I have a problem logging to a file when using log4net and my XML configuration in the app.config below. The logfile doesn't appear on the filesystem, so there is probably something wrong, but I can't figure out what it might be.
The code and configuration is shown below.
App.config
</configSections>
<log4net>
<appender name="Console" type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout">
<!-- Pattern to output the caller's file name and line number -->
<conversionPattern value="%5level [%thread] (%file:%line) - %message%newline" />
</layout>
</appender>
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="example.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>
<level value="ALL" />
<appender-ref ref="Console" />
<appender-ref ref="RollingFile" />
<appender-ref ref="LogFileAppender" />
</root>
</log4net>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
</startup>
<system.serviceModel>
<bindings />
<client />
</system.serviceModel>
<applicationSettings>
<NetSuiteClient.Properties.Settings>
<setting name="NetSuiteClient_com_netsuite_webservices_NetSuiteService"
serializeAs="String">
<value>https://webservices.netsuite.com/services/NetSuitePort_2016_1</value>
</setting>
</NetSuiteClient.Properties.Settings>
</applicationSettings>
</configuration>
Declaring:
private static readonly ILog _Log = LogManager.GetLogger(typeof(Form));
Calling:
private void Form1_Load(object sender, EventArgs e)
{
_Log.Info("Info");
_Log.Debug("Debug");
_Log.Error("Error");
}
Are you instructing Log4Net to look for its configuration in the app.config file? You can do that by using the following assembly-level attribute:
[assembly: log4net.Config.XmlConfigurator(Watch=true)]
Example taken from here
Related
I built a basic windows service in c# in VS2017 straight from the project template Windows Service. Built no problem. Installed no problem.
Here is the app.config with log4net section:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2" />
</startup>
<log4net>
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="log.txt" />
<appendToFile value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<appender name="ConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
<mapping>
<level value="ERROR" />
<backColor value="Red, HighIntensity" />
</mapping>
<mapping>
<level value="WARN" />
<foreColor value="White" />
<backColor value="Yellow" />
</mapping>
<mapping>
<level value="INFO" />
<foreColor value="White" />
</mapping>
<mapping>
<level value="DEBUG" />
<backColor value="Green" />
</mapping>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="ConsoleAppender" />
<appender-ref ref="FileAppender" />
</root>
</log4net>
</configuration>
And I want to log some events, like here:
public partial class Service1 : ServiceBase
{
private ILog log = LogManager.GetLogger(typeof(Service1));
public Service1()
{
InitializeComponent();
XmlConfigurator.Configure();
}
protected override void OnStart(string[] args)
{
log.Info("OnStart");
}
protected override void OnStop()
{
log.Info("OnStop");
}
}
When I start the service, I dont see any log.txt file created in the folder where the exe resides (Debug\Bin).
Any idea why?
I think the issue here I think is that your log variable is being initialized prior to the constructor being called. So basically you are calling LogManager.GetLogger prior to calling XmlConfigurator.Configure()
Try initializing log in the constructor after configuring log4net and see if that solves your problem.
public Service1()
{
InitializeComponent();
XmlConfigurator.Configure();
log = LogManager.GetLogger(typeof(Service1));
}
Adding another answer since my previous hunch seemed to be wrong (or maybe you actually have two problems here). Assuming you posted your whole app.config file, it doesn't look like you declare the log4net config section anywhere in there:
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
Perhaps that's the problem?
In my particular case, we always set the app.config file when initialize Log4Net on the Class Constructor:
log4net.Config.XmlConfigurator.Configure(new Uri(Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "YouAppConfigFile.config")));
Log = log4net.LogManager.GetLogger("ServiceClass1");
Log.Info("ServiceClass1 Started!!!");
log file is not getting created,
using below call to get logger and config file.
is it required to give full path for file?
private static readonly log4net.ILog logger = log4net.LogManager.GetLogger
(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=1b44e1d426115821" requirePermission="false"/>
</configSections>
<!-- Log4net Logging Setup -->
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="log.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="50" />
<maximumFileSize value="50MB" />
<staticLogFileName 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="RollingFileAppender" />
</root>
</log4net>
</configuration>
Does your code call
log4net.Config.XmlConfigurator.Configure();
on startup?
The <root> section I use has priority, not level:
<root>
<priority value="ALL" />
<appender-ref ref="LogFileAppender" />
</root>
(Apparently, that's not the issue https://stackoverflow.com/a/24188507/21336)
after adding below line in AssemblyInfo.cs, could see log file getting created and logs coming.
[assembly: log4net.Config.XmlConfigurator(Watch = true)]
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 a DLL class that create log4net log:
[SetUpFixture]
public class Application
{
private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
[SetUp]
private Application()
{
log4net.Config.BasicConfigurator.Configure();
ILog log = log4net.LogManager.GetLogger(typeof(Application));
log.Debug("This is a debug message");
log.Warn("This is a warn message");
}
}
and Log4Net.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=1b44e1d426115821" />
</configSections>
<!-- Log4net Logging Setup -->
<log4net>
<appender name="FileAppender" type="log4net.Appender.FileAppender,log4net">
<file value="c:\\mylogfile.txt" />
<appendToFile value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline" />
</layout>
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="INFO" />
<levelMax value="FATAL" />
</filter>
</appender>
<root>
<level value="DEBUG"/>
<appender-ref ref="FileAppender"/>
</root>
</log4net>
</configuration>
My program starts the nunit.exe by:
string nunitAppPath = #"C:\Program Files (x86)\NUnit 2.6.4\bin\nunit.exe";
Process.Start(new ProcessStartInfo(nunitAppPath));
and have a reference to DLL.
I have a text file in c name :mylogfile.txt, but it's always null.
log4net is not creating any text file to log. I tried like this
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="EpinovaADSyncJob.log" />
<appendToFile value="false" />
<rollingStyle value="Composite" />
<staticLogFileName value="false" />
<datePattern value="yyyy-MM-dd" />
<preserveLogFileNameExtension value="true"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline%exception" />
</layout>
</appender>
<root>
<level value="INFO"/>
<appender-ref ref="RollingFileAppender"/>
<appender-ref ref="ConsoleAppender" />
</root>
</log4net>
</configuration>
In assembly file:
[assembly: log4net.Config.XmlConfigurator(
ConfigFile = "Log4Net.config", Watch = true)]
Declared as class variable
private static readonly ILog Log = LogManager.GetLogger(
MethodBase.GetCurrentMethod().DeclaringType);
In a method, called the Log like this
BasicConfigurator.Configure();
Log.Debug("Myjob");
Log.Error("newlkjasdf");
Log.Info("lkjlkjasdfasdf");
Try this appender :
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="log.txt" />
<appendToFile value="false" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="-1" />
<maximumFileSize value="10MB" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%-5p%d{yyyy-MM-dd hh:mm:ss} – %m%n" />
</layout>