Project DescriptionA small validation library for .NET that uses a fluent interface and lambda expressions for building validation rules for your business objects.
If you find FluentValidation useful, please consider making a donation.
NuGet packages are available - the package IDs are FluentValidation, FluentValidation.MVC3 and FluentValidation.MVC4.
If you need signed binaries then use the NuGet packages FluentValidaiton-signed, FluentValidation.MVC3-signed and FluentValidation.MVC4-signed.
The main source code repository for this project is
on GitHub although it is also mirrored to CodePlex.
Example
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;
