身份证验证

 

private bool CheckCardId(string id)

        {

            int[] wQuan = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 };

            string checkWei = "10X98765432";

            string number17 = id.Substring(0, 17);

            string number18 = id.Substring(17);

            int sum = 0;

            for (int i = 0; i < 17; i++)

            {

                sum = sum + Convert.ToInt32(number17[i].ToString()) * wQuan[i];

            }

            int mod = sum % 11;

            string result = checkWei[mod].ToString();

            if (number18.Equals(result, StringComparison.OrdinalIgnoreCase))

            {

                return true;

            }

            else

            {

                return false;

            }