Credit Card Validator in C#

Credit Card Validator in C#
I needed a credit card validator for a few of my projects. I found a few snippets of code throughout google, but nothing really just giving me what I needed, so I wanted to post my class. Maybe it will help others doing the same thing I did.

public class CardValidator
{
public string CardType { get; private set; }
public bool IsValid { get; private set; }
public string ResultingError { get; private set; }

public string CardNumber { get; set; }
public DateTime CardExpiration { get; set; }

public void Validate()
{
IsValid = false;

if (string.IsNullOrEmpty(CardNumber))
{
ResultingError = "Card number empty....";
return;
}

if (CardNumber.Length > 16)
{
ResultingError = "Card number too long";
return;
}

foreach (char digit in CardNumber)
{
if (!char.IsDigit(digit))
{
ResultingError = "Card number contains invalid characters";
return;
}
}

if (CardExpiration < DateTime.Now)
{
ResultingError = "Card has expired.";
return;
}

int sum = 0;
for (int i = CardNumber.Length - 1; i >= 0; i--)
{
if (i % 2 == CardNumber.Length % 2)
{
int n = int.Parse(CardNumber.Substring(i, 1)) * 2;
sum += (n / 10) + (n % 10);
}
else
{
sum += int.Parse(CardNumber.Substring(i, 1));
}
}

IsValid = (sum % 10 == 0);

if (IsValid == true)
{
switch (CardNumber.Substring(0, 1))
{
case "3":
CardType = "AMEX/Diners Club/JCB";
break;
case "4":
CardType = "VISA";
break;
case "5":
CardType = "MasterCard";
break;
case "6":
CardType = "Discover";
break;
default:
CardType = "Unknown";
break;
}
}
else
{
CardType = "Invalid";
}
}
}

Credits to http://volatile-minds.blogspot.com/2009/11/credit-card-validator-in-c.html

install ubuntu without cd

netboot

install bootp
vim /etc/bootptab

client:\
ha="00:22:15:75:BC:B1":\
ip=192.168.3.107:\
gw=192.168.3.1:\
sm=255.255.255.0:\
td=/: hd=/: bf=pxelinux.0

bootp start file

vDaemon=bootpd
vCd=/var/lib/tftpboot

Start () {
    echo -n "Starting $vDaemon: default current directory is at $vCd ... :"
    /usr/sbin/$vDaemon -d 4 -c $vCd >/tmp/$vDaemon.log 2>/tmp/$vDaemon.err &
    sleep 1
    Status
}

Stop () {
        echo "Stopping $vDaemon ..."
    kill `pidof $vDaemon`
}

Reload () {
    if [ "`pidof $vDaemon`" ] ; then
        echo "Reloading config file for $vDaemon ..."
        kill -HUP "`pidof $vDaemon`"
    fi
    Status
}

Status () {
    vPid="`pidof $vDaemon`"
    if [ "$vPid" ] ; then
        echo "$vDaemon running, pid=$vPid"
    else
        echo "$vDaemon not running"
    fi
}

case "$1" in
    start)      Start ;;
    stop)       Stop ;;
    reload) Reload ;;
    restart) Stop ; sleep 2; Start ;;
    status) Status ;;
    ""|*) echo `basename $0` parameter: start stop status reload or restart ;;
esac