C# automatically substitutes forward-slash with back-slash in path...why?

Question

I have a textbox where I put the name of a file that contains the forward-slash character '/' When I grab the text from the textbox the '/' is automatically replaced with '\' and it obviously can't find the file, for example:

I write C:\Users\Temp\my/file.txt I get C:\Users\Temp\my\file.txt

So, instead of opening "my/file.txt", it searches for a directory "my" which contains "file.txt"

How can I solve this?

Just curious: On what O/S is my/file.txt a valid filename? (I.e. where the / isn't a directory specifier.) — Adrian Mole
– Adrian Mole, Commented Apr 19, 2021 at 12:31
/ is invalid in NTFS file names. It's a directory specifier on Unix, Linux, MacOS. Where did you find a file named my/file.txt in the first place? — Panagiotis Kanavos
– Panagiotis Kanavos, Commented Apr 19, 2021 at 12:41

to6y · Accepted Answer · 2021-04-19 13:17:28Z

2

If you're using Windows (which I assume you are, given the paths in your example), then / is an invalid character for a filename:

The easiest solution here would be to remove the slash from the filename as this is likely to cause further issues down the line.

answered Apr 19, 2021 at 13:17

to6y

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1 Comment

goldonif Over a year ago

I didn't think of that, thanks! I know it seems dumb but I have to make a mod to an app that already works and somehow that didn't came to my mind

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