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#section-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

 

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