ID number and Cell Number validation

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How to validate ID number and cell number in asp.net? i am trying to register users to the system, so i need to check if the ID number is valid. for instance we have 13 digits for id number in South Africa (meaning year first, month second, day in which u were born[meaning 750910- means you were born in 1975 september on the tenth day]) and ten digits for a cell number.

Posted 7-Aug-12 5:30am

Xavi Giqwa

Updated 7-Aug-12 5:44am

v2

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Comments

[no name] 7-Aug-12 11:32am

If you really expect an answer to your quesiton, you are going to have to come up with more information than that. Like what it is that you are trying to do for instance.

ZurdoDev 7-Aug-12 12:13pm

You can use regular expressions, javascript, C#, SQL, etc. You can do client side validation, web service, or in C# postback. It's up to you. But this question is really so vague we can't tell you exactly what to do.

Sergey Alexandrovich Kryukov 7-Aug-12 12:25pm

What is "ID number"? Not ID itself, but its number? :-)
--SA

Xavi Giqwa 7-Aug-12 13:19pm

identity document number

Sergey Alexandrovich Kryukov 7-Aug-12 14:51pm

:-)

2 solutions

Solution 2

Nobody force you to use Regex and nuthing else. First use Regex to make sure all characters are numbers (or apply some other criteria, as required), and then validate that the length of the string is the same as expected, using string.Length.

—SA

Posted 7-Aug-12 9:00am

Sergey Alexandrovich Kryukov

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Xavi Giqwa · Accepted Answer · 2013-03-27T03:41:00

this is how i solved it

C#

//call validation method
if (validate_SA_ID(txtIdNumber.Text) == true)
{
//taking user iput code

}
else if (validate_SA_ID(txtIdNumber.Text) == false)
{
//error msg

}

// validation method
 private bool validate_SA_ID(string id_num)
        {

            if (id_num == "0000000000000")
            {
                return false;
            }
            bool IsValid = false;
            if (id_num.Length == 13)
            {
                int c, odds, result1, result2, result3, dsada;
                odds = 0;
                result2 = 0;
                string evens = &quot;&quot;;
                for (c = 0; c &lt; 12; c++)
                {
                    if (c % 2 == 0)
                        odds += Convert.ToInt32(id_num.Substring(c, 1));
                    else
                        evens += id_num.Substring(c, 1);
                }
                result1 = Convert.ToInt32(evens) * 2;
                string res = result1.ToString();
                int k;
                for (k = 0; k &lt; res.Length; k++)
                {
                    result2 += Convert.ToInt32(res.Substring(k, 1));
                }
                result3 = odds + result2;
                dsada = 10 - result3 % 10;
                if (dsada.ToString().Length == 1)
                {
                    if (Convert.ToInt32(id_num.Substring(12)) == dsada)
                    {
                        IsValid = true;
                    }
                    else
                        IsValid = false;

                }
                else
                {
                    if (dsada.ToString().Substring(1, 1) == id_num.Substring(12, 1))
                    {
                        IsValid = true;
                    }
                    else
                    {
                        IsValid = false;

                    }
                }
            }
            return IsValid;

        }