CODEWITHSUNDEEP
regexasp.net-mvc
Zax
Zax

Reputation: 3010

MVC .net password validation using regular expression

I'm writing a regular expression to validate a password. The conditions are:

  1. Password must contain at least two special characters

  2. Password must be at least eight characters long

  3. Password must be alpha numeric

I'm able to make sure that there are atleast 8 characters, atleast one alphabet, atleast one number and atleast one special character using the below Regular expression:

(?=.*[A-z])(?=.*[0-9])(?=.*?[!@#$%\^&*\(\)\-_+=;:'""\/\[\]{},.<>|`]).{8,32}

Only condition i'm not able to get is there must be atleast two special characters (Above Reg exp is atleast one special characters). Does anyone have any idea on this?

Thanks in advance.

Upvotes: 1

Views: 4863

Answers (1)

Avinash Raj
Avinash Raj

Reputation: 174696

Only condition i'm not able to get is there must be atleast two special characters.

Make it twice by putting the pattern which was present inside the lookahead inside a group and then make it to repeat exactly two times.

^(?=.*[A-Za-z])(?=.*[0-9])(?=(?:.*?[!@#$%\^&*\(\)\-_+=;:'""\/\[\]{},.<>|`]){2}).{8,32}$

If you want to allow atleast 8 characters then you don't need to include 32 inside the range quantifier, just .{8,} would be enough.

Upvotes: 1

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