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asp.net core fluent validation

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Huseyn Jafarov answered on June 3, 2023 Popularity 9/10 Helpfulness 2/10

answer asp.net core fluent validation

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asp.net core fluent validation

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Fluent Api

public class CustomerValidator : AbstractValidator<Customer>
{
  public CustomerValidator()
  {
    RuleFor(x => x.Surname).NotEmpty();
    RuleFor(x => x.Forename).NotEmpty().WithMessage("Please specify a first name");
    RuleFor(x => x.Discount).NotEqual(0).When(x => x.HasDiscount);
    RuleFor(x => x.Address).Length(20, 250);
    RuleFor(x => x.Postcode).Must(BeAValidPostcode).WithMessage("Please specify a valid postcode");
  }

  private bool BeAValidPostcode(string postcode)
  {
    // custom postcode validating logic goes here
  }
}

Popularity 9/10 Helpfulness 2/10 Language csharp

Source: docs.fluentvalidation.net

Tags: asp.net-core c# fluent validation

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Contributed on Jun 03 2023

Huseyn Jafarov

0 Answers Avg Quality 2/10

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Fluent Api Controller

public class PeopleController : Controller 
{
  private IValidator<Person> _validator;
  private IPersonRepository _repository;

  public PeopleController(IValidator<Person> validator, IPersonRepository repository) 
  {
    // Inject our validator and also a DB context for storing our person object.
    _validator = validator;
    _repository = repository;
  }

  public ActionResult Create() 
  {
    return View();
  }

  [HttpPost]
  public async Task<IActionResult> Create(Person person) 
  {
    ValidationResult result = await _validator.ValidateAsync(person);

    if (!result.IsValid) 
    {
      // Copy the validation results into ModelState.
      // ASP.NET uses the ModelState collection to populate 
      // error messages in the View.
      result.AddToModelState(this.ModelState);

      // re-render the view when validation failed.
      return View("Create", person);
    }

    _repository.Save(person); //Save the person to the database, or some other logic

    TempData["notice"] = "Person successfully created";
    return RedirectToAction("Index");
  }
}

Popularity 9/10 Helpfulness 1/10 Language csharp

Source: docs.fluentvalidation.net

Tags: asp.net-core asp.net-co

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Contributed on Jun 03 2023

Huseyn Jafarov

0 Answers Avg Quality 2/10

asp.net core fluent validation

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