Regular Expression to allow no more or less than 21 characters in excel cell using VBA

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Hi,

I want to verify the characters entered in excel sheet' cell using vba. I'm trying this with the pattern "^[a-zA-Z0-9]{21,21}$". I want this to match exactly 21 characters (can be alphanumeric) and no more or less than that. Its working fine when the characters are less than 21 characters but not when they exceed. Please suggest me how could I achieve that.

I appreciate any help.

Thanks in Advance,
Sunny K

Posted 14-Jun-12 20:21pm

Sunny_Kumar_

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ZurdoDev 15-Jun-12 9:09am

You could also loop through each cell and use the LEN() function instead.

Sunny_Kumar_ 16-Jun-12 5:14am

Hi ryanb, thanks for the suggestion. I'm already using this trick, but it's an overhead counting the characters every time if we're using a Regular expression to match. I want a definite solution. Thanks if you may assist me this way :)

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Rick Bassham · Answer 1 · 2012-06-15T10:53:00

Solution 1

I haven't tested it, but trying specifying 21 just once, like so:

^[a-zA-Z0-9]{21}$

Posted 15-Jun-12 10:53am

Rick Bassham

Comments

Sunny_Kumar_ 16-Jun-12 3:35am

Hi Rick, I appreciate your help, but I already have given this a try but this didn't do the trick.

Kenneth Haugland 11-Jul-12 20:05pm

If you want alphanumeric values you should write somthing like this:
^[\w\,]{21}$

I only got matches if it had exactly 21 repititions. I fthis dosent work I would think that you have forgotten to add som of the charecters you search for.