Log4Net 的Log文件添加行号

来源：互联网发布：玄机科技工资知乎编辑：程序博客网时间：2024/06/01 15:19

在Log4Net记录log时，需要在log文件中记录当前log的行号，而Log4Net的%Line是输出当前语句所在的行，所以需要扩展Converter和Layout两个类。

以PatternLayout为例说明

新建两个类分别继承 PatternLayoutConverter 和 PatternLayout。两个类的实现如下：

public class LineIndexConvert : PatternLayoutConverter    {        private long index=1L;        protected override void Convert(TextWriter writer, LoggingEvent loggingEvent)        {             writer.Write(index++);        }    }    public class LineIndexLayout : PatternLayout    {        public LineIndexLayout()         {            AddConverter("LineIndex", typeof(LineIndexConvert));        }    }

将代码或配置中的PatternLayout，替换成上面的LineIndexLayout，如在代码中配置如下：

 LineIndexLayout patternLayout = new LineIndexLayout            {                ConversionPattern = "[%LineIndex]%date{yyyy-MM-dd HH:mm:ss.fff} %5level [%4thread] %message"            };            patternLayout.ActivateOptions();

其中的%LineIndex是每次输出的行号，如下

[1]2017-06-19 09:17:33.408 INFO [ 12] -SetWriteCommandObjec
[2]2017-06-19 09:17:33.416 INFO [ 12] -SetWriteCommandObject
[3]2017-06-19 09:17:33.417 INFO [ 12] -SetWriteCommandObject
[4]2017-06-19 09:17:33.419 INFO [ 12] -SetWriteCommandObject
[5]2017-06-19 09:17:33.421 INFO [ 12] -SetWriteCommandObject
[6]2017-06-19 09:17:33.423 INFO [ 12] -SetWriteCommandObject
[7]2017-06-19 09:17:33.425 INFO [ 12] -SetWriteCommandObject
[8]2017-06-19 09:17:33.426 INFO [ 12] -SetWriteCommandObject
[9]2017-06-19 09:17:33.428 INFO [ 12] -SetWriteCommandObject
[10]2017-06-19 09:17:33.430 INFO [ 12] -SetWriteCommandObject
[11]2017-06-19 09:17:33.432 INFO [ 12] -SetWriteCommandObject
[12]2017-06-19 09:17:33.433 INFO [ 12] -SetWriteCommandObject
[13]2017-06-19 09:17:33.435 INFO [ 12] -SetWriteCommandObject
[14]2017-06-19 09:17:33.437 INFO [ 12] -SetWriteCommandObject
[15]2017-06-19 09:17:33.438 INFO [ 12] -SetWriteCommandObject
[16]2017-06-19 09:17:33.440 INFO [ 12] -SetWriteCommandObject
[17]2017-06-19 09:17:33.442 INFO [ 12] -SetWriteCommandObject
[18]2017-06-19 09:17:33.444 INFO [ 12] -SetWriteCommandObject
[19]2017-06-19 09:17:33.445 INFO [ 12] -SetWriteCommandObject

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