static void Main(string[] args)
{
IIN iins = new IIN();
while (true)
{
// Get the card number from the user.
Console.Write("Enter a card number (press Q to quit) : ");
string cardNumber = Console.ReadLine();
// Do we want to quit?
if (cardNumber.ToLower() == "q") break;
// Skip if no card number was entered.
if (cardNumber.Trim().Length == 0) continue;
bool isLuhnValid = false;
// Check the IIN against the valid list.
IINResult result;
string issuer = iins.GetIINIssuer(cardNumber, out result);
if (issuer.Length > 0)
{
// If it's appropriate to do the Luhn validation,
// do it. Otherwise just say that it's valid.
if (result != IINResult.ValidIINButNoLuhnValidation)
isLuhnValid = Luhn.Modulus10Check(cardNumber);
else
isLuhnValid = true;
}
// Display the result.
if (issuer.Length > 0 && isLuhnValid)
{
Console.WriteLine("VALID Card number {0} is a valid card number. Issuer = {1}.", cardNumber, issuer);
}
else
{
if (issuer.Length == 0)
{
if (result == IINResult.InvalidIIN)
Console.WriteLine("INVALID Card number {0} - IIN check failed.", cardNumber);
else if (result == IINResult.ValidIINButInactive)
Console.WriteLine("INVALID Card number {0} - Valid IIN but inactive.", cardNumber);
else
Console.WriteLine("INVALID Card number {0} - Valid IIN but card number wrong length.", cardNumber);
}
else
Console.WriteLine("INVALID Card number {0} - Luhn check failed.", cardNumber);
}
string dash = string.Empty.PadLeft(99, '-');
Console.WriteLine(dash);
}
}
static void Main(string[] args)
{
IIN iins = new IIN();
while (true)
{
// Get the card number from the user.
Console.Write("Enter a card number (press Q to quit) : ");
string cardNumber = Console.ReadLine();
// Do we want to quit?
if (cardNumber.ToLower() == "q")
{
break;
}
// Skip if no card number was entered.
if (cardNumber.Trim().Length == 0)
{
continue;
}
bool isLuhnValid = false;
// Check the IIN against the valid list.
IINResult result;
string issuer = iins.GetIINIssuer(cardNumber, out result);
if (issuer.Length > 0)
{
// If it's appropriate to do the Luhn validation,
// do it. Otherwise just say that it's valid.
if (result != IINResult.ValidIINButNoLuhnValidation)
{
isLuhnValid = Luhn.Modulus10Check(cardNumber);
}
else
{
isLuhnValid = true;
}
}
// Display the result.
if (issuer.Length > 0 && isLuhnValid)
{
Console.WriteLine("VALID Card number {0} is a valid card number. Issuer = {1}.", cardNumber, issuer);
}
else
{
if (issuer.Length == 0)
{
if (result == IINResult.InvalidIIN)
{
Console.WriteLine("INVALID Card number {0} - IIN check failed.", cardNumber);
}
else if (result == IINResult.ValidIINButInactive)
{
Console.WriteLine("INVALID Card number {0} - Valid IIN but inactive.", cardNumber);
}
else
{
Console.WriteLine("INVALID Card number {0} - Valid IIN but card number wrong length.", cardNumber);
}
}
else
{
Console.WriteLine("INVALID Card number {0} - Luhn check failed.", cardNumber);
}
}
string dash = string.Empty.PadLeft(99, '-');
Console.WriteLine(dash);
}
}