[英]How to add log4net appender in runtime?
How do I add an extra log appender in runtime?如何在运行时添加额外的日志附加程序? (all pre-existing appenders must keep on working)
(所有预先存在的附加程序必须继续工作)
I'm trying it this way:我正在尝试这种方式:
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。
You should also add the appender to a logger.您还应该将 appender 添加到记录器中。 Take a look here Adding Appenders programmatically
看看这里以编程方式添加 Appenders
If the logger you are using is, for example ILog logger
do:如果您使用的记录器是,例如
ILog logger
请执行以下操作:
((log4net.Repository.Hierarchy.Logger)logger.Logger).AddAppender(appender)
var patternLayout = new log4net.Layout.PatternLayout { ConversionPattern = "%date %level %message%newline" }; patternLayout.ActivateOptions(); var rollingFileAppender = new log4net.Appender.RollingFileAppender { File = "MyApp.log", Layout = patternLayout }; rollingFileAppender.ActivateOptions(); var hierarchy = (log4net.Repository.Hierarchy.Hierarchy)log4net.LogManager.GetRepository(); hierarchy.Root.AddAppender(rollingFileAppender); hierarchy.Root.Level = log4net.Core.Level.All; // Default is Debug log4net.Config.BasicConfigurator.Configure(hierarchy);
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