Class SepaUtil

Collection of useful constants and static utility methods for processing SEPA data.

Inheritance

System.Object

SepaUtil

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: Subsembly.Sepa

Assembly: Subsembly.Sepa.dll

Syntax

public static class SepaUtil

Fields

MaxIdLen

The maximum length of a SEPA identification. (35)

Declaration

public const int MaxIdLen = 35

Field Value

Type	Description
System.Int32

MaxNmLen

The maximum length of a party name in SEPA messages. (70)

Declaration

public const int MaxNmLen = 70

Field Value

Type	Description
System.Int32

MaxRmtInfLen

The maximum length of an unstructured remittance information string. (140)

Declaration

public const int MaxRmtInfLen = 140

Field Value

Type	Description
System.Int32

NONREF

String constant containing "NONREF".

Declaration

public const string NONREF = "NONREF"

Field Value

Type	Description
System.String

NOTPROVIDED

String constant containing "NOTPROVIDED".

Declaration

public const string NOTPROVIDED = "NOTPROVIDED"

Field Value

Type	Description
System.String

SMNDA

String constant "SMNDA".

Declaration

public const string SMNDA = "SMNDA"

Field Value

Type	Description
System.String

StructuredCommunicationReference

String constant StructuredCommunicationReference ("SCOR")

Declaration

public const string StructuredCommunicationReference = "SCOR"

Field Value

Type	Description
System.String

UNBEKANNT

String constant containing "UNBEKANNT".

Declaration

public const string UNBEKANNT = "UNBEKANNT"

Field Value

Type	Description
System.String

UNKNOWN

String constant containing "UNKNOWN".

Declaration

public const string UNKNOWN = "UNKNOWN"

Field Value

Type	Description
System.String

Methods

BuildID(String, String)

Builds an ID with country code and MOD-97-10 check digits.

Declaration

public static string BuildID(string sCountryCode, string sReference)

Parameters

Type	Name	Description
System.String	sCountryCode	Two upper case characters representing the country code that is included as the first two characters of the ID.
System.String	sReference	A string of digits and upper case characters that represents the actual reference value that is included after the two check digits.

Returns

Type	Description
System.String	An ID in the format "XX00REFERENCE", where "XX" is the country code, "00" are two MOD-97-10 check digits and "REFERENCE" is the given reference value.

Exceptions

Type	Condition
System.ArgumentNullException	A parameter was null.
System.ArgumentException	The country code parameter did not consist of two upper case characters.

CaptureAlphaNum(String)

Captures digits and alpha characters from a given string. Converting lower case to upper case and skipping white space.

Declaration

public static string CaptureAlphaNum(string s)

Parameters

Type	Name	Description
System.String	s

Returns

Type	Description
System.String

CheckCharset(Char)

Checks whether the given character is an allowed SEPA character.

Declaration

public static bool CheckCharset(char ch)

Parameters

Type	Name	Description
System.Char	ch	The character to be checked.

Returns

Type	Description
System.Boolean	If the given character is a valid SEPA character, then true is returned. Otherwise false is returned.

Remarks

Banks must be able to support the Latin character set commonly used in international communication, as follows:

a b c d e f g h i j k l m n o p q r s t u v w x y z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
0 1 2 3 4 5 6 7 8 9
/ - ? : ( ) . , ' +
Space

CheckCharset(String)

Checks whether the given string contains only allowed SEPA characters.

Declaration

public static bool CheckCharset(string sText)

Parameters

Type	Name	Description
System.String	sText	The string to be checked. This could be a Name, or a RemittanceInformation or any SEPA identification.

Returns

Type	Description
System.Boolean	If the given text contains only valid characters, then true is returned. If any invalid character is found, then false is returned.

See Also

CheckCharset(Char)

EnforceCharset(String, Char)

CheckGermanCharset(Char)

Checks whether the given character is an allowed SEPA character according to the German DK rules.

Declaration

public static bool CheckGermanCharset(char ch)

Parameters

Type	Name	Description
System.Char	ch	The character to be checked.

Returns

Type	Description
System.Boolean	If the given character is an allowed SEPA character, then true is returned. Otherwise false is returned.

Remarks

a b c d e f g h i j k l m n o p q r s t u v w x y z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
0 1 2 3 4 5 6 7 8 9
/ - ? : ( ) . , ' +
Ä Ö Ü ä ö ü ß & * $ %
Space

CheckGermanCharset(String)

Checks whether the given string contains only SEPA characters allowed in the German DK SEPA specification.

Declaration

public static bool CheckGermanCharset(string sText)

Parameters

Type	Name	Description
System.String	sText	The string to be checked. This could be a Name, or a RemittanceInformation or any SEPA identification.

Returns

Type	Description
System.Boolean	If the given text contains only valid characters, then true is returned. If any invalid character is found, then false is returned.

See Also

CheckGermanCharset(Char)

EnforceGermanCharset(String, Char)

CheckIdentification(String)

Declaration

public static bool CheckIdentification(string sIdentification)

Parameters

Type	Name	Description
System.String	sIdentification	The identification value to check. Must not be null. An empty string is not considered to be a valid identification.

Returns

Type	Description
System.Boolean	If the given sIdentification is a valid identification value, then true is returned. Otherwise false is returned.

Remarks

In addition to length and character set, this also checks that the identification does not start with a slash "/", end with a slash "/", or contain a double slash "//".

Exceptions

Type	Condition
System.ArgumentNullException

CheckTagName(String)

Checks whether the given string contains only valid XML tag name characters.

Declaration

public static bool CheckTagName(string sTagName)

Parameters

Type	Name	Description
System.String	sTagName	The XML tag name to be checked.

Returns

Type	Description
System.Boolean	If the given tag name contains only valid tag name characters, then true is returned. If any invalid character is found, then false is returned.

Exceptions

Type	Condition
System.ArgumentNullException	The parameter was null.
System.ArgumentException	The parameter was an empty string.

DecimalPlaces(Decimal)

Computes the numer of significant decimal places in a decimal amount.

Declaration

public static int DecimalPlaces(decimal d)

Parameters

Type	Name	Description
System.Decimal	d

Returns

Type	Description
System.Int32

Exceptions

Type	Condition
System.ArgumentOutOfRangeException	The parameter d was a negative value.

EnforceCharset(String, Char)

Creates a valid SEPA string from any string.

Declaration

public static string EnforceCharset(string sText, char chSubstituteChar = '.')

Parameters

Type	Name	Description
System.String	sText	The text which shall be converted to a string that contains only valid SEPA characters. If this is null, then the return value is null, too.
System.Char	chSubstituteChar	The character that will be used to replace any invalid characters that do not have a special replacement character in the input string. This parameter is defaulted to a full stop '.'.

Returns

Type	Description
System.String	A valid SEPA string made from the input string where all invalid characters have been replaced by the substitute character.

Remarks

This method replaces the German umlaut characters 'ÄÖÜäöüß' with their non-decorated base characters 'AOUaous'. The ampersand '&' is replaced by a plus '+'. All other invalid characters are replaced by the given substitution character.

Exceptions

Type	Condition
System.ArgumentException	The given substitute character was itself not a valid SEPA character.

EnforceGermanCharset(String, Char)

Creates a valid SEPA string from any string according to the German DK SEPA specification.

Declaration

public static string EnforceGermanCharset(string sText, char chSubstituteChar = '.')

Parameters

Type	Name	Description
System.String	sText	The text which shall be converted to a string that contains only valid SEPA characters. If this is null, then the return value is null, too.
System.Char	chSubstituteChar	The character that will be used to replace any invalid characters that do not have a special replacement character in the input string. This parameter is defaulted to a full stop '.'.

Returns

Type	Description
System.String	A valid SEPA string made from the input string where all invalid characters have been replaced by the substitute character.

Exceptions

Type	Condition
System.ArgumentException	The given substitute character was itself not a valid SEPA character.

EnforceGermanName(String)

Enforces a valid SEPA name from a given string according to the German DK SEPA specification.

Declaration

public static string EnforceGermanName(string sName)

Parameters

Type	Name	Description
System.String	sName

Returns

Type	Description
System.String	A valid SEPA name string derived from the given name parameter. If the parameter was null or an empty string, then the string constant UNBEKANNT will be returned.

Remarks

If the given name is longer than MaxNmLen characters, it will be truncated. The string is then passed to EnforceGermanCharset(String, Char) in order to enforce a valid character set. The resulting string is returned.

EnforceIdentification(String)

Enforces a valid SEPA identification from a given string.

Declaration

public static string EnforceIdentification(string sIdentification)

Parameters

Type	Name	Description
System.String	sIdentification	The identification string to process. This may be null, or an empty string.

Returns

Type	Description
System.String	A valid SEPA identification string derived from the given sIdentification parameter. If the parameter was null or an empty string, or consists solely of whitespace, then the string constant NOTPROVIDED will be returned.

Remarks

If the given string is longer than MaxIdLen characters, it will be truncated. The string is then passed to EnforceCharset(String, Char) in order to enforce a valid character set. The resulting string is returned.

Note that a valid MandateIdentification must not contain blank characters in addition to the enforcement done here!

EnforceIdentification(String, String)

Enforces a valid SEPA identification from a given string.

Declaration

public static string EnforceIdentification(string sIdentification, string sDefault)

Parameters

Type	Name	Description
System.String	sIdentification	The identification string to process. This may be null, or an empty string.
System.String	sDefault	The default string to return in case the sIdentification is null, empty, or consists solely of whitespace.

Returns

Type	Description
System.String

EnforceName(String)

Enforces a valid SEPA name from a given string.

Declaration

public static string EnforceName(string sName)

Parameters

Type	Name	Description
System.String	sName

Returns

Type	Description
System.String	A valid SEPA name string derived from the given name parameter. If the parameter was null or an empty string, then the string constant UNKNOWN will be returned.

Remarks

If the given name is longer than MaxNmLen characters, it will be truncated. The string is then passed to EnforceCharset(String, Char) in order to enforce a valid character set. The resulting string is returned.

EnforceName(String, String)

Declaration

public static string EnforceName(string sName, string sDefault)

Parameters

Type	Name	Description
System.String	sName
System.String	sDefault

Returns

Type	Description
System.String

GenerateIdentification(String)

Generates a new and unique SEPA identification.

Declaration

public static string GenerateIdentification(string sPrefix)

Parameters

Type	Name	Description
System.String	sPrefix	Optional prefix that will be included in the generated identification. If given, it must be shorter than MaxIdLen.

Returns

Type	Description
System.String	Generates an unique numeric character identification based on the current time. The returned string can be used as a unique SEPA identifier.

Exceptions

Type	Condition
System.ArgumentException	The given prefix was too long.

GetAllSepaCountryCodes()

Returns a sorted array of all country codes of all countries that belong to the SEPA payments area.

Declaration

public static string[] GetAllSepaCountryCodes()

Returns

Type	Description
System.String[]

GetCurrencyDecimals(String)

Returns the number of decimal places of a particular currency.

Declaration

public static int GetCurrencyDecimals(string sCcy)

Parameters

Type	Name	Description
System.String	sCcy	ISO currency code of the requested currency. If this is null, empty or an invalid or unknown currency code, then the default value 2 is returned.

Returns

Type	Description
System.Int32	Number of decimals of the requested currency. Currently either 0, 2, or 3.

Remarks

Known currencies may have zero, two, or three decimals. If an unknown currency is requested, then the default value two is returned. This method never throws an exception.

IsAlpha(Char)

Indicates whether the given character is an upper case letter.

Declaration

public static bool IsAlpha(char ch)

Parameters

Type	Name	Description
System.Char	ch	Character to test.

Returns

Type	Description
System.Boolean	True if the character is an upper case letter in the range from 'A' through 'Z'.

IsAlpha(String)

Tests whether the entire string contains only upper case letters.

Declaration

public static bool IsAlpha(string s)

Parameters

Type	Name	Description
System.String	s	The string to test.

Returns

Type	Description
System.Boolean	True if all characters are upper case letters in the range from 'A' through 'Z'.

Exceptions

Type	Condition
System.ArgumentNullException	The parameter was null.

IsAlphaNumeric(Char)

Indicates whether the given character is a digit or an upper case letter.

Declaration

public static bool IsAlphaNumeric(char ch)

Parameters

Type	Name	Description
System.Char	ch	Character to test.

Returns

Type	Description
System.Boolean	True if the character is an upper case letter in the range from 'A' through 'Z' or a digit in the range from '0' through '9'.

IsAlphaNumeric(String)

Tests whether the entire string contains only digits or upper case letters.

Declaration

public static bool IsAlphaNumeric(string s)

Parameters

Type	Name	Description
System.String	s	The string to test.

Returns

Type	Description
System.Boolean	True if all characters are upper case letters in the range from 'A' through 'Z' or digits in the range from '0' through '9'.

Exceptions

Type	Condition
System.ArgumentNullException	The parameter was null.

IsEuCountryCode(String)

Determines whether the given country code is a valid EU member country code.

Declaration

public static bool IsEuCountryCode(string sCountryCode)

Parameters

Type	Name	Description
System.String	sCountryCode

Returns

Type	Description
System.Boolean	If the parameter sCountryCode is null, or an invalid country code, or not a country code of a country that is an EU member, then false is returned. Otherwise true is returned.

See Also

IsValidCountryCode(String)

IsLatin1(Char)

Indicates whether the given character is a printable character from the Latin 1 (ISO 8859-1) character set.

Declaration

public static bool IsLatin1(char ch)

Parameters

Type	Name	Description
System.Char	ch	Character to test.

Returns

Type	Description
System.Boolean	True if the character is a printable latin 1 character in the range from '\u0020' through '\u007E' or in the range from '\u00A0' through '\u00FF'.

IsLatin1(String)

Tests whether the entire string contains only printable characters from the Latin 1 (ISO 8859-1) character set.

Declaration

public static bool IsLatin1(string s)

Parameters

Type	Name	Description
System.String	s	The string to test.

Returns

Type	Description
System.Boolean	True if all characters are printable latin 1 characters in the range from '\u0020' through '\u007E' or in the range from '\u00A0' through '\u00FF'.

Exceptions

Type	Condition
System.ArgumentNullException	The parameter was null.

IsNumeric(Char)

Indicates whether the given character is a digit.

Declaration

public static bool IsNumeric(char ch)

Parameters

Type	Name	Description
System.Char	ch	Character to test.

Returns

Type	Description
System.Boolean	True if the character is a digit in the range from '0' through '9'.

IsNumeric(String)

Tests whether the entire string contains digits only.

Declaration

public static bool IsNumeric(string s)

Parameters

Type	Name	Description
System.String	s	The string to test.

Returns

Type	Description
System.Boolean	True if all characters are digits in the range from '0' through '9'.

Exceptions

Type	Condition
System.ArgumentNullException	The parameter was null.

IsSepaCountryCode(String)

Determines whether the given country code is a valid country code of a SEPA country.

Declaration

public static bool IsSepaCountryCode(string sCountryCode)

Parameters

Type	Name	Description
System.String	sCountryCode

Returns

Type	Description
System.Boolean	If the parameter sCountryCode is null, or an invalid country code, or not a country code of a country that belongs to SEPA, then false is returned. Otherwise true is returned.

See Also

IsValidCountryCode(String)

IsValidCountryCode(String)

Checks the syntax of the given country code.

Declaration

public static bool IsValidCountryCode(string sCountryCode)

Parameters

Type	Name	Description
System.String	sCountryCode

Returns

Type	Description
System.Boolean

Remarks

This only validates the syntax and does not check whether the given country actually exists. A valid country code consists of exactly two upper case letters (A-Z).

IsValidCurrencyCode(String)

Checks the syntax of the given currency code.

Declaration

public static bool IsValidCurrencyCode(string sCurrencyCode)

Parameters

Type	Name	Description
System.String	sCurrencyCode

Returns

Type	Description
System.Boolean

Remarks

This only validates the syntax and does not check whether the given currency actually exists. A valid currency code consists of exactly three upper case letters (A-Z).

IsValidID(String)

Validates an ID including a MOD-97-10 validation.

Declaration

public static bool IsValidID(string sID)

Parameters

Type	Name	Description
System.String	sID	The ID to validate. This could be an IBAN, a creditor reference or a creditor ID, or any other ID that follows the same basic pattern.

Returns

Type	Description
System.Boolean	If the given ID is valid, then true is returned. Otherwise false is returned.

Remarks

The validation checks whether the first two characters are upper case letters, and the subsequent two characters are valid MOD-97-10 check digits. The remainder must consist of digits and upper case letters, only.

NullTrim(String)

Trims whitespace from a string, returning null, when the trimmed string is empty.

Declaration

public static string NullTrim(string s)

Parameters

Type	Name	Description
System.String	s	String to be trimmed. May be null.

Returns

Type	Description
System.String

ToDateTimeFromDt(String)

Declaration

public static DateTime ToDateTimeFromDt(string sDt)

Parameters

Type	Name	Description
System.String	sDt

Returns

Type	Description
System.DateTime

ToLocalDateTime(String)

Converts a ISO date time specification to a DateTime of kind LocalTime.

Declaration

public static DateTime ToLocalDateTime(string s)

Parameters

Type	Name	Description
System.String	s

Returns

Type	Description
System.DateTime	If the parameter was null, or an empty string, or malformed, then DateTime.MinValue is returned. Otherwise a local DateTime is returned.

ToLocalTime(DateTime)

Converts a given DateTime to a DateTime in local time.

Declaration

public static DateTime ToLocalTime(DateTime tDateTime)

Parameters

Type	Name	Description
System.DateTime	tDateTime

Returns

Type	Description
System.DateTime

Remarks

This method differs from DateTime.ToLocalTime, that it does not assume that an DateTimeKind.Unspecified is a UTC time stamp, but assumes that an unspecified kind already is a local time.

Trim(String)

Trims whitespace from a string.

Declaration

public static string Trim(string s)

Parameters

Type	Name	Description
System.String	s	String to be trimmed. May be null.

Returns

Type	Description
System.String	If the parameter s was null, then null is returned, otherwise the trimmed string is returned. If the given string consists solely of whitespace, then an empty string will be returned.

Trim(String, Int32)

Trims whitespace from a string and truncates to MaxLen.

Declaration

public static string Trim(string s, int nMaxLen)

Parameters

Type	Name	Description
System.String	s	String to be trimmed. May be null.
System.Int32	nMaxLen	Max length of returned string.

Returns

Type	Description
System.String	If the parameter s was null, then null is returned, otherwise the trimmed and truncated string is returned. The length of the returned string will be smaller or equal to MaxLen. If the given string consists solely of whitespace, then an empty string will be returned.

TrimReference(String)

Trims the given string using NullTrim(String). If the result is NONREF, or NOTPROVIDED, then null is returned. Otherwise the trimmed string is returned.

Declaration

public static string TrimReference(string s)

Parameters

Type	Name	Description
System.String	s	String to be trimmed. May be null.

Returns

Type	Description
System.String	Returns the trimmed string, or null.