在Common.Logging中配置布局

Question

我目前正在使用Common.Logging和log4net。我已经实现了一个自定义的附录。

我试图将下面代码中指定的布局添加到我的日志中。但是当我在我的自定义附录中打印函数RenderLoggingEvent(loggingEvent)时，我只得到消息(但是没有时间戳，.)。

// create properties
// EXTERNAL expects log4net being configured somewhere else in
// your code and does nothing.
NameValueCollection properties = new NameValueCollection();
properties["configType"] = "EXTERNAL";

// set Adapter
Common.Logging.LogManager.Adapter = 
    new Common.Logging.Log4Net.Log4NetLoggerFactoryAdapter(properties);

// create an object of the custom appender
var appender = new SimpleAppender();
appender.Name = "SimpleAppender";

// add layout to the appender
var layout = new log4net.Layout.PatternLayout()
{
    ConversionPattern = 
        "%date [%thread] %-5level %logger %ndc - %message%newline"
};
appender.Layout = layout;

//Let log4net configure itself based on the values provided
appender.ActivateOptions();
log4net.Config.BasicConfigurator.Configure(appender);

如果我在App.config文件中添加配置，它就能工作。但我需要一个基于代码的配置..。

Answer 1

您需要对布局和附录调用ActivateOptions：

var layout = new log4net.Layout.PatternLayout()
{
    ConversionPattern = 
        "%date [%thread] %-5level %logger %ndc - %message%newline"
};

layout.ActivateOptions();
appender.Layout = layout;

样本输出：

2014-03-26 20:29:49,816 [1] DEBUG test logger (null) - log test