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附加程序。

我正在尝试将下面代码中指定的布局添加到我的日志中。但是当我在自定义附加程序中打印函数 RenderLoggingEvent(loggingEvent) 时，我只收到消息（但没有时间戳，...）。

// 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，它就可以工作。但我需要一个基于代码的配置...

Answer 1

您需要在布局和附加程序上调用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