In my vb.net project, I use log4net and use an absolute path for the log file. But in the end I need to write log file at C:\Users\UserName\AppData\Local\Temp\Log folder (the username is a variable). Can't find a way how to set this in the log4net file.
My log4net file currently like this:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<log4net>
<appender name="ExampleAppender" type="log4net.Appender.RollingFileAppender">
<file value="C:\Log\App.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>
<logger name="App">
<level value="ALL" />
<appender-ref ref="ExampleAppender" />
</logger>
</log4net>
</configuration>
Is there a way to perform this? thanks.
You can use environment variables like this:
<file type="log4net.Util.PatternString" value="${LOCALAPPDATA}\Temp\Log\App.log" />
This creates a log file (for me) at C:\Users\stuartd\AppData\Local\Temp\Log\App.log
Related
I am new to log4net and I am just trying to get familiar with it in a console line app. Firstly I noticed from the few tutorials that the general configuration differs slightly, so it maybe the case that I have not got things setup properly.
The console printed fine, but the tutorial I was following placed the file in the same directory of the console app. I found with mine I had to give it the explicit path to my project to work.
Here is my Program.cs
static void Main(string[] args)
{
XmlDocument log4netConfig = new XmlDocument();
log4netConfig.Load(File.OpenRead("log4net.config"));
var repo = LogManager.CreateRepository(Assembly.GetEntryAssembly(), typeof(log4net.Repository.Hierarchy.Hierarchy));
XmlConfigurator.Configure(repo, log4netConfig["log4net"]);
var logger = LogManager.GetLogger(typeof(Program));
logger.Error("Hello, World!");
}
Here is my config
<log4net>
<root>
<level value="ALL" />
<appender-ref ref="console" />
<appender-ref ref="file" />
</root>
<appender name="console" type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %level %logger - %message%newline" />
</layout>
</appender>
<appender name="file" type="log4net.Appender.RollingFileAppender">
<file value="c:\users\dpg\developer\TestLogging\TestLog4Net\loggingfun.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="5" />
<maximumFileSize value="25MB" />
<lockingmodel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline" />
</layout>
</appender>
</log4net>
you can use relative path for work folder
<file value="ErrorLog.txt"/>
for saving it to windows location such as LOCALAPPDATA
<file type="log4net.Util.PatternString" value="${LOCALAPPDATA}\Temp\Log\App.log" />
if using .NET core, and an environment variable like this:
<file type="log4net.Util.PatternString" value="${LOCALAPPDATA}\Temp\Log\App.log" />
the log file will end in App/bin/debug/${LOCALAPPDATA}\Temp\Log\App.log
I found a way to solve this problem, by using a GlobalContext property.
In code:
log4net.GlobalContext.Properties["LocalAppData"] = Environment.GetEnvironmentVariable("LOCALAPPDATA");
var repository = LogManager.GetRepository(Assembly.GetCallingAssembly());
XmlConfigurator.Configure(repository, new FileInfo("App.config"));
In App.config
<appender name="FileAppender" type="log4net.Appender.RollingFileAppender">
<param name="StaticLogFileName" value="true" />
<file type="log4net.Util.PatternString" value="%property{LocalAppData}\Temp\Log\App.log" />
<appendToFile value="true" />
<encoding value="utf-8" />
<rollingStyle value="Date" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%appdomain] [%thread] %-5level %logger - %message%newline%exception%newline" />
</layout>
</appender>
Those who are looking to set the file path to Project root dicrectory Path can refer below code. I have implemented this in .NET 5 API Project
Changes for Log4net.config file. Remember type="log4net.Util.PatternString" this line is very important
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="%property{LoggerFilePath}\Logs\server.log" />
<appendToFile value="true" />
<maximumFileSize value="100KB" />
<maxSizeRollBackups value="2" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %5level %logger.%method [%line] - MESSAGE: %message%newline %exception" />
</layout>
</appender>
Then, in Program.cs file
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureLogging((context,loggerBuilder) =>
{
log4net.GlobalContext.Properties["LoggerFilePath"] = context.HostingEnvironment.ContentRootPath;
loggerBuilder.ClearProviders();
loggerBuilder.AddLog4Net();
})
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
});
Cheers !
I am using ASP.NET Core and have created a Log4net logging provider.
My current log4net.config file looks like this:
<?xml version="1.0" encoding="utf-8" ?>
<log4net debug="true">
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logs\\" />
<appendToFile value="true" />
<DatePattern value="yyyy\\\\MM\\\\dd'.inf.log'" />
<rollingStyle value="Date" />
<param name="StaticLogFileName" value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%ndc] <%property{auth}> - %message%newline" />
</layout>
</appender>
<appender ref="HangfireLoggerAppender" type="log4net.Appender.RollingFileAppender">
<file value="logs\HangfireLog.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="1MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%-5p %d %5rms %-22.22c{1} %-18.18M - %m%n" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="LogFileAppender" />
</root>
<logger additivity="false" name="Hangfire">
<level value="INFO" />
<appender-ref ref="HangfireLoggerAppender" />
</logger>
</log4net>
The log is showing A LOT of asp.net core junk. SQL Logs ect.
I would like to filter out :
Microsoft.AspNetCore.*
Microsoft.EntityFrameworkCore.*
How do I do this with Log4net?
you need to configure logging on your WebHostBuilder as follows :
[Program.cs -> BuildWebHost(string[] args) ]
return WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
ConfigureLogging((hostingContext, logging) =>
{ logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
logging.AddFilter("Microsoft.AspNetCore", LogLevel.Information);
logging.AddFilter(" Microsoft.EntityFrameworkCore", LogLevel.Information);
logging.AddConsole();
logging.AddDebug();
})
.Build();
You call the logging.AddFilter method specifying the namespace as first parameter and LogLevel as the second parameter.
This can be also done using configuration in appsettings.json file if you don't want to do in code. You can read more here
This is how I create Session Factory using Fluent Nhibernate
public static ISessionFactory CreateSessionFactory()
{
FluentNHibernate.Cfg.FluentConfiguration fconfig;
fconfig = FluentNHibernate.Cfg.Fluently.Configure()
.Cache(c=>c.UseQueryCache())
.Database(FluentNHibernate.Cfg.Db.MsSqlConfiguration.MsSql2008
.ConnectionString(c => c.FromConnectionStringWithKey("Database"))
.ProxyFactoryFactory<NHibernate.ByteCode.LinFu.ProxyFactoryFactory>()
.Mappings(
m => m.FluentMappings
.AddFromAssemblyOf<NHibernateRepositoryRegistry>()
.Conventions.Add<Conventions.PrimaryKeyConvention>()
.Conventions.Add<Conventions.IdForeignKeyConvention>()
.Conventions.Add<Conventions.ReferenceForeignKeyConstraintNameConvention>()
)
// i have tried this but it did not work
//.ExposeConfiguration(config=>{config.SetProperty("show_sql", "false");});
return fconfig.BuildSessionFactory();
}
This is my log4net config inside Web.config
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="nhibernate.log" />
<appendToFile value="true" />
<maximumFileSize value="100KB" />
<maxSizeRollBackups value="2" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%level %thread %logger - %message%newline" />
</layout>
</appender>
<appender name="RollingFile2" type="log4net.Appender.RollingFileAppender">
<file value="nhibernatesql.log" />
<appendToFile value="true" />
<maximumFileSize value="100KB" />
<maxSizeRollBackups value="2" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%level %thread %logger - %message%newline" />
</layout>
</appender>
<logger name="NHibernate">
<level value="INFO" />
<appender-ref ref="RollingFile" />
</logger>
<logger name="NHibernate.SQL">
<level value="ALL" />
<appender-ref ref="RollingFile2" />
</logger>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingFile" />
</root>
</log4net>
I had ShowSql() setup perviously
and I was trying to set it via web.config appsettings so i can turn on or off based on configuration
so I removed ShowSql() and tried following ( right now i am just passing "false" value )
.ExposeConfiguration(config=>{config.SetProperty("show_sql", "false");});
also tried
.ExposeConfiguration(config=>{config.SetProperty("hibernate.show_sql", "false");});
but I am still getting sql generated in nhibernatesql.log file
I am using NHibernate v3.1.0.4000 and FluentNHibernate v1.2.0.712 and ASP.NET MVC3
does anyone know why sql is still generating?
does show_sql or ShowSql() is only meant for Console.output purpose and sql is sent to log4net regardless ?
my main concern is slow performance if ShowSQL is set to true
not sure whether I am setting ShowSql somewhere else
ok I think I got the answer
based on http://www.davesquared.net/2008/01/viewing-sql-generated-by-nhibernate.html
show_sql is used of Console.out purpose only and sql is sent to log4net regardless.. and that is why I am seeing sql in the logs
I have this in my web.config file (edited to reflect some changes):
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
</configSections>
<log4net debug="true">
<appender name="DebugAppender" type="log4net.Appender.AspNetTraceAppender">
<layout type="log4net.Layout.PatternLayout, log4net">
<param name="ConversionPattern" value="%d %p %m%n" />
</layout>
</appender>
<appender name="DataLog" type="log4net.Appender.RollingFileAppender">
<file value="c:\temp\nhlog.txt" />
<appendToFile value="true" />
<maximumFileSize value="100MB" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="5" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d{HH:mm:ss.fff} [%t] %-5p %c - %m%n" />
</layout>
</appender>
<root>
<priority value="DEBUG" />
<appender-ref ref="DebugAppender" />
</root>
<logger name="NHibernate" additivity="false">
<level value="INFO"/>
<appender-ref ref="DebugAppender"/>
</logger>
</log4net>
I'm calling log4net.Config.XmlConfigurator.Configure() from Application_Start().
I have [assembly: log4net.Config.XmlConfigurator(Watch = true)] in the AssemblyInfo.cs file in my web project.
Why do I get no NHibernate debugging messages in my output window? (I trying to get ALL of the messages that NHibernate spits out.) If I use the RollingFileAppender it works fine. I've tried the DebugAppender, TraceAppender, OutputDebugStringAppender, and AspNetTraceAppender and none of them output stuff to the output window.
Try using a different appender.
ConsoleAppenders probably don't work for web applications. Use something like a FileAppender.
See this for examples on configuraiton.
Similar to quip's answer, ConsoleAppender is not the right appender to use in a web application. An OutputDebugStringAppender will give you messages in your debug window. You may also want to look into AspNetTraceAppender.
You could try to associate the specific NHibernate logger with a log4net appender.
If you want to log all the generated sql, try adding this to your log4net config section:
<logger name="NHibernate.SQL" additivity="false">
<level value="DEBUG" />
<appender-ref ref="ConsoleAppender" />
</logger>
If, for some reason, you only wanted to log Select statements and diagnostic info, you could use NHibernate.Loader.Loader, like this:
<logger name="NHibernate.Loader.Loader" additivity="false">
<level value="INFO" />
<appender-ref ref="ConsoleAppender" />
</logger>
I have enabled log4net and run my app which is giving an exception.
But the log file is empty.
Doesn't NHibernate log info about the exception???
Malcolm
You need to configure log4net. Just by adding log4net dll to the project doesn't log anything. You need to create appenders to specify where all the loggin should be directed to. Create a xml file like this one:
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="Logs\Trace.log" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<maxSizeRollBackups value="30" />
<maximumFileSize value="1000KB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level - %message%newline" />
</layout>
<threshold value="DEBUG"/>
</appender>
<root>
<appender-ref ref="RollingFileAppender" />
</root>
</log4net>
...and configure it when starting up the application:
public static void Main()
{
var logconfig = new System.IO.FileInfo(PATH_TO_LOG_CONFIG);
if(logconfig.Exists)
{
log4net.Config.XmlConfigurator.ConfigureAndWatch(logconfig);
}
}