Where will log4net create this log file

Question

When I set the file value to logs log-file txt  where exactly will it create this folder   In the  bin directory   My web config looks like this    lt log4net gt       lt appender name  FileAppender  type  log4net Appender FileAppender  gt         lt file value  logs log-file txt    gt         lt appendToFile value  true    gt         lt lockingModel type  log4net Appender FileAppender MinimalLock    gt         lt layout type  log4net Layout PatternLayout  gt           lt conversionPattern value   date   thread   -5level  logger   property NDC   -  message newline    gt         lt  layout gt       lt  appender gt   lt  log4net gt    Is this the correct way to log   ILog logger   LogManager GetLogger typeof CCController    logger Error  Some Page   ex       where ex is the exception instance

User · Answer

If you want your log file to be place at a specified location which will be decided at run time may be your project output directory then you can configure your .config file entry in that way

<file type="log4net.Util.PatternString" value="%property{LogFileName}.txt" />

and then in the code before calling log4net configure, set the new path like below

 log4net.GlobalContext.Properties["LogFileName"] = @"E:\\file1"; //log file path
 log4net.Config.XmlConfigurator.Configure();

How simple is it? :)

User · Answer

it will create the file in the root directory of your project solution   You can specify a location of choice in the web config of your app as follows       lt appender name  RollingLogFileAppender  type  log4net Appender RollingFileAppender  gt         lt file value  c  ServiceLogs Olympus Core log    gt         lt appendToFile value  true    gt         lt rollingStyle value  Date    gt         lt datePattern value   yyyyMMdd log    gt         lt maximumFileSize value  5MB    gt         lt staticLogFileName value  true    gt         lt lockingModel type  log4net Appender RollingFileAppender MinimalLock    gt         lt maxSizeRollBackups value  -1    gt         lt countDirection value  1    gt         lt layout type  log4net Layout PatternLayout  gt           lt conversionPattern value   date  -5level   thread   logger -  message newline exception    gt         lt  layout gt       lt  appender gt    the file tag specifies the location

User · Answer

The file value can either be an absolute path like  c  logs log txt  or a relative path which I believe is relative to the bin directory   As far as implementing it  I usually place the following at the top of any class I plan to log in   private static readonly ILog Log   LogManager GetLogger   MethodBase GetCurrentMethod   DeclaringType     Finally  you can use it like so   Log Debug  This is a DEBUG level message

User · Answer

For the log folder and file stuff  go with  Bens answer   I will comment on the creating log part  though  Imo there is no correct way  When coding loggers manually I do it the way you re doing it   ILog logger   LogManager GetLogger typeof CCController      because it is short and concise    That said  I do not create the logger instances inside the classes these days  I let my IoC container inject it for me

User · Answer

I was developing for  NET core 2 1 using log4net 2 0 8 and found NealWalters code moans about 0 arguments for XmlConfigurator Configure    I found a solution by Matt Watson here          log4net GlobalContext Properties  LogFileName       E   file1     log file path         var logRepository   LogManager GetRepository Assembly GetEntryAssembly             XmlConfigurator Configure logRepository  new FileInfo  log4net config

User · Answer

FileAppender appender   repository GetAppenders   OfType lt FileAppender gt    FirstOrDefault    if  appender    null      logger DebugFormat  log file located at    0    appender File   else     logger Error  Could not locate fileAppender

User · Answer

Log4net is saving into your project folder  Something like   SolutionFolder ProjectFolder bin SolutionConfiguration logs log-file txt   Where    SolutionFolder is where you save your solution ProjectFolder is the folder where your project lives into the solution and SolutionConfiguration is the folder that contais all the binaries of your project  the default is Debug or Release    Hope this helps

User · Answer

I think your sample is saving to your project folders and unless the default iis  or  NET   user has create permission then it won t be able to create the logs folder   I d create the logs folder first and allow the iis user full permission and see if the log file is being created

User · Answer

if you want to choose dynamically the path to the log file use the method written in this link  method to dynamic choose the log file path   if you want you can set the path to where your app EXE file exists like this -   var logFileLocation   System IO Path GetDirectoryName  System Reflection Assembly GetEntryAssembly   Location     and then send this  logFileLocation  to the method written in the link above like this   Initialize logFileLocation     and you are ready to go

[c#] Where will log4net create this log file?

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