Solved

cfinput reg ex string validation issue with alpha only

Posted on 2008-10-31
4
375 Views
Last Modified: 2013-12-24
<cfinput type="text" name="screenname" id="screenname" validate="regular_expression" pattern="^[a-zA-Z]?$" value="#name#" validateat="onsubmit, onserver" required="yes" size="20" maxlength="20" message="Please use 20 characters or less for your screen name." />

isn't working. I keep getting the javascript to popup even when string is correct. What am I doing wrong?
0
Comment
Question by:asaworker
  • 3
4 Comments
 
LVL 8

Accepted Solution

by:
eszaq earned 500 total points
ID: 22851382
Look at your regex pattern:
^[a-zA-Z]?$

^ denotes start of the string
$ denotes end of the string
? stands for 0 or 1 of characters from accepted range

try to specify length of your string with {min,max}:
^[a-zA-Z]{5,20}$




0
 
LVL 8

Expert Comment

by:eszaq
ID: 22851412
what I actually tried to say by analyzing your regex pattern - the way you wrote it, it would only validate an empy string or one character long string
0
 
LVL 16

Expert Comment

by:duncancumming
ID: 22856096
try pattern="[[:alpha:]]"


0
 
LVL 8

Expert Comment

by:eszaq
ID: 22858149
Of course  [[:alpha:]] can be used - it is an exact equivalent of [a-zA-Z]. But the problem with the code was caused by improper use of ^$? operators. Original regular expression pattern written by asaworker would only match one character long string of alpha characters (or empty string)
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
<cffile cannot delete a file 4 51
Problem to go to page 12 93
CSS HELP 6 88
app server have enough resources... 2 41
Article by: kevp75
Hey folks, 'bout time for me to come around with a little tip. Thanks to IIS 7.5 Extensions and Microsoft (well... really Windows 8, and IIS 8 I guess...), we can now prime our Application Pools, when IIS starts. Now, though it would be nice t…
I spent nearly three days trying to figure out how incorporate OAuth in Coldfusion for the Eventful API. Hopefully, this article will allow Coldfusion Programmers to buzz through the API when they need to. Basically, what this script does is authori…
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question