Regular Expression Validator

Question

4.00/5 (1 vote)

See more:

Hi,

I am looking for an exact "dd/mm/yyyy" date validator which also checks for valid dates ex: "31/11/2011" should return an error since Novemeber is only 30 days.

I use the following which validates "dd/mm/yyyy"
([1-9]|0[1-9]|[12][0-9]|3[01])[- /.]([1-9]|0[1-9]|1[012])[- /.][0-9]{4}$

but will not check if the date is invalid like: "31/11/2011"

Posted 23-Mar-11 0:16am

Vartkes Nadjarian

Updated 23-Mar-11 1:45am

Tarun.K.S

v3

Add a Solution

3 solutions

Solution 1

try this,

http://regexlib.com/%28A%28b_oF5NlZP5j35rTxqUpRH2kn5YUcl8OEMIQ-912B-DcvTc--fhIV-O9-Se5C73lrHHnWiiIOMVXDCcFNZM-3_Yqb6FAbVKXA7pggXUEM6i01%29%29/DisplayPatterns.aspx?cattabindex=4&categoryId=5[^]

Posted 23-Mar-11 0:21am

Mahendra.p25

Solution 4

Hi. I found this article for you http://javascript.internet.com/forms/validate-date.html. Vote if it will help you.

Posted 23-Mar-11 1:28am

Pavel Yermalovich

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2011-03-23T00:45:00

There are regexes out there which will do this, (mahen25 has linked to site giving at least one) but the problem is that they are very complex, and not very maintainable.

You might be better off just using DateTime.TryParseExact[^] and using the result that way.

C#

DateTime date;
String myDate = "30/11/2011";
if (DateTime.TryParseExact(myDate, "dd/MM/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out date))
    {
    Console.WriteLine("OK");
    }
else
    {
    Console.WriteLine("Error");
    }
String myWrongDate = "31/11/2011";
if (DateTime.TryParseExact(myWrongDate, "dd/MM/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out date))
    {
    Console.WriteLine("OK");
    }
else
    {
    Console.WriteLine("Error");
    }