SimpleISO7064 2.0.1

Simple ISO 7064

C# library that provide ISO 7064 implementations to verify or calculate check characters.

Out of the box, the library supports the following pure systems:

• Modulus 11 with Radix 2
• Modulus 37 with Radix 2
• Modulus 97 with Radix 10
• Modulus 661 with Radix 26
• Modulus 1271 with Radix 36

Installation

This library can be installed via NuGet package. Just run the following command:

Install-Package SimpleISO7064

Compatibility

This library directly targets the following frameworks:

• .NET Standard 1.0;
• .NET Standard 2.0;
• .NET Framework 2.0;
• .NET Framework 4.0;
• .NET 5.0;

Usage

Basic example (using Mod 11 Radix 2 singleton):

const string value = "101100002683118740";

IIso7064PureSystemProvider provider = Iso7064.PureSystem.Mod11Radix2;

// computes the check digit -> 7
var checkDigit = provider.ComputeCheckDigit(value);

// computes the value with the check digit -> 1011000026831187407
var computed = provider.Compute(value);

// checks if the value is valid -> true
var isValid = provider.IsValid(computed);

Out of the box pure systems are available in the Iso7064.PureSystem namespace.

var mod11Radix2 = new Mod11Radix2();
var mod37Radix2 = new Mod37Radix2();
var mod97Radix10 = new Mod97Radix10();
var mod661Radix26 = new Mod661Radix26();
var mod1271Radix36 = new Mod1271Radix36();

Since the pure system implementations are thread safe, it is recommended to use the singleton instances available in the Iso7064.PureSystem class.

var mod11Radix2 = Iso7064.PureSystem.Mod11Radix2;
var mod37Radix2 = Iso7064.PureSystem.Mod37Radix2;
var mod97Radix10 = Iso7064.PureSystem.Mod97Radix10;
var mod661Radix26 = Iso7064.PureSystem.Mod661Radix26;
var mod1271Radix36 = Iso7064.PureSystem.Mod1271Radix36;

You can also create your own pure systems either by creating a new instance of Iso7064PureSystemProvider, using the builder method provided by the Iso7064Factory class or by implementing the IIso7064PureSystemProvider interface.

// using the constructor
var provider = new Iso7064PureSystemProvider(11, 2, false, "0123456789X");

// using the factory
var provider = Iso7064.Factory.Get(11, 2, false, "0123456789X");