CODEWITHSUNDEEP
c#asp.net
Chiranjeevi
Chiranjeevi

Reputation: 171

How to convert Mobile number to international format in C#

I have to convert mobile number to International format.

ex: if user enters the number in below format:

0274 123 4567(Newzeland)
09916123764(India)

Conversion should happen 

+642741234567 (Newzeland)
+919916123764 (India)

Tried with lots of regular expressions, but just these are validating, but replace is not happening.

Found some similar link in Stack overflow, but it's in Python.

Formatting a mobile number to international format

For normal mobile validation i am using below code.

protected bool IsValidPhone(string strPhoneInput)
{
    // Remove symbols (dash, space and parentheses, etc.)
    string strPhone = Regex.Replace(strPhoneInput, @"[- ()\*\!]", String.Empty);

    // Check for exactly 10 numbers left over
    Regex regTenDigits = new Regex(@"^([0|\+[0-9]{1,5})?([7-9][0-9]{9})$");
    Match matTenDigits = regTenDigits.Match(strPhone);

    return matTenDigits.Success;
}

Could any body tell us how to convert this into C#.

Upvotes: 7

Views: 15192

Answers (3)

Anton Minchenko
Anton Minchenko

Reputation: 461

farlee2121's answer is deprecated. Now when using the libphonenumber-csharp package your task should be done this way:

string phoneNumber = Console.ReadLine();
PhoneNumber pn = PhoneNumberUtil.GetInstance().Parse(phoneNumber, "US");
string internationalPhoneNumber = PhoneNumberUtil.GetInstance().Format(pn, PhoneNumberFormat.INTERNATIONAL);

Upvotes: 10

farlee2121
farlee2121

Reputation: 3337

For posterity's sake, here is a c# port of Google's LibPhoneNumber (official repository). The library provides a variety of methods for validating and formatting phone numbers.

https://www.nuget.org/packages/libphonenumber-csharp/

An example with this library.

string localPhoneNumber = "(555) 555-5555"
PhoneNumber pn = PhoneNumberUtil.Instance.Parse(localPhoneNumber, "US");
string internationalPhoneNumber = pn.Format(PhoneNumberUtil.PhoneNumberFormat.INTERNATIONAL);
//result +1-555-555-5555

Upvotes: 13

Chiranjeevi
Chiranjeevi

Reputation: 171

Thanks for the suggestions, i will check with service team regarding country codes. but just for stub creation i used the below code which is manageable.

private string IsMobileNumberValid(string mobileNumber) {

        // remove all non-numeric characters
        string _mobileNumber = CleanNumber(mobileNumber);

        // trim any leading zeros
        _mobileNumber = _mobileNumber.TrimStart(new char[] { '0' });

        // check for this in case they've entered 44 (0)xxxxxxxxx or similar
        if (_mobileNumber.StartsWith("+640"))
        {
            _mobileNumber = _mobileNumber.Remove(2, 1);
        }

        // add country code if they haven't entered it
        //If we need to handle with multiple Country codes we have to place a list here,Currently added +64 as per document.
        if (!_mobileNumber.StartsWith("+64"))
        {
            _mobileNumber = "+64" + _mobileNumber;
        }

        // check if it's the right length
        if (_mobileNumber.Length != 12)
        {
            return _mobileNumber;
        }

        return _mobileNumber;
    }

    public string CleanNumber(string phone)
    {
        Regex digitsOnly = new Regex(@"[^\d]");
        return digitsOnly.Replace(phone, "");
    }

Upvotes: -2

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