I want my logfile to look something like this:
2009-02-13.log
but the problem is that I can't seem to find any way to add the .log extension.
I've tried a lot of things but nothing helps.
This is what I have this far:
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="Logs/Log4Net/.log"/>
<appendToFile value="true"/>
<rollingStyle value="Date"/>
<datePattern value="yyyy-MM-dd" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline"/>
</layout>
</appender>
The other answers escape the "g" in "log" since "g" is a special character in datePattern. This isn't wrong, but I prefer to wrap the entire set of non-date characters in single quotes, like so:
<datePattern value="yyyy-MM-dd'.log'" />
This gives the same results, but is easier for me to manage. This way, I don't have to recall which specific characters are special for datePattern (the list is long and varied). If I forget one character then I don't run the risk of borking my file names; they're all nicely escaped en masse.
Try adding the .log extension to your date pattern like so and remove it from the file attribute.
<datePattern value="yyyy-MM-dd.lo\g"/>
...
<staticLogFileName value="false" />
log4net now also provides a PreserveLogFileNameExtension property that can force your .log extension to the end of the compound file name (including date pattern and/or size sequence number):
<file value="LogFiles/.log"/>
<preserveLogFileNameExtension value="true" />
<datePattern value="yyyy-MM-dd" />
add ".lo\g" to the end of your datepattern
This is my log file xml config.
The path to the log file is in the "file" tag
This will create a log file "2012-11-22.log" under the folder "LogFiles" in the route folder of my website.
NOTE: Make sure that the folder exists first!
<?xml version="1.0"?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<log4net>
<root>
<level value="INFO"/>
<appender-ref ref="RollingFileAppender"/>
</root>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="LogFiles/"/>
<appendToFile value="true"/>
<rollingStyle value="Date"/>
<maxSizeRollBackups value="5"/>
<maximumFileSize value="10MB"/>
<datePattern value="yyyy-MM-dd'.log'" />
<staticLogFileName value="false"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline%exception"/>
</layout>
</appender>
</log4net>
</configuration>
Related
I want log files to be written to a directory where log files are kept. I'm using a RollingFileAppender with a datePattern. Here is what I have that doesn't work:
<?xml version="1.0" encoding="utf-8"?>
<log4net>
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="x:\Logs\log" />
<immediateFlush value="true" />
<appendToFile value="true" />
<datePattern value="yyyyMMdd"/>
<maximumFileSize value="10MB" />
<maxSizeRollBackups value="5" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %level %thread %logger - %message%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingFile" />
</root>
</log4net>
I'm hoping this will result in something like:
x:\Logs\log-20211026.log
Instead I get
x:\Logs\log
Examples that I've seen use no path, e.g.:
<file value="log">
<datePattern value="yyyyMMdd"/>
Is there a way to have the data pattern, and an absolute path, and ".log" at the end?
Someone at my work had the answer:
The file name should contain the extention and 2 additional properties need to be set:
<file value="x:\Logs\log.log"/>
<preserveLogFileNameExtention value="true"/>
<staticLogFileName value="false"/>
I am using the RollingLogFileAppender and it works great and it's rolling over into new files. But it's adding the .1, .2, etc at the very end of the file. So I end up with .log.1, .log.2, etc. So every file technically has a new extension that explorer doesn't know, so I can't just double click on a file to open.
How can I get the rolling file appender to insert that index BEFORE the file extension?
What I want is
.1.log
.2.log
Bonus would be for the current file to always be .0.log, that way they always sort correctly in explorer.
EDIT: added my current config settings
<log4net>
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
<file value="App_Data\\Logs\\" />
<datePattern value="dd.MM.yyyy'.log'" />
<staticLogFileName value="false" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="5MB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<logger name="File">
<level value="All" />
<appender-ref ref="RollingLogFileAppender" />
</logger>
</log4net>
You just need to use the PreserveLogFileNameExtension property on the RollingFileAppender.
See the following questions:
Log4net appender filename issue
Log4net RollingFileAppender Size rollingStyle file extension
I have this as my config file:
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
</configSections>
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="c:\\logging\\EwsSearch.log" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="-1" />
<maximumFileSize value="100KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
</log4net>
<root>
<level value="ERROR" />
<appender-ref ref="RollingFileAppender" />
</root>
</configuration>
I then have in my C# code:
public class VsiEWSSearch
{
private static readonly ILog logger = LogManager.GetLogger(typeof(VsiEWSSearch));
public EWSResponse PdeProcessInquiry(int BusinessLineCode, int ClientCaseId, string callingApp)
{
XmlConfigurator.Configure(new System.IO.FileInfo("VSI.EWSSearch.config"));
logger.Error("This is an error");
No log file is produced even though I have adjusted permissions for the directory. What's wrong?
The root node has to be inside the log4net node. Depending on the type of configuration file you need to make some further adjustments:
If you have a standalone config file for log4net then you need to remove the configuration and configSections node. I also think that log4net is not going to find you configuration file unless you specify the full path (you can of course do that without hard-coding any path in your application).
If you are simply using app.config then you do not need further modifications, but you need to call the XmlConfigurator.Configure() method without any argument.
Note: You should call the XmlConfigurator.Configure() method only once in your application.
I got this:
<appender name="iOsClients_Error" type="log4net.Appender.RollingFileAppender">
<file value="Logs/errors/error_"/>
<appendToFile value="true"/>
<rollingStyle value="Date"/>
<datePattern value="yyyyMMdd" />
<staticLogFileName value="false"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%newline%newline%date [%thread] %-5level - %message%newline%newline%exception%newline%newline"/>
</layout>
</appender>
This will create a log file like: error_20110801
How can I get log4net to output text files or how can I get log4net to add the .txt file extension to these files?
I want this: error_20110801.txt
You can use something like this to accomplish that:
<file type="log4net.Util.PatternString" value="Logs/errors/error_%date{yyyyMMdd}.txt" />
They key here is to use the PatternString
The problem with
<file type="log4net.Util.PatternString" value="Logs/errors/error_%date{yyyyMMdd}.txt" />
is that if the server doesn't restart every day, the file will have the same date, so the same name. And the archived file will be like error_20130101.txt20130101 .
The solution to this is here actually : Setting a log file name to include current date in Log4j
I need my application to create a log file each time it runs.
My preferred format would be App.log.yyyy-MM-dd_HH-mm-ss. If that's not possible, I'd settle for App.log.yyyy-MM-dd.counter
This is my current appender configuration:
<appender name="File" type="log4net.Appender.RollingFileAppender">
<file value="App.log"/>
<rollingStyle value="Date"/>
<datePattern value=".yyyy-MM-dd_HH-mm-ss"/>
<staticLogFileName value="false"/>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
</appender>
But it creates a random number of files based on the date and time.
I assume that the application should create only one log file every time it runs, so you do not need a rolling file appender (though my solution would apply for rolling file appenders as well):
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file type="log4net.Util.PatternString" value="c:\temp\App-%date{yyyy-MM-dd_HH-mm-ss}.log" />
<appendToFile value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%2thread] %-5level - %message%newline" />
</layout>
</appender>
(Obviously you can use other your own layout and other settings for the file appender.)
Also note that you can set your rolling style as
rollingstyle="Once"
and it will create a new file every time it is run. If staticLogFileName is set to true (e.g., logname.log) the previous logs will be set to logname.log.1, logname.log.2, etc.
The number of files kept before overwriting the oldest (say, 10) can be controlled by setting
maxSizeRollBackups="10"
Edit:
My config, which creates a datestamped log per execution (unless one exists, in which case it follows the .1 rule, looks like this:
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="Logs\MyLog-%date{dd-MM-yyyy}.log" />
<appendToFile value="false" />
<maxSizeRollBackups value="-1" /> <!--infinite-->
<staticLogFileName value="true" />
<rollingStyle value="Once" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%-5level %date [%thread] %c{1} - %m%n" />
</layout>
</appender>
Not 100% sure if I need appendToFile="false" as the docs say that's done automatically when you use rollingStyle="Once", but this makes it clearer in any case.
It's documented from apache in the log4net docs at:
https://logging.apache.org/log4net/release/config-examples.html
ctrl+f for "per program execution"
<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>