I'm trying to use log4net with an external config file, but it does not work: nothing gets logged
<?xml version="1.0" encoding="utf-8" ?>
<log4net>
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="C:\\tmp\\test.log" />
<appendToFile value="true" />
<maximumFileSize value="100KB" />
<maxSizeRollBackups value="2" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%level %thread %logger - %message%newline" />
</layout>
</appender>
<root>
<appender-ref ref="RollingFile" />
</root>
</log4net>
If I use this line in Assembly.cs, test.lg is creatd when the BHO is registered with regasm, but not when the plugin is running:
[assembly: log4net.Config.XmlConfigurator(ConfigFile = #"C:\\tmp\\test.log4net", Watch = true)]
When I use this code inside the BHO, no log is adde to test.log:
XmlConfigurator.Configure(new System.IO.FileInfo(#"C:\\tmp\\test.log4net"));
log.Info("test");
I'm not sure what I am doing wrong.
The log4net configuration file was fine. The problem is that Internet Explorer ran in Protected Mode, which forbids BHOs to write to arbitrary folders. There are only a few folders where the BHO can write.
Related
I am using log4net for logging in my webapi. logging is working fine in my localhost or while i am deploying it on a app server. Same thing is not working in azure web service. Folder where log file has to be created is there but no files in there.
i have added below section in my web.config file,
<log4net>
<appender name ="ErrorLog" type ="log4net.Appender.RollingFileAppender">
<file value ="MyLogs\"/>
<staticLogFileName value ="false" />
<appendToFile value ="true"/>
<rollingStyle value ="Date"/>
<datePattern value ="yyyy-MM-dd.'Err'" />
<lockingModel type ="log4net.Appender.FileAppender+MinimalLock"/>
<layout type ="log4net.Layout.PatternLayout">
<conversionPattern value ="%d{DATE} [%t] %-5p %c - %m%n" />
</layout>
</appender>
<logger name ="ErrorLog">
<maximumFileSize value ="15MB" />
<appender-ref ref="ErrorLog"/>
</logger>
</log4net>
It seems that there are some mistake with log4net configuration.
Here I have a complete steps you could follow with and it works well on my site:
1.Install the log4net.dll binary using NuGet.
2.Configure the log4net name, type properties in the web.config
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net"/>
</configSections>
</configuration>
3.Configure the log4net properties
<log4net>
<root>
<level value="Debug"/>
<appender-ref ref="LogFileAppender"/>
</root>
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender">
<param name="File" value="D:\Home\LogFiles\Log4Net\Log4Net.log"/>
<param name="AppendToFile" value="true"/>
<rollingStyle value="Size"/>
<maxSizeRollBackups value="10"/>
<maximumFileSize value="3MB"/>
<staticLogFileName value="true"/>
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%date [%thread] %-5level %logger - %message%newline"/>
</layout>
</appender>
<logger name="SleepyCore">
<level value="INFO"/>
</logger>
</log4net>
Note: You need to specify the address of the log on azure like D:\Home
4.Modify the Global.asax Application_Start() method add the following code in the method.
log4net.Config.XmlConfigurator.Configure(new FileInfo(Server.MapPath("~/Web.config")));
5.Write log with an instance of the ILog interface
ILog log = LogManager.GetLogger("SleepyCore");
log.Info("Begin - Page_Load() at " + DateTime.Now.ToString("hh.mm.ss.ffffff"));
6.The output as below:
For more details about how to configure log4net on azure, you could refer to this article.
I implemented Console application that can run as Windows service (very similar to .NET console application as Windows service).
.NET framework 4
log4net 2.0.8
This is log4net config:
<?xml version="1.0" encoding="utf-8" ?>
<log4net>
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="Log\App_%date{yyyy-MM-dd}.log" type="log4net.Util.PatternString" />
<appendToFile value="true" />
<param name="maxSizeRollBackups" value="5" />
<rollingStyle value="Composite" />
<datePattern value="yyyy-MM-dd" />
<filter type="log4net.Filter.LevelRangeFilter">
<acceptOnMatch value="true" />
</filter>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%-3thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="RollingLogFileAppender" />
</root>
</log4net>
The very first line in Main(string[] args) is log4net initialization:
XmlConfigurator.ConfigureAndWatch(new FileInfo(AppDomain.CurrentDomain.BaseDirectory + "log4net.config"));
Logger is initialized at the top of Program class like this:
private static readonly ILog _log = LogManager.GetLogger(typeof(Program));
When service is started/restarted or console application is ran manually, log file is created with correct filename, e.g. App_2017-11-29.log. However, if I leave windows service running over night, at midnight new file with initial date is created and old file is appended yesterdays date. So for example, if I start service today, and leave it running for 3 days, this will be in log file
App_2017-11-29.log (current log file)
App_2017-11-29.log2017-12-01
App_2017-11-29.log2017-11-30
App_2017-11-29.log2017-11-29
Any idea why this is happening?
The <file value="" /> element determines the "base" filename and is determined once at application startup, the <datePattern value="" /> is appended after that, and substituted with the current date in the specified format.
So your config should look like this:
<rollingStyle value="Composite" />
<file value="Log\App_" type="log4net.Util.PatternString" />
<datePattern value="yyyy-MM-dd'.log'" />
<staticLogFileName value="false" />
I have a windows service application which is basically a solution created with VS2015 and contains 2 projects.
The first project is dealing with the service itself (start, stop, etc) while the second one is maintaining the process that will be executed due to launch of the service.
I am using the log4net to log messages into a file.
I wanted to created 2 separate log files for each project.
This has been configured into the service project and is up and running.
while it is not working for the second project.
So mainly my question is how to configure log4net to log into different files within one solution?
Configure log4net within the executing project only. If you want log messages from an specific assembly logged to a separate file make sure the root namespace for that assembly is unique and define two log4net appenders, each logging to a separate file and use logging filters to filter by namespace.
<!-- Will log only from the My.Process namespace -->
<appender name="ProcessLog" type="log4net.Appender.RollingFileAppender">
<filter type="log4net.Filter.LoggerMatchFilter">
<loggerToMatch value="My.Process" />
<acceptOnMatch value="true" />
</filter>
<filter type="log4net.Filter.DenyAllFilter" />
<file value="process.log" />
<!-- layout, etc -->
</appender>
<!-- will log everything except from the My.Process namespace -->
<appender name="ServiceLog" type="log4net.Appender.RollingFileAppender">
<filter type="log4net.Filter.LoggerMatchFilter">
<loggerToMatch value="My.Process" />
<acceptOnMatch value="false" />
</filter>
<file value="service.log" />
<!-- layout, etc -->
</appender>
And don't forget to add a reference to both appenders in the root element.
Assuming your first and second project have different root namespaces (e.g. Project1.Service and Project2.MaintainProcess), you can use 2 appenders and the logger hierarchy to split the log files by project:
<log4net>
<appender name="Project1Logger" type="log4net.Appender.RollingFileAppender">
<file value="Project1Logger.log" />
</appender>
<appender name="Project2Logger" type="log4net.Appender.RollingFileAppender">
<file value="Project2Logger.log" />
</appender>
<root>
<level value="ALL" />
</root>
<logger name="{Project1RootNamespaceHere}">
<appender-ref ref="Project1Logger" />
</logger>
<logger name="{Project2RootNamespaceHere}">
<appender-ref ref="Project2Logger" />
</logger>
</log4net>
If you don't want to use separate appenders and logger hierarchy then see this answer for an alternative method using a custom pattern substitution to use a single appender. I'm not sure of the performance implications of that approach though.
Complete configuration (with a MinimalLock file appender):
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2" />
</startup>
<log4net>
<!-- ALL, DEBUG, INFO, WARN, ERROR, FATAL, OFF -->
<appender name="RollingFileAppender_Info" type="log4net.Appender.RollingFileAppender">
<file value="Info.log" />
<encoding value="utf-8" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="100MB" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message %exception%newline" />
</layout>
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="DEBUG" />
<levelMax value="WARN" />
</filter>
</appender>
<appender name="RollingFileAppender_Error" type="log4net.Appender.RollingFileAppender">
<file value="Error.log" />
<encoding value="utf-8" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="100MB" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message %exception%newline" />
</layout>
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="ERROR" />
<levelMax value="FATAL" />
</filter>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingFileAppender_Info" />
<appender-ref ref="RollingFileAppender_Error" />
</root>
</log4net>
</configuration>
I have the following config file:
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net"/>
</configSections>
<log4net>
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender" >
<param name="File" value="D:\log.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="20" />
<maximumFileSize value="4MB" />
<staticLogFileName value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<root>
<level value="INFO" />
<appender-ref ref="LogFileAppender" />
</root>
</log4net>
Every line I am logging is written to Console as well, how can I cancel it?
I want it to be appended to the log.txt file ONLY, without anything in Console.
Either you have added console appender programmatically, or this configuration file is not used by log4net. Log4net don't add any default appenders (like default TraceListener in .net). And this configuration specifies only RollingFileAppender. So, verify which configuration file is used, and whether some appenders added in the code.
I am using Log4net in my application.
Can anyone please explain how to read my log files(Txt) and show it in my application.because my log files are there in another server.
What will be the config settings to read the log files from the server and show it in the C# application.
This is the code have used to write the logs.
<log4net>
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="\\10.8.8.87\temp\logs.log" />
<appendToFile value="true" />
<maximumFileSize value="10MB" />
<maxSizeRollBackups value="50" />
<rollingStyle value="Size" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%identity---- %date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingFile" />
</root>
</log4net>
Instead of an rollingfile appender you can better use for example a sql appender to log your exceptions to a database and from your application you can query the database. On this page you can find some config examples:
http://logging.apache.org/log4net/release/config-examples.html