Regex to include all special characters

Question

I can't seem to find any suitable answer for this.

I need a regex that will make sure that there is at least one special character, one number, one upper and one lower and at least 8 long.

I have a few here but for some reason, when I add more characters it doesn't recognize them.

ValidationExpression="^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&])[A-Za-z\d$@$!%.*?&]{8,}"

I want to add every single special character.

I don't know if I would make this a regex since any of those characters can appear anywhere in your string, so it's not really a pattern. I would probably just issue separate checks for each requirement of the string to validate. I know it's not a neat little one-liner, but at least it would be readable. — Doug F, Feb 28 '19 at 14:05
Do you mean you want to match any chars but whitespace? Replace `[A-Za-z\d$@$!%.*?&]` with `\S` — Wiktor Stribiżew, Feb 28 '19 at 14:11
I have two input strings and these are checking that at least one of the above characters exist in the input string. But i want to add all of the special characters available to check that at least the user has used at least one of them. — domddidlydom1233, Feb 28 '19 at 14:13
So in essence, i want to add !"£$%^&*()_+{}:@~<>?|-=[];'#,./\ also — domddidlydom1233, Feb 28 '19 at 14:15
Possible duplicate of [Checking strings for a strong enough password](https://stackoverflow.com/questions/12899876/checking-strings-for-a-strong-enough-password) — 41686d6564 stands w. Palestine, Feb 28 '19 at 14:26

score 0 · Answer 1 · answered Feb 28 '19 at 14:19

Please try to avoid long and complex regular expressions, because it would be hard to understand and modify them in future. Instead define a few simple and straightforward Regex, then combine it with c# code

var hasLowercaseChar = new Regex("[a-z]");
var hasUppercaseChar = new Regex("[A-Z]");
var hasDigitChar = new Regex("[0-9]");
var hasSpecialChar = new Regex("\\$!\\^-@%&\\.\\*");

var input = "" // your input string here
var passwordIsValid = hasLowercaseChar.IsMatch(input)
    && hasUppercaseChar.IsMatch(input)
    && hasDigitChar.IsMatch(input)
    && hasSpecialChar.IsMatch(input)
    && input.Length >= 8;

In above example each regular expression is simple and even if you not sure what it should match you can infer this from variable names

Lorenzo Benedetto · Answer 2 · 2019-02-28T14:26:05.497

0

The following regex should do the trick: ^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*\W)[\S]{8,}$

edited Feb 28 '19 at 14:26

answered Feb 28 '19 at 14:20

Lorenzo Benedetto

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score 0 · Answer 3 · answered Feb 28 '19 at 14:31

0

Try Regex: (?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@!%*?&!"£$%^&*()_+{}:@~<>?|=[\];'#,.\/\\-])[A-Za-z\d$@!%*?&!"£$%^&*()_+{}:@~<>?|=[\];'#,.\/\\-]{8,}

Demo

answered Feb 28 '19 at 14:31

Matt.G

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Regex to include all special characters

3 Answers3