Regex for extracting filename from path

Question

I need to extract just the filename (no file extension) from the following path....

\\\\my-local-server\\path\\to\\this_file may_contain-any&character.pdf<

Answer 1

also one more for file in dir and root

   ^(.*\\)?(.*)(\..*)$

for file in dir

Full match  0-17    `\path\to\file.ext`
Group 1.    0-9 `\path\to\`
Group 2.    9-13    `file`
Group 3.    13-17   `.ext`

for file in root

Full match  0-8 `file.ext`
Group 2.    0-4 `file`
Group 3.    4-8 `.ext`