I am trying to use log4net with Autofac. I've pasted this code http://autofac.readthedocs.org/en/latest/examples/log4net.html , and from Program.cs/Main() I am doing
var iocBuilder = new ContainerBuilder(); iocBuilder.RegisterModule(new LoggingModule()); var iocContainer = iocBuilder.Build();
now I would like to try this out immediately (in the next line), writing a simple line to the log file. How should I do it?
I am thinking of something like this
var ls = iocContainer.Resolve<LoggingModule>(); ls.Info("the logging is working");
Thanks a lot
To obtain a ILog, log4net need to know the class that use the logger (LogManager.GetLogger(...)). So, you can't resolve a ILog without a parent class. You have to inject the ILog inside a component.
public class MyComponent { public MyComponent(ILog logger) { this._logger = logger; } private readonly ILog _logger; public void Do() { this._logger.Info("Log4net OK"); } } // ... log4net.Config.XmlConfigurator.Configure(); // ... iocBuilder.RegisterModule(new LoggingModule()); iocBuilder.RegisterType<MyComponent>().AsSelf(); // ... MyComponent c = iocContainer.Resolve<MyComponent>(); c.Do();
Another solution would be to register an ILog for Object and resolve ILog. In this case, the module is not required.
log4net.Config.XmlConfigurator.Configure(); /// ... ContainerBuilder cb = new ContainerBuilder() cb.Register(c => LogManager.GetLogger(typeof(Object))).As<ILog>(); IContainer container = cb.Build(); ILog logger = container.Resolve<ILog>(); logger.Info("log4net OK");
