Best practice for parsing and validating mobile number

Question

I wonder what the best practice for parsing and validating a mobile number before sending a text is. I\'ve got code that works, but I\'d like to find out better ways of doin

Answer 1

public class PhoneNumber
{
    public PhoneNumber(string value)
    {
        if (String.IsNullOrEmpty(value))
            throw new ArgumentNullException("numberString", Properties.Resources.PhoneNumberIsNullOrEmpty);

        var match = new Regex(@"\+(\w+) \((\w+)\) (\w+)", RegexOptions.Compiled).Match(value);
        if (match.Success)
        {
            ushort countryCode = 0;
            ushort localCode = 0;
            int number = 0;

            if (UInt16.TryParse(match.Result("$1"), out countryCode) &&
                UInt16.TryParse(match.Result("$2"), out localCode) &&
                Int32.TryParse(match.Result("$3"), out number))
            {
                this.CountryCode = countryCode;
                this.LocalCode = localCode;
                this.Number = number;
            }
        }
        else
        {
            throw new ArgumentNullException("numberString", Properties.Resources.PhoneNumberInvalid);
        }
    }

    public PhoneNumber(int countryCode, int localCode, int number)
    {
        if (countryCode == 0)
            throw new ArgumentOutOfRangeException("countryCode", Properties.Resources.PhoneNumberIsNullOrEmpty);
        else if (localCode == 0)
            throw new ArgumentOutOfRangeException("localCode", Properties.Resources.PhoneNumberIsNullOrEmpty);
        else if (number == 0)
            throw new ArgumentOutOfRangeException("number", Properties.Resources.PhoneNumberIsNullOrEmpty);

        this.CountryCode = countryCode;
        this.LocalCode = localCode;
        this.Number = number;
    }

    public int CountryCode { get; set; }

    public int LocalCode { get; set; }

    public int Number { get; set; }

    public override string ToString()
    {
        return String.Format(System.Globalization.CultureInfo.CurrentCulture, "+{0} ({1}) {2}", CountryCode, LocalCode, Number);
    }

    public static bool Validate(string value)
    {
        return new Regex(@"\+\w+ \(\w+\) \w+", RegexOptions.Compiled).IsMatch(value);
    }

    public static bool Validate(string countryCode, string localCode, string number, out PhoneNumber phoneNumber)
    {
        var valid = false;
        phoneNumber = null;
        try
        {
            ushort uCountryCode = 0;
            ushort uLocalCode = 0;
            int iNumber = 0;

            // match only if all three numbers have been parsed successfully
            valid = UInt16.TryParse(countryCode, out uCountryCode) &&
                    UInt16.TryParse(localCode, out uLocalCode) &&
                    Int32.TryParse(number, out iNumber);

            if (valid)
                phoneNumber = new PhoneNumber(uCountryCode, uLocalCode, iNumber);
        }
        catch (ArgumentException)
        {
            // still not match
        }
        return valid;
    }
}