C# 如何在运行时添加 log4net appender？
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How to add log4net appender in runtime?
提问by Steve Kero
How do I add an extra log appender in runtime? (all pre-existing appenders must keep on working)
I'm trying it this way:
如何在运行时添加额外的日志附加程序？（所有预先存在的附加程序必须继续工作）
我正在尝试这样：
var layout = new PatternLayout("%utcdate %-5level - %message%newline");
layout.ActivateOptions();
_log4netAppender = new FileAppender
{
Layout = layout,
File = logFilePath,
};
_log4netAppender.ActivateOptions();
BasicConfigurator.Configure(_log4netAppender);
but it doesn't write anything to the file.
但它不会向文件写入任何内容。
采纳答案by Salvatore Sorbello
You should also add the appender to a logger. Take a look here Adding Appenders programmatically
您还应该将 appender 添加到记录器中。看看这里以编程方式添加 Appenders
If the logger you are using is, for example ILog loggerdo:
例如，如果您使用的记录器是ILog logger：
((log4net.Repository.Hierarchy.Logger)logger.Logger).AddAppender(appender)
((log4net.Repository.Hierarchy.Logger)logger.Logger).AddAppender(appender)
