C# 中 Fluent Validation 的用途是什么?如何在 C# 中使用?
csharpserver side programmingprogramming更新于 2025/10/17 13:22:17
FluentValidation 是一个用于构建强类型验证规则的 .NET 库。它使用 Fluent 接口和 Lambda 表达式来构建验证规则。它有助于清理您的域代码并使其更具凝聚力，同时为您提供一个单一的验证逻辑查找位置。
要使用 Fluent Validation，我们必须安装以下软件包
<PackageReference Include="FluentValidation" Version="9.2.2" />
示例 1
static class Program {
static void Main (string[] args) {
List errors = new List();
PersonModel person = new PersonModel();
person.FirstName = "";
person.LastName = "S";
person.AccountBalance = 100;
person.DateOfBirth = DateTime.Now.Date;
PersonValidator validator = new PersonValidator();
ValidationResult results = validator.Validate(person);
if (results.IsValid == false) {
foreach (ValidationFailure failure in results.Errors) {
errors.Add(failure.ErrorMessage);
}
}
foreach (var item in errors) {
Console.WriteLine(item);
}
Console.ReadLine ();
}
}
public class PersonModel {
public string FirstName { get; set; }
public string LastName { get; set; }
public decimal AccountBalance { get; set; }
public DateTime DateOfBirth { get; set; }
}
public class PersonValidator : AbstractValidator {
public PersonValidator(){
RuleFor(p => p.FirstName)
.Cascade(CascadeMode.StopOnFirstFailure)
.NotEmpty().WithMessage("{PropertyName} is Empty")
.Length(2, 50).WithMessage("Length ({TotalLength}) of {PropertyName} Invalid")
.Must(BeAValidName).WithMessage("{PropertyName} Contains Invalid Characters");
RuleFor(p => p.LastName)
.Cascade(CascadeMode.StopOnFirstFailure)
.NotEmpty().WithMessage("{PropertyName} is Empty")
.Length(2, 50).WithMessage("Length ({TotalLength}) of {PropertyName} Invalid")
.Must(BeAValidName).WithMessage("{PropertyName} Contains Invalid Characters");
}
protected bool BeAValidName(string name) {
name = name.Replace(" ", "");
name = name.Replace("-", "");
return name.All(Char.IsLetter);
}
}
输出
First Name is Empty Length (1) of Last Name Invalid
