驗證的範例

public static bool CheckIDNO(string id)
{
    int[] seed = new int[10];       //除了檢查碼外每個數字的存放空間 

    string[] charMapping = new string[] { "A", "B", "C", "D", "E", "F", "G", "H", "J", "K", "L", "M", "N", "P", "Q", "R", "S", "T", "U", "V", "X", "Y", "W", "Z", "I", "O" };

    //A=10 B=11 C=12 D=13 E=14 F=15 G=16 H=17 J=18 K=19 L=20 M=21 N=22 

    //P=23 Q=24 R=25 S=26 T=27 U=28 V=29 X=30 Y=31 W=32  Z=33 I=34 O=35 

    string target = id.Substring(0, 1);
    for (int index = 0; index < charMapping.Length; index++)
    {
        if (charMapping[index] == target)
        {
            index += 10;
            seed[0] = index / 10;       //10進制的高位元放入存放空間 
            seed[1] = (index % 10) * 9; //10進制的低位元*9後放入存放空間 
            break;
        }
    }
    for (int index = 2; index < 10; index++)
    {   //將剩餘數字乘上權數後放入存放空間 
        seed[index] = Convert.ToInt32(id.Substring(index - 1, 1)) * (10 - index);
    }
    //檢查是否符合檢查規則，10減存放空間所有數字和除以10的餘數的個位數字是否等於檢查碼 
    //(10 - ((seed[0] + .... + seed[9]) % 10)) % 10 == 身分證字號的最後一碼 
    return (10 - (seed.Sum() % 10)) % 10 == Convert.ToInt32(id.Substring(9, 1));
}

private bool CheckCompanyN(string CompanyId)
{
    int[] Logic = new int[] { 1, 2, 1, 2, 1, 2, 4, 1 };
    int addition, sum = 0, j = 0, x;
    for (x = 0; x < Logic.Length; x++)
    {
        int no = Convert.ToInt32(CompanyId.Substring(x, 1));
        j = no * Logic[x];
        addition = ((j / 10) + (j % 10));
        sum += addition;
    }
    if (sum % 10 == 0)
    {
        return true;
    }
    if (CompanyId.Substring(6, 1) == "7")
    {
        if (sum % 10 == 9)
        {
            return true;
        }
    }
    return false;
}

public const string RegExString = @"^((([A-Za-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([A-Za-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([A-Za-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([A-Za-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([A-Za-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([A-Za-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([A-Za-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([A-Za-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([A-Za-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([A-Za-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$";

public const string RegExString = @"[0-9\#\+\-\(\)]";