CODEWITHSUNDEEP
regexasp.net-mvc-4
Rendeep
Rendeep

Reputation: 135

Regular Expression in MVC4

I would like to have a regular expression that allows only letters, numbers and special characters but does not allow numbers, special characters and white space only. I am using this expression below but it is not working. How can I fix Iit?

"^(?=.*\\d)(?=.*[a-zA-Z]).{4,10}$"

For example::

Abc!@#111 - Accept
qwerty         - Accept
111             - dont accept
@#$          - dont accept

Upvotes: 2

Views: 118

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626747

In your regex, letters and digits are both required. Thus, it won't match qwerty.

It seems you just want to make sure there is at least one letter.

If you plan to use server-side validation only, you can use a .NET regex that allows Unicode letter class \P{L} meaning non-letter:

^(?!\P{L}*$)\S{4,10}$

It can be declared as @"^(?!\P{L}*$).{4,10}$".

See demo

If you need to validate strings on the client side or both client and server side, you will need a JS compatible version (but it won't support Unicode):

^(?![^A-Za-z]*$)\S{4,10}$

To check if not only numbres or Special characters are present, we can use a look-ahead (?!\P{L}*$) that requires the use of at least one letter.

Upvotes: 2

Related Questions