this. Thank you in advance M.MANOJ manoj22184@gmail.com Sign In·View Thread·PermaLink Thanks ! andy_sinclair 6:49 1 Nov '07   I was using various bits and pieces from other sites to try and get logging of components working within ASP.NET. Nothing was working, but your checklist (especially the global.asax) did the trick ! Andy Sign In·View Thread·PermaLink Thank you, it's helpful! liuruicai 17:21 11 Oct '07   Thank you, it's helpful! Sign In·View Thread·PermaLink blank file RADman 5:26 10 Oct '07   Hello, I have tried to implement this solution and I do get an empty log file in my logs folder, but nothing ever gets written to it, can you perhaps hit the main items that I need to investigate to make sure I have it configured correctly? Thanks. Sign In·View Thread·PermaLink 5.00/5 Where should i add the new section satyamythily 7:00 26 Jul '07   Hi, where should i add a new section. please help me at point numner 4...i mean under which configuration i have to add the . can u please explain me with an example so that it will be helpful for me, if i add it under the it is giving me the error. where ever it is giving me the error. Thanks mythily Sign In·View Thread·PermaLink Re: Where should i add the new section [modified] Noman Mohammad 7:33 6 Aug '07   Firstly you have to add a section under configSections. If you dont have the configSections then add it right after configuration. Example: <configuration> <configSections> <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/< </configSections&;gt Once you have added that section then you add <log4net> section just after appSettings and connectionString for example: <appSettings> your code... </appSettings> <connectionString> -- if you have this section add after this or just after appsettings </connectionString> Now ADD: <log4net> <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender"> <file value="D:\example.log"/> <appendToFile value="true"/> <rollingStyle value="Date"/> <datePattern value="yyyyMMdd"/> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger - %message%newline"/> </layout> </appender> <root> <level value="DEBUG"/> < </root> </log4net> Simple! Nom84 -- modified at 12:43 Monday 6th August, 2007 Sign In·View Thread·PermaLink Nice nsebastian 12:47 20 Jun '07   Your article help me a lot. You must a god damn genious Sign In·View Thread·PermaLink 1.00/5 Best log4net guide I found reach4thelasers 7:57 28 May '07   Hey, thanks for this! Very well written and easy to follow - even for a complete beginner. I've seen a few log4net guides on code project, I think this is by far the best one. Thanks again, Kevin. Sign In·View Thread·PermaLink 1.00/5 logs LeleHalfon 7:55 8 May '07   where is the folder Logs ? should i create it? Sign In·View Thread·PermaLink Thank-you! Garbage Can 14:00 10 Dec '06   Thank-you for this article. It was difficult to quickly find info on setting up Log4Net within .NET 2 but your article efficiently explained the process. Thank-you and very much appreciated. Sign In·View Thread·PermaLink XmlConfiguratorAttributte TomO2 4:57 17 Oct '06   Another way to start up logging is to use log4net.Config.XmlConfiguratorAttribute: [assembly : XmlConfigurator(ConfigFile = "Log4Net.config", Watch = true)] With this attribute in your application (I put it in the AssemblyInfo.cs), log4net will use the file Log4Net.config instead of web.config. The Watch=true tells log4net to keep an eye on the file for changes. Sign In·View Thread·PermaLink 5.00/5 Re: XmlConfiguratorAttributte dnh 5:28 11 Apr '07   Very "Throughout human history, we have been dependent on machines to survive. Fate, it seems, is not without a sense of irony. " - Morpheus "Real men use mspaint for writing code and notepad for designing graphics." - Anna-Jayne Metcalfe Sign In·View Thread·PermaLink 5.00/5 Re: XmlConfiguratorAttributte todeti 7:44 23 Oct '07   But we can't find assemblyinfo file in .net 2.0 Sign In·View Thread·PermaLink Closing log files Dejan Grujic 23:29 16 Oct '06   This is all basic log4net setting. You've missed one important thing that's not very well documented and therefore much more useful: protected void Application_End(Object sender, EventArgs e) { LogManager.Shutdown(); } Before I added this I had cases when logs were not working any more after web application was restarted because log files were not unlocked properly. Sign In·View Thread·PermaLink 3.50/5 Re: Closing log files Vikramaditya S Shekhawat 23:32 16 Oct '06   I never faced this problem, but its always good to have such clean up code. Thanks Dejan Sign In·View Thread·PermaLink Directory write permissions Rodrigo Dias 2:36 16 Oct '06   By the way, you have to add write permissions to the destination directory is the asp.net folder for the FileAppenders, i.e., in your configuration you are writing the log files to the directory "Logs". You have to add write permissions to the directory for the ASP.NET user. At least for me i had to do that.... Sign In·View Thread·PermaLink 2.75/5 Re: Directory write permissions Vikramaditya S Shekhawat 2:39 16 Oct '06   yes, you are correct. Sign In·View Thread·PermaLink Re: Directory write permissions KrishanChaminda 15:11 19 Oct '06   Hi Has anyone used a network path to store the Log?. I need to use a network location. i hav given rights to this folder but i still cant write a log entry. Cheers cK Sign In·View Thread·PermaLink web.config Vladimir_V 9:05 13 Oct '06   Could you attach configured Web.config file please. Thanks, Vladimir Sign In·View Thread·PermaLink Re: web.config Vikramaditya S Shekhawat 22:12 14 Oct '06   Sure, will attach it on Monday, 16-Oct Thanks Vikram Sign In·View Thread·PermaLink

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