Im trying to create a log file using log4net.
I have it create a log file. But i can't get the name of the log file to be the current date.
I have tried this:
<file value="log\\$date.txt"/>
But this just leans me with a file called "$date.txt" in the log folder.
I would like the file to be named "25-04-2012.txt"
Anyone know the little trick to make this work?
From the documentation, you should use a RollingFileAppender
This example show how to configure the RollingFileAppender to roll log
files on a date period. This example will roll the log file every
minute! To change the rolling period adjust the DatePattern value. For
example, a date pattern of "yyyyMMdd" will roll every day. See
System.Globalization.DateTimeFormatInfo for a list of available
patterns.
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logfile" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd-HHmm" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
Documentation (search for rollingFileappender)
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender" >
<param name="File" value="C:\Akhila\logger\logger\bin\Debug\log-" />
<param name="AppendToFile" value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyy-MM-dd" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%-5p%d{yyyy-MM-dd hh:mm:ss} – %m%n" />
</layout>
</appender>
Related
This question already has answers here:
Having a log per day
(3 answers)
Closed 5 years ago.
I've inherited an application that I need to keep more than a single days of logs.
It is using log4net for it's logging, and I have the log4net.config file contents below:
<?xml version="1.0"?>
<log4net>
<appender name="Console" type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logs\connector.log" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="5MB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<root>
<level value="INFO" />
<appender-ref ref="Console" />
<appender-ref ref="RollingFileAppender" />
</root>
</log4net>
The file in the log directory never has a date in it and is always called connector.log.
It's created date is from a long time ago, so I think it is simply emptying the file when it ticks over to a new day (and the timestamp of logs in that file prove that).
How would I change this so that it keeps a log file per day.
<appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net">
<param name="File" value="App_Data/" />
<param name="AppendToFile" value="true" />
<param name="RollingStyle" value="Date" />
<param name="DatePattern" value=""Logs_"yyyyMMdd".htm"" />
<param name="StaticLogFileName" value="false" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="<HR COLOR=red>%n异常时间：%d [%t] <BR>%n异常级别：%-5p <BR>%n异 常 类：%c [%x] <BR>%n%m <BR>%n <HR Size=1>" />
<!--<conversionPattern value="%newline %n记录时间：%date %newline %n 线程ID:[%thread] %n日志级别： %-5level %n跟踪描述：%message%newline %n"/>-->
</layout>
</appender>
needn't define log file's name
below is the code of my logger config file. When a new txt file is created in my LogFolder, my goal is to append the current timestamp in the name of the file.
For example, on July 20th 2015 at 10:27:19am, the file name should be named "logger_2015-07-20_10-27-19.txt"
With the code that I provided, a logger file do get created, but its name is "logger-.txt". The timestamp failed to show up.
Do I need to provide a reference for "${byTimeStamp(local)}? If so, how would I be able to do that?
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
</configSections>
<log4net>
<timestamp key="byTimeStamp" datePattern="yyyy-MM-dd_HH-mm-ss" timeReference="contextBirth"/>
//Here is where I set the name of the logger txt.
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender">
<param name="File" value="C:\LogFolder\logger_${byTimeStamp(local)}.txt" />
<param name="AppendToFile" value="true"/>
<param name="RollingStyle" value="Once"/>
<param name="DatePattern" value="yyyy-MM-dd'.txt'" />
<preserveLogFileNameExtension value="true"/>
<maxSizeRollBackups value="20" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="LogFileAppender" />
</root>
</log4net>
</configuration>
Another way to accomplish this:
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString">
<conversionPattern value="log (%date{yyyy.MM.dd - HH-mm-ss}).log" />
</file>
[...]
</appender>
<appender name="rollingFile" type="log4net.Appender.RollingFileAppender,log4net">
<param name="File" value="c:\\ProjectX\\Log\\logger_.txt"/>
<param name="AppendToFile" value="true"/>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
<param name="RollingStyle" value="Date"/>
<param name="DatePattern" value="yyyy.MM.dd"/>
<param name="StaticLogFileName" value="true"/>
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="ConversionPattern" value="%date [%thread] %-5level %logger - %message%newline"/>
</layout>
</appender>
As per Nuno G on Append current Date to Log file with Log4Net
Requires a bit of code, and the secret is to call the configuration after updating the property so it gets picked up.
The config...
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="C:\logfolder\logger-%property{ts}.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="1024KB" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %-5level %.30logger - %message%newline" />
</layout>
</appender>
Then in the code...
var ts = DateTime.Now.ToString("yyyy-MM-dd_HH-mm-ss");
GlobalContext.Properties["ts"] = ts;
log4net.Config.XmlConfigurator.Configure();
As mentioned above, every time you change the timestamp, you need to call the Configure() method so it gets picked up in the log name. This could be a bit ugly depending on how your logging code is written.
Refered the post
Why is log4net creating two separate log files when using RollingFileAppender?
I want to know if creation of new log files whe current file exceeds certain size is possible.
Look at RollingFileAppender in the log4net config examples. The example given there does have a max file size, and a new file is generated once the old one hits the cap.
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="log.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="100KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
I wanted to send the current log4net log as an email attachment using System.Net.Mail.Attachment but when I pass in the file path an IOException is thrown.
Attachment mailAttachment = new Attachment(logPath);
The process cannot access the file 'C:\Log\log4net.log' because it is being used by another process
The appender configuration looks like this:
<appender name="RootRollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<param name="File" value="C:\Log\log4net.log" />
<param name="AppendToFile" value="true" />
<param name="MaxSizeRollBackups" value="10" />
<param name="MaximumFileSize" value="10024KB" />
<param name="RollingStyle" value="Size" />
<param name="StaticLogFileName" value="true" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%date [%username|%thread] %-5level %logger: %message%newline" />
</layout>
</appender>
Is there any way to get around this? Can I copy out the log file or somehow release it from the locking process?
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="${TMP}\log-file.txt" />
<appendToFile value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
using <lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> will tell log4net to only lock the file for a brief moment while it is doing the actual writing. There is a slight performance penalty, but allows you to do things such as add it as an attachment a lot easier.
Otherwise log4net will lock the file indefiniately while the process is running.
log4net in my project creates new log file every minute. I would like to have just one file per instance of my application, but every instance that runs should create new log file.
This is from my app.config file:
<appender name="file" type="log4net.Appender.RollingFileAppender">
<file value="C:\\Logs\\log2_"/>
<rollingStyle value="Date"/>
<datePattern value="MMdd_HHmmss.\tx\t"/>
<staticLogFileName value="false"/>
<appendToFile value="true"/>
<maximumFileSize value="500MB"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %-5level %message%newline"/>
</layout>
</appender>
What is the error here?
Your rolling style is set to Date meaning it will rotate on a time based interval. The datePattern element appears to be misused but it set to roll every minute (the ./tx/t) seem extraneous.
From the documentation the following is the example for once per app instance (with a 50G hard limit):
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logfile.txt" />
<appendToFile value="false" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="-1" />
<maximumFileSize value="50GB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
See here for the documentation
exclude dateTime minutes from file layout