Bibliothèque de validation : FluentValidation

Fluent Validation :

Il s'agit d'une petite bibliothèque de validation qui utilise une interface fluide et les expressions lambda pour construire des règles de validation pour vos objets métier.

Plateformes cibles :

.NET 4.0
ASP.NET MVC 4 (for MVC integration)
Silverlight 4 or 5 (for Silverlight integration)
Windows Phone 8 (for Windows Phone integration)

Ex :

Code:

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using FluentValidation;
 
public class CustomerValidator: AbstractValidator<Customer> {
  public CustomerValidator() {
    RuleFor(customer => customer.Surname).NotEmpty();
    RuleFor(customer => customer.Forename).NotEmpty().WithMessage("Please specify a first name");
    RuleFor(customer => customer.Company).NotNull();
    RuleFor(customer => customer.Discount).NotEqual(0).When(customer => customer.HasDiscount);
    RuleFor(customer => customer.Address).Length(20, 250);
    RuleFor(customer => customer.Postcode).Must(BeAValidPostcode).WithMessage("Please specify a valid postcode");
  }
 
  private bool BeAValidPostcode(string postcode) {
    // custom postcode validating logic goes here
  }
}
 
Customer customer = new Customer();
CustomerValidator validator = new CustomerValidator();
ValidationResult results = validator.Validate(customer);
 
bool validationSucceeded = results.IsValid;
IList<ValidationFailure> failures = results.Errors;