log4net

Log4net rolling daily filename with date in the file name

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<appender name=”RollingLogFileAppender” type=”log4net.Appender.RollingFileAppender”> <lockingModel type=”log4net.Appender.FileAppender+MinimalLock”/> <file value=”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>

log4net hierarchy and logging levels

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This might help to understand what is recorded at what level Loggers may be assigned levels. Levels are instances of the log4net.Core.Level class. The following levels are defined in order of increasing severity – Log Level. Number of levels recorded for each setting level: ALL DEBUG INFO WARN ERROR FATAL OFF •All •DEBUG •DEBUG •INFO … Read more

Configure Log4net to write to multiple files

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These answers were helpful, but I wanted to share my answer with both the app.config part and the c# code part, so there is less guessing for the next person. <log4net> <appender name=”SomeName” type=”log4net.Appender.RollingFileAppender”> <file value=”c:/Console.txt” /> <appendToFile value=”true” /> <rollingStyle value=”Composite” /> <datePattern value=”yyyyMMdd” /> <maxSizeRollBackups value=”10″ /> <maximumFileSize value=”1MB” /> </appender> <appender name=”Summary” … Read more

Can you configure log4net in code instead of using a config file?

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FINAL SOLUTION:1 For anyone who may stumble upon this in the future, here is what I did. I made the static class below: using log4net; using log4net.Repository.Hierarchy; using log4net.Core; using log4net.Appender; using log4net.Layout; namespace Spectrum.Logging { public class Logger { public static void Setup() { Hierarchy hierarchy = (Hierarchy)LogManager.GetRepository(); PatternLayout patternLayout = new PatternLayout(); patternLayout.ConversionPattern … Read more

How to track down log4net problems

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First you have to set this value on the application configuration file: <configuration> <appSettings> <add key=”log4net.Internal.Debug” value=”true”/> </appSettings> </configuration> Then, to determine the file in which you want to save the output you can add the following code in the same .config file: <configuration> … <system.diagnostics> <trace autoflush=”true”> <listeners> <add name=”textWriterTraceListener” type=”System.Diagnostics.TextWriterTraceListener” initializeData=”C:\tmp\log4net.txt” /> </listeners> … Read more

log4net vs. Nlog

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I was recently tasked to “prototype up some loggin’” for an upcoming project. I didn’t have any logging framework experience. I researched, ran through tutorials, made toy apps, etc. on Log4Net, NLog, and Enterprise Library for a few days. Came back 3-4 weeks later and put them together into a cohesive demo. Hopefully some of … Read more

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