Over the years I’ve Googled and Googled for a solution to this. Heck I even tried Bing! Finally time + an urgent need permitted figuring out a simple solution. To filter down to one thread using Notepad++:

  • Copy the angle brackets and thread number to clipboard. E.g. “[12]”
  • Menu -> TextFX Viz -> Hide Lines without (Clipboard) text
  • Press Ctrl-A (Select all text)
  • Menu -> TextFX Viz -> Delete Invisible Selection
  • Press Ctrl-A (Select all text)
  • Menu -> TextFX Edit -> Delete Blank Lines
  • That’s it! You are now viewing one logging from only one Thread
This works very quickly even with 70,000+ line 10MByte log files. IMO it avoids the need for xml log4net logging and Chainsaw (or similar).Simpler is always better.

Demo: Two threads counting to 100:

Copy the angle brackets and thread number to clipboard. E.g. “[12]”

Menu -> TextFX Viz -> Hide Lines without (Clipboard) text

Press Ctrl-A (Select all text)

Menu -> TextFX Viz -> Delete Invisible Selection

Press Ctrl-A (Select all text)

Menu -> TextFX Edit -> Delete Blank Lines

That’s it! You are now viewing one logging from only one Thread