ASP.NET MVC中使用FluentValidation验证实体

2022-09-29 12:51:48

　　1、FluentValidation介绍

　　FluentValidation是与ASP.NET DataAnnotataion Attribute验证实体不同的数据验证组件，提供了将实体与验证分离开来的验证方式，同时FluentValidation还提供了表达式链式语法。

　　2、安装FluentValidation

　　FluentValidation地址：http://fluentvalidation.codeplex.com/

　　使用Visual Studio的管理NuGet程序包安装FluentValidation及FluentValidation.Mvc

　　3、通过ModelState使用FluentValidation验证

　　项目解决方案结构图：

　　实体类Customer.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Libing.Portal.Web.Models.Entities
{
    public class Customer
    {
        public int CustomerID { get; set; }
        public string CustomerName { get; set; }
        public string Email { get; set; }
        public string Address { get; set; }
        public string Postcode { get; set; }
        public float? Discount { get; set; }
        public bool HasDiscount { get; set; }
    }
}

　　数据验证类CustomerValidator.cs：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

using FluentValidation;

using Libing.Portal.Web.Models.Entities;

namespace Libing.Portal.Web.Models.Validators
{
    public class CustomerValidator : AbstractValidator<Customer>
    {
        public CustomerValidator()
        {
            RuleFor(customer => customer.CustomerName).NotNull().WithMessage("客户名称不能为空");
            RuleFor(customer => customer.Email)
                .NotEmpty().WithMessage("邮箱不能为空")
                .EmailAddress().WithMessage("邮箱格式不正确");
            RuleFor(customer => customer.Discount)
                .NotEqual(0)
                .When(customer => customer.HasDiscount);
            RuleFor(customer => customer.Address)
                .NotEmpty()
                .WithMessage("地址不能为空")
                .Length(20, 50)
                .WithMessage("地址长度范围为20-50字节");
        }
    }
}

　　控制器类CustomerController.cs：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

using FluentValidation.Results;

using Libing.Portal.Web.Models.Entities;
using Libing.Portal.Web.Models.Validators;

namespace Libing.Portal.Web.Controllers
{
    public class CustomerController : Controller
    {
        public ActionResult Index()
        {
            return View();
        }

        public ActionResult Create()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Create(Customer customer)
        {
            CustomerValidator validator = new CustomerValidator();
            ValidationResult result = validator.Validate(customer);

            if (!result.IsValid)
            {
                result.Errors.ToList().ForEach(error =>
                {
                    ModelState.AddModelError(error.PropertyName, error.ErrorMessage);
                });
            }

            if (ModelState.IsValid)
            {
                return RedirectToAction("Index");
            }

            return View(customer);
        }
    }
}

　　View页面Create.cshtml，该页面为在添加View时选择Create模板自动生成：

@model Libing.Portal.Web.Models.Entities.Customer

@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Create</title>
</head>
<body>
    @using (Html.BeginForm()) 
    {
        @Html.AntiForgeryToken()
        
        <div class="form-horizontal">
            <h4>Customer</h4>
            <hr />
            @Html.ValidationSummary(true)
    
            <div class="form-group">
                @Html.LabelFor(model => model.CustomerName, new { @class = "control-label col-md-2" })
                <div class="col-md-10">
                    @Html.EditorFor(model => model.CustomerName)
                    @Html.ValidationMessageFor(model => model.CustomerName)
                </div>
            </div>
    
            <div class="form-group">
                @Html.LabelFor(model => model.Email, new { @class = "control-label col-md-2" })
                <div class="col-md-10">
                    @Html.EditorFor(model => model.Email)
                    @Html.ValidationMessageFor(model => model.Email)
                </div>
            </div>
    
            <div class="form-group">
                @Html.LabelFor(model => model.Address, new { @class = "control-label col-md-2" })
                <div class="col-md-10">
                    @Html.EditorFor(model => model.Address)
                    @Html.ValidationMessageFor(model => model.Address)
                </div>
            </div>
    
            <div class="form-group">
                @Html.LabelFor(model => model.Postcode, new { @class = "control-label col-md-2" })
                <div class="col-md-10">
                    @Html.EditorFor(model => model.Postcode)
                    @Html.ValidationMessageFor(model => model.Postcode)
                </div>
            </div>
    
            <div class="form-group">
                @Html.LabelFor(model => model.Discount, new { @class = "control-label col-md-2" })
                <div class="col-md-10">
                    @Html.EditorFor(model => model.Discount)
                    @Html.ValidationMessageFor(model => model.Discount)
                </div>
            </div>
    
            <div class="form-group">
                @Html.LabelFor(model => model.HasDiscount, new { @class = "control-label col-md-2" })
                <div class="col-md-10">
                    @Html.EditorFor(model => model.HasDiscount)
                    @Html.ValidationMessageFor(model => model.HasDiscount)
                </div>
            </div>
    
            <div class="form-group">
                <div class="col-md-offset-2 col-md-10">
                    <input type="submit" value="Create" class="btn btn-default" />
                </div>
            </div>
        </div>
    }
</body>
</html>

　　运行效果：

ASP.NET MVC中使用FluentValidation验证实体,布布扣,bubuko.com

ASP.NET MVC中使用FluentValidation验证实体

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