Regex format for XXXXXXXXX , XX-XXXXXXX , XXX-XX-XXXX

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Hi Everyone,

Can anyone please provide me the regex format for the below.

XXXXXXXXX,
XX-XXXXXXX
XXX-XX-XXXX

What I have tried:

i tried the below 
<pre>string pattern1= @"\d{9}|\d{3}-\d{2}-\d{4}|\d{3}-\d{6}|\d{5}-\d{4}";

string pattern2 = @"[1-9]\d{8}|[1-9]\d?-\d{7}";

Posted 13-Mar-19 1:15am

suman palla

Updated 13-Mar-19 1:56am

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Patrice T · Answer 1 · 2019-03-13T01:48:00

Quote:

\d{9}|\d{3}-\d{2}-\d{4}|\d{3}-\d{6}|\d{5}-\d{4}

What is the problem with that regEx?
Advice: use the Debuggex to see a nice graph and test your data.

Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
RegExr: Learn, Build, & Test RegEx[^]
Online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx: Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]
This site also show the Regex in a nice graph but can't test what match the RegEx: Regexper[^]

OriginalGriff · Answer 2 · 2019-03-13T01:56:00

First off, make up your mind what language you are using: a JS solution will not be identical to a Java or C# solution.

Assuming C#, your expression works fine:

string pattern1 = @"\d{9}|\d{3}-\d{2}-\d{4}|\d{3}-\d{6}|\d{5}-\d{4}";
Regex reg = new Regex(pattern1);
if (reg.IsMatch("123456789")) Console.WriteLine("9 OK");
if (reg.IsMatch("123-45-6789")) Console.WriteLine("3-2-4 OK");
if (reg.IsMatch("123-456789")) Console.WriteLine("3-6 OK");
if (reg.IsMatch("12345-6789")) Console.WriteLine("5-4 OK");

Gives:

9 OK
3-2-4 OK
3-6 OK
5-4 OK

The only difference I would make is to add start and end of line characters:

string pattern1 = @"^\d{9}|\d{3}-\d{2}-\d{4}|\d{3}-\d{6}|\d{5}-\d{4}$";
Regex reg = new Regex(pattern1);

So what's the problem with it?

Regex format for XXXXXXXXX , XX-XXXXXXX , XXX-XX-XXXX

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