CardValidator Component

Properties   Methods   Events   Config Settings   Errors  

The CardValidator component is used to verify that a given credit card number is formatted properly, and could be a valid card number. Validating a card before actually submitting a transaction for authorization can reduce the fees that may be associated with invalid or declined transactions.

Syntax

DPayments.InPay.Cardvalidator

Remarks

Utilization of this component catches accidentally mistyped card numbers and allows buyers to re-input their number without having the transaction declined. It can also determine the type of credit card (Visa, MasterCard, Discover, etc) to easily determine if the customer is presenting a payment type which you do not support. The component can also parse swiped track data and perform these same checks on it.

There are three checks performed on the customer's credit card information:

The ValidateCard method explains these checks in more detail.

Property List

The following is the full list of the properties of the component with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the component with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the component with short descriptions. Click on the links for further details.

CardExpMonth Property (CardValidator Component)

Expiration month of the credit card specified in CardNumber .

Syntax

• C#
• VB.NET

public int CardExpMonth { get; set; }

Public Property CardExpMonth As Integer

Default Value

1

Remarks

This field contains the month portion of the expiration date of the customer's credit card. This property must be in the range 1 - 12. The ValidateCard method compares this property against the system time to determine if the card is expired.

CardExpYear Property (CardValidator Component)

Expiration year of the credit card specified in CardNumber .

Syntax

• C#
• VB.NET

public int CardExpYear { get; set; }

Public Property CardExpYear As Integer

Default Value

0

Remarks

This field contains the year portion of the expiration date of the customer's credit card. This property must be in the range 00-99, or 2000-2099. The ValidateCard method compares this property against the system time to determine if the card is expired.

CardNumber Property (CardValidator Component)

Credit card number to be validated.

Syntax

• C#
• VB.NET

public string CardNumber { get; set; }

Public Property CardNumber As String

Default Value

""

Remarks

This property contains the customer's credit card number. A credit card number may be of any length, and may optionally include dashes or spaces. However, in practice the maximum length of the supported CardTypes is 19 characters (excluding whitespace), and the minimum length is 13 characters.

CardType Property (CardValidator Component)

Indicates the results of the Luhn Digit Check algorithm.

Syntax

• C#
• VB.NET

public CardvalidatorCardTypes CardType { get; }

enum CardvalidatorCardTypes {
  vctUnknown,
  vctVisa,
  vctMasterCard,
  vctAmex,
  vctDiscover,
  vctDiners,
  vctJCB,
  vctVisaElectron,
  vctMaestro,
  vctCUP,
  vctLaser
}

Public ReadOnly Property CardType As CardvalidatorCardTypes

Enum CardvalidatorCardTypes
  vctUnknown
  vctVisa
  vctMasterCard
  vctAmex
  vctDiscover
  vctDiners
  vctJCB
  vctVisaElectron
  vctMaestro
  vctCUP
  vctLaser
End Enum

Default Value

0

Remarks

This property is filled after a call to the ValidateCard method. Allowable values include:

This property is read-only and not available at design time.

CardTypeDescription Property (CardValidator Component)

Human-readable description of the CardType

Syntax

• C#
• VB.NET

public string CardTypeDescription { get; }

Public ReadOnly Property CardTypeDescription As String

Default Value

""

Remarks

This property is filled after calling the ValidateCard method, and will contain a text description of the CardType. This is useful to distinguish different program cards. For instance, a CardType of ccDiners might have a corresponding CardTypeDescription of "Diner's Club International", "Diner's Club Carte Blanche", or "Diner's Club enRoute".

This property is read-only.

DateCheckPassed Property (CardValidator Component)

Indicates whether the card is expired or not.

Syntax

• C#
• VB.NET

public bool DateCheckPassed { get; }

Public ReadOnly Property DateCheckPassed As Boolean

Default Value

False

Remarks

The ValidateCard method checks whether the card's expiration date (CardExpMonth and CardExpYear) is a valid future date, and stores that result in the DateCheckPassed property.

This property is read-only.

DigitCheckPassed Property (CardValidator Component)

Indicates the results of the Luhn Digit Check algorithm.

Syntax

• C#
• VB.NET

public bool DigitCheckPassed { get; }

Public ReadOnly Property DigitCheckPassed As Boolean

Default Value

False

Remarks

The ValidateCard method checks whether or not the CardNumber conforms to the mod-10 digit check algorithm, and stores that result in the DigitCheckPassed property. Note that a card may pass this check and still be an invalid card. (Either a fake number that passes the digit check, or an unknown CardType).

This property is read-only.

TrackData Property (CardValidator Component)

Magnetic stripe data read off the credit card.

Syntax

• C#
• VB.NET

public string TrackData { get; set; }

Public Property TrackData As String

Default Value

""

Remarks

This property may be set with the magnetic stripe read off the back of a credit card using any commercially available card reader. You may set this property with either Track1 or Track2 data. If TrackData is set, the values contained in CardNumber, CardExpMonth, and CardExpYear are ignored when calling ValidateCard. Instead, these properties are parsed out of the track data. This allows you to easily retrieve the expiration date and card number from either Track1 or Track2 data. For instance:

CardValidator1.TrackData = "4012000033330026=21121015432112345678" CardValidator1.ValidateCard()

The CardNumber, CardExpMonth, and CardExpYear will now contain the values parsed from the track data. TrackType will also indicate whether the TrackData is Track1 or Track2 (in this case, it's Track2 data).

TrackType Property (CardValidator Component)

Indicates the type of the specified TrackData .

Syntax

• C#
• VB.NET

public CardvalidatorTrackTypes TrackType { get; }

enum CardvalidatorTrackTypes {
  ttUnknown,
  ttTrack1,
  ttTrack2
}

Public ReadOnly Property TrackType As CardvalidatorTrackTypes

Enum CardvalidatorTrackTypes
  ttUnknown
  ttTrack1
  ttTrack2
End Enum

Default Value

0

Remarks

This property will be filled after a call to ValidateCard. If magnetic stripe data was supplied in the TrackData field, this property will indicate which type of track was entered. If no track data was entered (ie, the CardNumber was specified instead) then the TrackType will be ttUnknown.

This property is read-only and not available at design time.

Config Method (CardValidator Component)

Sets or retrieves a configuration setting.

Syntax

• C#
• VB.NET

public string Config(string configurationString);

Public Function Config(ByVal ConfigurationString As String) As String

Remarks

Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

Reset Method (CardValidator Component)

Clears all properties to their default values.

Syntax

• C#
• VB.NET

public void Reset();

Public Sub Reset()

Remarks

This method clears all properties to their default values.

ValidateCard Method (CardValidator Component)

Checks the card number and expiration date for validity.

Syntax

• C#
• VB.NET

public void ValidateCard();

Public Sub ValidateCard()

Remarks

This method performs several checks on customer information to determine if the card information submitted could be valid. This should be done before submitting an actual transaction for authorization. The tests performed are listed below:

Error Event (CardValidator Component)

Information about errors during data delivery.

Syntax

• C#
• VB.NET

public event OnErrorHandler OnError;

public delegate void OnErrorHandler(object sender, CardvalidatorErrorEventArgs e);

public class CardvalidatorErrorEventArgs : EventArgs {
  public int ErrorCode { get; }
  public string Description { get; }
}

Public Event OnError As OnErrorHandler

Public Delegate Sub OnErrorHandler(sender As Object, e As CardvalidatorErrorEventArgs)

Public Class CardvalidatorErrorEventArgs Inherits EventArgs
  Public ReadOnly Property ErrorCode As Integer
  Public ReadOnly Property Description As String
End Class

Remarks

The Error event is fired in case of exceptional conditions during message processing.

ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

Config Settings (CardValidator Component)

CardValidator Config Settings

Base Config Settings

Trappable Errors (CardValidator Component)

CardValidator Errors

	504   Luhn digit check failed.
	505   Card date invalid.
	506   Card expired.
	703   Invalid CardNumber format (contains letters or unknown characters).
	704   Could not determine the Credit Card type.
	705   Error parsing TrackData. Format cannot be determined.