Logging SQL exceptions from database using log4net

Question

I have a wcf service which calls a stored procedure in sql database. I use log4net for logging purpose.

If any sql exception is thrown from the database, I can get the sql exception properties like procedure name, error line, severity etc., from the exception object in the service.

But is there a way to directly log those properties in a file using log4net?.

Answer 1

Follow these steps:

1. Add reference to log4net dll
2. Import the following namespaces using log4net; using log4net.Config;

3. Add the following code to global declaring

    private static readonly ILog log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); 

4. Add this code to your constructor

    XmlConfigurator.Configure(new FileInfo(AppDomain.CurrentDomain.BaseDirectory + @"\\Config\\Log4Net.config")); 

5. Copy the following to your config file under configuration tag

 <configSections> section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" /> </configSections> <log4net debug="true"> <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender"> <file value="C:\\\\Temp\\\\errLog.txt" /> <appendToFile value="true" /> <rollingStyle value="Size" /> <maxSizeRollBackups value="10" /> <maximumFileSize value="10MB" /> <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" /> <level value= "ERROR" /> <appender-ref ref="RollingLogFileAppender" /> </root> </log4net> 

6. in the try...catch(Exception ex) add the following line

    log.Error(ex)