FluentValidation在asp.net core中怎么使用？

先安装包。

Install-Package FluentValidation.AspNetCore

和上一篇的实体类和验证类一样。

实体类：

public class Person
{public int Id { get; set; }public string Name { get; set; }public string Tel { get; set; }public string Email { get; set; }public DateTime Birthday { get; set; }public string IDCard { get; set; }public PersonAddress Address { get; set; }
}
public class PersonAddress
{public string Country { get; set; }public string Province { get; set; }public string City { get; set; }public string County { get; set; }public string Address { get; set; }public string Postcode { get; set; }
}

验证类：

/// <summary>
/// Person验证
/// </summary>
public class PersonValidator : AbstractValidator<Person>
{public PersonValidator(){RuleFor(p => p.Name).NotNull().NotEmpty();RuleFor(p => p.Email).NotNull().EmailAddress();RuleFor(p => p.Birthday).NotNull();RuleFor(p => p.IDCard).NotNull().When(p => (DateTime.Now > p.Birthday.AddYears(1))).WithMessage(p => $"出生日期为{p.Birthday}，现在时间为{DateTime.Now},大于一岁，CardID值必填！").NotEmpty().When(p => (DateTime.Now > p.Birthday.AddYears(1))).WithMessage(p => $"出生日期为{p.Birthday}，现在时间为{DateTime.Now},大于一岁，CardID值必填！").Length(18).When(p => (DateTime.Now > p.Birthday.AddYears(1)));RuleFor(p => p.Tel).NotNull().Matches(@"^(\d{3,4}-)?\d{6,8}$|^[1]+[3,4,5,8]+\d{9}$");RuleFor(p => p.Address).NotNull();RuleFor(p => p.Address).SetValidator(new PersonAddressValidator());}
}
/// <summary>
/// Person Address验证
/// </summary>
public class PersonAddressValidator : AbstractValidator<PersonAddress>
{public PersonAddressValidator(){RuleFor(a => a.Country).NotNull().NotEmpty();RuleFor(a => a.Province).NotNull().NotEmpty();RuleFor(a => a.City).NotNull().NotEmpty();RuleFor(a => a.County).NotNull().NotEmpty();RuleFor(a => a.Address).NotNull().NotEmpty();RuleFor(a => a.Postcode).NotNull().NotEmpty().Length(6);}
}

Starup.cs

public void ConfigureServices(IServiceCollection services)
{services.AddControllers().AddFluentValidation();services.AddTransient<IValidator<Person>, PersonValidator>();services.AddSwaggerGen(c =>{c.SwaggerDoc("v1", new OpenApiInfo { Title = "FluentValidationWebDemo01", Version = "v1" });});
}

这里和asp.net core mvc的模型验证如出一辙。

 [ApiController][Route("[controller]")]public class HomeController : ControllerBase{private readonly ILogger<HomeController> _logger;private readonly IValidator<Person> _validator;public HomeController(ILogger<HomeController> logger, IValidator<Person> validator){_validator = validator;_logger = logger;}[HttpPost("/addperson")]public IActionResult AddPerson([FromBody] Person person){_logger.LogInformation("添加Person");if (ModelState.IsValid){return Ok("验证成功后，假装这里作了后端业务处理");}_logger.LogError("验证Person失败");return BadRequest("person没有验证通过");}}

测试传入数据：

{"id":0,"birthday":"2021-03-29T07:00:18.061Z","idCard":"","name":"","email":"axzxs2001163.com","tel":"1345346714","address":{"country":"中国","province":"山西","city":"","county":"古城","address":"","postcode":"04600"}
}

结果：

{"type": "https://tools.ietf.org/html/rfc7231#p-6.5.1","title": "One or more validation errors occurred.","status": 400,"traceId": "00-21fffead3f693fdf9156d796baf4e4ef-a7d39f85acf57cff-00","errors": {"Tel": ["'Tel' 的格式不正确。"],"Name": ["'Name' 不能为空。"],"Email": ["'Email' 不是有效的电子邮件地址。"],"Address.City": ["'City' 不能为空。"],"Address.Address": ["'Address' 不能为空。"],"Address.Postcode": ["'Postcode' 必须是 6 个字符，您输入了 5 字符。"]}
}

还是那句话，FluentValidation提供了更灵活，完强大的验证方式