软设课程设计：C#、WPF桌面应用-教材管理（附源码解决方案）

FluentValidation is validation library for .NET that uses a fluent interface and lambda expressions for building strongly-typed validation rules. ### Supporting the project If you use FluentValidation in a commercial project, please sponsor the project financially. FluentValidation is developed and supported by [@JeremySkinner](https://github.com/JeremySkinner) for free in his spare time and financial sponsorship helps keep the project going. You can sponsor the project via either [GitHub sponsors](https://github.com/sponsors/JeremySkinner) or [OpenCollective](https://opencollective.com/FluentValidation). ### Example With FluentValidation, you can define a class that inherits from `AbstractValidator` which contains the rules for a particular class. The example below shows how you could define rules for a `Customer` class, and then how to execute the validator. ```c# using FluentValidation; 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 } } var customer = new Customer(); var validator = new CustomerValidator(); // Execute the validator. ValidationResult results = validator.Validate(customer); // Inspect any validation failures. bool success = results.IsValid; List<ValidationFailure> failures = results.Errors; ``` ### Full Documentation Full documentation can be found at [https://docs.fluentvalidation.net](https://docs.fluentvalidation.net) ### Release Notes and Change Log Release notes [can be found on GitHub](https://github.com/FluentValidation/FluentValidation/releases).