CODEWITHSUNDEEP
character-encodingvisual-studio-2022
Pierre-olivier Dubois-Nadeau
Pierre-olivier Dubois-Nadeau

Reputation: 507

invisible characters UTF-8 visual studio 2022

i don't see invisble characters in visual studio 2022 and i don't know why.

to realize it, I had to copy the line to notepad ++ and change the encoding to ANSI. The line is :

@Html.TextAreaFor(m => m.Notes, new {​​​​​​​​ @class = "form-control", @style = "min-height:6em; resize:vertical;" }​​​​​​​​)

If you change you're encodage to UTF-8, u will see invisble characters.how is this possible, normally we go to utf-8 to see the invisible characters?

The line in UTF8

@Html.TextAreaFor(m => m.Notes, new {​​​​​​​​ @class = "form-control", @style = "min-height:6em; resize:vertical;" }​​​​​​​​)

how can i see his characters in visual studio?

Thank you !

Upvotes: 1

Views: 2018

Answers (2)

Philippe
Philippe

Reputation: 1823

You can use this Visual Studio extension to see the invisible characters in your code.

https://marketplace.visualstudio.com/items?itemName=ShaneRay.InvisibleCharacterVisualizer

Example

Upvotes: 1

Giacomo Catenazzi
Giacomo Catenazzi

Reputation: 9523

I assume that for ANSI, you mean cp1252.

The text ​ in cp1252 is equivalent of the character U+200B in UTF-8, which it is the character for "ZERO WIDTH SPACE".

Such characters should be avoided in source code (but eventually on inline documentation). Usually the origin is a copy/paste from a website, where some hidden spaces are inserted in place of tags (e.g. to change font or colour). I consider this as a bug of such web-site, but also of the code copied. Note: maybe there is an other origin of such text (but a repeated sequence usually hints at such copy/paste errors).

Note: to me, it doesn't seem malicious use of Unicode characters (see recent CVEs for such malicious use on codes), but because these recent CVEs, I really recommend to remove such characters.

For more information, you can check https://en.wikipedia.org/wiki/Zero-width_space (for this character), and a list of other white spaces (and zero width spaces) in https://en.wikipedia.org/wiki/Whitespace_character.

Upvotes: 1

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