What is regex code for 10 digit mobile number

Question

1.00/5 (1 vote)

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C#

public static bool hasValidCharforContactNo(string input)
        {
            Regex r = new Regex("^[0-9]{10}$");
            if (r.IsMatch(input))
            {
                return false;
            }

            return true;
        }

What I have tried:

i am trying to use above code but it is not working properly please give me proper code

Posted 19-Sep-18 0:49am

Member 12183079

Updated 19-Sep-18 20:30pm

RickZeeland

v2

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Richard Deeming 20-Sep-18 9:16am

"it is not working properly"
Then explain what you expect it to do, and what it's actually doing.

"please give me proper code"
We can't do that until you explain what you expect the method to do.

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Salman622 · Answer 1 · 2018-09-19T03:01:00

try below code:

Regex: /^(\+\d{1,3}[- ]?)?\d{10}$/
1. ^ start of line
2. A + followed by \d+ followed by a  or - which are optional.
3. Whole point two is optional.
4. Negative lookahead to make sure 0s do not follow.
5. Match \d+ 10 times.
4. Line end.

it will not work for +910000000000

RickZeeland · Answer 2 · 2018-09-19T01:07:00

Here is a site for testing javascript regex expressions, with an example for 10 digits:
RegExr: Learn, Build, & Test RegEx[^]

^((\+|00(\s|\s?\-\s?)?)31(\s|\s?\-\s?)?(\(0\)[\-\s]?)?|0)[1-9]((\s|\s?\-\s?)?[0-9])((\s|\s?-\s?)?[0-9])((\s|\s?-\s?)?[0-9])\s?[0-9]\s?[0-9]\s?[0-9]\s?[0-9]\s?[0-9]$

And another one for 11-12 digit numbers: RegExr: Learn, Build, & Test RegEx[^]

Here is an interesting article by the famous Expresso maker Jim Hollenhorst: The 30 Minute Regex Tutorial[^]

And here is the working code for Dutch phone numbers:

// using System.Text.RegularExpressions;

            string searchPattern = @"^((\+|00(\s|\s?\-\s?)?)31(\s|\s?\-\s?)?(\(0\)[\-\s]?)?|0)[1-9]((\s|\s?\-\s?)?[0-9])((\s|\s?-\s?)?[0-9])((\s|\s?-\s?)?[0-9])\s?[0-9]\s?[0-9]\s?[0-9]\s?[0-9]\s?[0-9]$";
            var match = new Regex(searchPattern).Match(input);
            return (match.Success);

For other numbers, try this:

input = input.Replace("(", string.Empty).Replace(")", string.Empty).Replace("-", string.Empty).Replace(" ", string.Empty).Trim();
return Regex.IsMatch(input, "^[0-9]{10}$");

Patrice T · Answer 3 · 2018-09-19T15:42:00

In order to help us figure out the problem, it is wise to include sample data that match the criteria and that don't.

Just a few interesting links to help building and debugging RegEx.
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[^]

Member 12893295 · Answer 4 · 2018-09-19T20:31:00

Solution 4

public static bool hasValidCharforContactNo(string input)
        {
            Regex r = new Regex(@"^\d{10}$");
            if (r.IsMatch(input))
            {
                return true;
            }else
{
            return false;
}
        }
I hope this will help you...

Posted 19-Sep-18 20:31pm

Member 12893295

Updated 20-Sep-18 3:51am

v2

Comments

Patrice T 20-Sep-18 5:19am

I fear it will not help, the code is wrong.

RickZeeland 20-Sep-18 9:01am

You can update your solution, that's a lot easier to read :)

RickZeeland 20-Sep-18 9:48am

No no, I mean use the "Improve solution" button !

What is regex code for 10 digit mobile number

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