文件路径或路径的正则表达式或正则表达式可以是什么？

Question

I am new to this. Please can anyone tell me what can be the regular expression for file path or any path:

Ex => "C:\\\\Users\\\\1700000\\\\Downloads\\\\BackendApp\\\\WebApplication\\\\WebAPI_APPL\\\\Data\\\\1\\\\FirstFol\\\\SecondFodler\\\\MainFolder\\\\File.xlsx"

or

"C:\\\\Users\\\\1700000\\\\Downloads\\\\BackendApp\\\\WebApplication\\\\WebAPI_APPL\\\\Data\\\\1\\\\FirstFol\\\\SecondFodler\\\\MainFolder"

File path or path can be small or big , it is not fixed. Path should start with "C(any drive):\\" Please let me know what can I use also the expression should consider double backslash in it.

This expressions didn't work

1. @"^(?:[\w]\:|\\\\)(\\\\[a-z_\-\s0-9\.]+)+\.(txt|gif|pdf|doc|docx|xls|xlsx)$"
2. @"^(?:[a-zA-Z]\:|\\\\\\\\[\w\.]+\\\\[\w.$]+)\\\\(?:[\w]+\\\\)*\w([\w.])+$"

Answer 1

Try this one:

^(?:[\w]:|\\)([A-Za-z_\s0-9.-\\]+)\.(txt|gif|pdf|docx|doc|xlsx|xls)$

you could use https://regex101.com/ to try yours regex

Answer 2

Here's one i've used in the past for unix based systems

(\/)((\w|-|_|[0-9])*\/(\w|-|_|[0-9])*)+[^.*\.]

For windows it will be essentially the same + detecting drive letter:

([A-Z]{1}:)(\/)((\w|-|_|[0-9])*\/(\w|-|_|[0-9])*)+[^.*\.]*

With backslashes:

([A-Z]{1}:)(\\\\)((\w|-|_|[0-9])*\\\\(\w|-|_|[0-9])*)+[^.*\.]*

When I used it I expected my strings to be paths only. It may capture text after a path so it's not perfect. But I hope this helps.