[Last Call] Learn about multicloud storage options and how to improve your company's cloud strategy. Register Now

x
?
Solved

Regular Expression not working

Posted on 2013-01-31
6
Medium Priority
?
305 Views
Last Modified: 2013-02-07
i am using following regular expression validator, but it not working with the date 19-Feb-2013
it is saying invalid date ? But it is validating 19-Feb-2012. Why this issue ? How do i solve ?

/((([0][1-9]|[12][\d])|[3][01])[-\/]((Jan|Mar|May|Jul|Aug|Oct|Dec))[-\/][1-9]\d\d\d)|((([0][1-9]|[12][\d])|[3][0])[-\/]((Jan|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec))[-\/][1-9]\d\d\d)|(([0][1-9]|[12][\d])[-\/]((Feb))[-\/][1-9]\d([02468][048]|[13579][26]))|(([0][1-9]|[12][0-8])[-\/]((Feb))[-\/][1-9]\d\d\d)/i
0
Comment
Question by:Varshini S
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 27

Assisted Solution

by:Shaun Kline
Shaun Kline earned 1002 total points
ID: 38840947
This issue is at the end of the expression:
]))|(([0][1-9]|[12][0-8])[-\/]((Feb))[-\/][1-9]\d\d\d)/i
This allows days of 01-09, 10-18 and 20-28 for non-leap year days in Feb.
Look to change this to [0][1-9]|[1][0-9]|[2][0-8]
0
 
LVL 7

Assisted Solution

by:Beneford
Beneford earned 498 total points
ID: 38840967
re says:
1-31 [Jan|Mar|May|Jul|Aug|Oct|Dec] any year
or
1-30 any month except Feb
or
1-29 Feb any year ending [02468][048] or ending [13579][26]
or
1-28 Feb any year

The problem is the formulation of 1-28 which actually says [12][0-8] which excludes 19.
the 1-28 condition should be
([0][1-9]|[1][0-9]|[2][0-8])

Actually, the formula would probably be better with 1-28 before (just) the 29 Feb logic.
0
 

Author Comment

by:Varshini S
ID: 38841023
Thank you, it is working but if i give the date 29-Feb-2013 - it is not validating. Why ?
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
LVL 27

Accepted Solution

by:
Shaun Kline earned 1002 total points
ID: 38841157
Define "not validating". Do you mean it is allowing that date?
0
 

Expert Comment

by:smokinmark
ID: 38841266
www.regexlib.com

has regular expressions for almost anything.  There is one on there that does exactly what you want.  Look under Date/Time.

Cheers.
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 38841498
Why use a regex for date validation? Why not use a CompareValidator?

e.g.  (http://stackoverflow.com/a/939852/884561)

<asp:CompareValidator
    id="dateValidator" runat="server" 
    Type="Date"
    Operator="DataTypeCheck"
    ControlToValidate="txtDatecompleted" 
    ErrorMessage="Please enter a valid date.">
</asp:CompareValidator>

Open in new window

0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

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

Problem Hi all,    While many today have fast Internet connection, there are many still who do not, or are connecting through devices with a slower connect, so light web pages and fast load times are still popular.    If your ASP.NET page …
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
Visualize your data even better in Access queries. Given a date and a value, this lesson shows how to compare that value with the previous value, calculate the difference, and display a circle if the value is the same, an up triangle if it increased…
In response to a need for security and privacy, and to continue fostering an environment members can turn to for support, solutions, and education, Experts Exchange has created anonymous question capabilities. This new feature is available to our Pr…
Suggested Courses

650 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