https://github.com/davidrogersdev/businessvalidation

A very small library for performing validation in Business Services.
https://github.com/davidrogersdev/businessvalidation

csharp-library csharp-validation validation validation-library validator

Last synced: about 1 year ago
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A very small library for performing validation in Business Services.

• Host: GitHub
• URL: https://github.com/davidrogersdev/businessvalidation
• Owner: DavidRogersDev
• License: mit
• Created: 2022-06-25T01:26:21.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2025-03-07T08:50:45.000Z (over 1 year ago)
• Last Synced: 2025-04-24T05:24:19.286Z (about 1 year ago)
• Topics: csharp-library, csharp-validation, validation, validation-library, validator
• Language: C#
• Homepage:
• Size: 2.23 MB
• Stars: 5
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE

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README

          
[![NuGet](https://img.shields.io/nuget/v/BusinessValidation.svg?style=flat-square)](https://www.nuget.org/packages/BusinessValidation/) BusinessValidation  

# BusinessValidation

An awfully small library for performing validation in Business Services.

## Run Business Validation Rules

A simple example:

```csharp

var validator = new Validator();

// basic validation. The checkRego method (last argument) would return a Boolean.

validator.Validate("CarRegistration", "Vehicle does not have a current, valid registration", checkRego(someVehicle));

if(validator) {

    var licensee = GetLicensee(licenceNr);

    if(licensee is null) {

        // add a raw message to the relevant Failure Bundle.

        validator.AddFailure("Licensee", $"No licensee exists with the licence number {licenceNr}.");

    } else {

        // validate an object

        validator.Validate(l => l.DateOfBirth, $"No valid date of birth is stored for the licensee with licence number {licenceNr}", licensee, l => l.DateOfBirth > DateTime.MinValue);

    }    

}    

validator.ThrowIfInvalid(); // throws exception, only if IsValid() is false, which wraps the Validation Failures dictionary.

return validator; // returns object which implicitly casts to "true" if valid. 

```

More example code can be found in the **sample** project in the repo code.

## Read About it

I wrote an article explaining the genesis and usage of Business Validation [here](https://medium.com/p/ef161bf5e3b9).

## Build It

You can easily build the assembly by cloning the repository, changing to the root directory in a shell and running the following command:    

`nuke Compile`  

If you also want to run the unit tests:  

`nuke Test`