Need regular expression

Question

Dear All I need regular expression for validating same in textbox minLength: 8, maxLength: 16, upperCase: 0, numbers: 1, lowease:2 , specialChars:Not allowed Symbols:Not Allowed

Vulpes · Answer

OK, try this: string regExp = @"^(?=.*\d.*?\d)(?=.*[a-z].*?[a-z])([a-zA-z0-9^${}[().*+?| &]|]|-|\){8,16}$";

Vulpes · Answer

I'd try breaking it down to see if you can figure out what is stopping it workly correctly in IE. See if this will work for starters and, if it does, add successive special characters between the [..] until it stops working: var expr = /^(?=.*\d.*?\d)(?=.*[a-z].*?[a-z])[a-zA-z0-9]{8,16}$/

Mayur Gujrathi · Answer

Still it is not running in ie i need it in ie...running fine in other browsers

Vulpes · Answer

There must be some difference between the JavaScript regular expression engines for those browsers. You could try rearranging the regular expression to see if IE will then give the correct results. Previously, to avoid any confusion, I left the special characters ], - and \ out of the list of characters within the [...] and OR'ed them with the list instead. I'd try bringing them within the [...] in 'escaped' form: var expr = /^(?=.*\d.*?\d)(?=.*[a-z].*?[a-z])[a-zA-z0-9^${}[().*+?| &\\]\-]{8,16}$/

Mayur Gujrathi · Answer

You are right it not running in ie but running fine in mozila

Vulpes · Answer

Well, to make sure there's no mistake, I've copied it back into my file exactly as you have it but the alert box is showing OK as it should do. It's just the same whether I run the JavaScript from the command line or within my browser (Google Chrome) so I'm at a loss to explain why it's not working for you. As it's unlikely now that anyone else will reply to this thread, all I can suggest is that you start a new thread and see if someone else can come up with a different regular expression that does work correctly for you.

Mayur Gujrathi · Answer

I am not getting why same is not validating on my side it is giving message not ok function passwordChanged() { var text = "mm33mm33"; var expr = /^(?=.*\d.*?\d)(?=.*[a-z].*?[a-z])([a-zA-z0-9^${}[().*+?| &]|]|-|\){8,16}$/ if(expr.test(text)) { alert("OK"); return false; } else { alert("Not OK") } } Type Password Type Password

Vulpes · Answer

This JavaScript is validating OK for me: var text = "mm33mm33"; var expr = /^(?=.*\d.*?\d)(?=.*[a-z].*?[a-z])([a-zA-z0-9^${}[().*+?| &]|]|-|\){8,16}$/ if(expr.test(text)) WScript.Echo("OK"); else WScript.Echo("Not OK")

Mayur Gujrathi · Answer

Thanks vuples for replying But it is still having one problem It is validating on 10 characters If i am entering mm33mm33 then it is not validating here i have to put 2 more alphabets

Vulpes · Answer

I don't think you've got the regular expression quite right. Try replacing this line: var last = new RegExp("^(?=.*\d.*?\d)(?=.*[a-z].*?[a-z])([a-zA-z0-9^${}[().*+?| &]|]|-|\){8,16}$)"); with this: var last = /^(?=.*\d.*?\d)(?=.*[a-z].*?[a-z])([a-zA-z0-9^${}[().*+?| &]|]|-|\){8,16}$/

Mayur Gujrathi · Answer

Dear Vulpes please reply

Mayur Gujrathi · Answer

Dear Vuple it is validating only letter 'd'

Mayur Gujrathi · Answer

Dear Vuples As soon as I am giving i/p like any 2 small case characters first in textbox it is validating function passwordChanged() { var strength = document.getElementById('strength'); var last = new RegExp("^(?=.*\d.*?\d)(?=.*[a-z].*?[a-z])([a-zA-z0-9^${}[().*+?| &]|]|-|\){8,16}$)"); var pwd = document.getElementById("pwdPassword"); if (pwd.value.length==0) { strength.innerHTML = 'Type Password'; } else if (last.test(pwd.value)) { strength.innerHTML = ' Strong! '; } else { strength.innerHTML = ' Weak! '; } } it should not validate until and unless there are 2 small case letters and 2 numbers in textbox

Mayur Gujrathi · Answer

Thanks vuples

Vulpes · Answer

All those strings are invalid as they have less than 8 characters.

Mayur Gujrathi · Answer

No vuples it is not working as soon as i enter dddd or 12ss it is passing validations or ss or 33 my java script function function passwordChanged() { var strength = document.getElementById('strength'); var last = new RegExp("^(?=.*\d.*?\d)(?=.*[a-z].*?[a-z])([a-zA-z0-9^${}[().*+?| &]|]|-|\){8,16}$)"); var pwd = document.getElementById("pwdPassword"); if (pwd.value.length==0) { strength.innerHTML = 'Type Password'; } else if (last.test(pwd.value)) { strength.innerHTML = ' Medium! '; } else { strength.innerHTML = ' Weak! '; } }

Mayur Gujrathi · Answer

Yes Sir Exactly

Vulpes · Answer

When you say 'special characters', do you mean the Regular expression 'metacharacters' which are listed in the link below? http://www.fon.hum.uva.nl/praat/manual/Regular_expressions_1__Special_characters.html

Mayur Gujrathi · Answer

Thanks Vuples for your reply My req is change, sorry for the same I need exactly 2 small case characters more than 2 allowed 2 digits exactly more than 2 allowed Allow special characters

Vulpes · Answer

When you say that no special characters or symbols are allowed, I assume you mean that only a-z, A-Z and 0-9 are allowed. When you also give a quantity for upper case, lower case and numbers, I assume that those quantities are minima as otherwise there's no way they will add up to a minimum of 8. Subject to those assumptions, try this: string regExp = @"^(?=.*\d)(?=.*[a-z].*?[a-z])[a-zA-z0-9]{8,16}$";

Need regular expression

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