ASP.NET MVC3: 验证类型 ModelClientValidationRule

Question

我刚刚创建了一个MVC3应用程序来学习验证。它使用DataAnnotations。我创建了一个名为CustomStartLetterMatch的自定义ValidationAttribute。它实现了“System.Web.Mvc.IClientValidatable”。我编写了相应的客户端代码，使用非侵入式jQuery。这正如预期的那样工作。

关于自定义验证器：它比较了名字输入和姓氏输入。如果它们的第一个字符不同，则会抛出错误。

正如我所说，该应用程序运行良好。但是当我看到“rule.ValidationType =“greaterdate”；”时，我感到困惑。我想将其更改为其他内容，例如“anotherDefaultType”。当我更改它时，它会失败并显示jQuery错误。

以下是您需要翻译的问题：

1. 这是什么原因？ 2. 有哪些可用的ValidationTypes？ 3. 在这种情况下更改ValidationType的建议方法是什么？

代码：

using System;
using System.ComponentModel.DataAnnotations;
using System.Collections.Generic;
namespace MyValidationTEST
{
    public class Person
    {
    [Required(ErrorMessage = "First name required")]
    public string FirstName { get; set; }

    [CustomStartLetterMatch("FirstName")]
    [StringLength(5,ErrorMessage = "Must be under 5 characters")]
    public string LastName { get; set; }

    [Range(18,50,ErrorMessage="Must be between 18 and 50")]
    public int Age { get; set; }

}



public sealed class CustomStartLetterMatch : ValidationAttribute, System.Web.Mvc.IClientValidatable 
{

    private const string _defaultErrorMessage = " First letter of '{0}' must be same as first letetr of '{1}'";
    private string _basePropertyName;

    public CustomStartLetterMatch(string basePropertyName)
        : base(_defaultErrorMessage)
    {
        _basePropertyName = basePropertyName;
    }


    //Override FormatErrorMessage Method
    public override string FormatErrorMessage(string name)
    {
        return string.Format(_defaultErrorMessage, name, _basePropertyName);
    }


    //Override IsValid
    protected override ValidationResult IsValid(object value, System.ComponentModel.DataAnnotations.ValidationContext validationContext)
    {
        //Get PropertyInfo Object
        var basePropertyInfo = validationContext.ObjectType.GetProperty(_basePropertyName);
        var baseValue = (string)basePropertyInfo.GetValue(validationContext.ObjectInstance, null);
        var currentValue = (string)value;


        string firstLetterBaseValue = baseValue.Substring(0, 1);
        string firstLetterCurrentValue = currentValue.Substring(0, 1);

        //Comparision
        if (!string.Equals(firstLetterBaseValue, firstLetterCurrentValue))
        {
            var message = FormatErrorMessage(validationContext.DisplayName);
            return new ValidationResult(message);
        }

        //Default return - This means there were no validation error
        return null;
    }


    public IEnumerable<System.Web.Mvc.ModelClientValidationRule> GetClientValidationRules(System.Web.Mvc.ModelMetadata metadata, System.Web.Mvc.ControllerContext context)
    {
        var rule = new System.Web.Mvc.ModelClientValidationRule();
        rule.ErrorMessage = FormatErrorMessage(metadata.GetDisplayName());
        rule.ValidationParameters.Add("other", _basePropertyName);
        rule.ValidationType = "greaterdate";
        yield return rule;
    }



}

}

视图

@model MyValidationTEST.Person

@{
ViewBag.Title = "Create";
}

<h2>Create</h2>

<script src="@Url.Content("~/Scripts/jquery-1.5.1.min.js")" type="text/javascript">  </script>

@*UnObtrusive*@
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>



<script type="text/javascript">

/*Register adapter - addSingleVal*/
jQuery.validator.unobtrusive.adapters.addSingleVal("greaterdate", "other");


/*Validation type names in unobtrusive client validation rules must consist of only lowercase letters*/

/*Add Method*/
jQuery.validator.addMethod("greaterdate",
                                    function (val, element, other) 
                                    {

                                        var modelPrefix = element.name.substr(0, element.name.lastIndexOf(".") + 1)
                                        var otherVal = $("[name=" + modelPrefix + other + "]").val();

                                        if (val && otherVal) 
                                        {
                                            var lastNameFirstLetter = val.substr(0, 1);
                                            var firstNameFirstLetter = otherVal.substr(0, 1);

                                            if (lastNameFirstLetter != firstNameFirstLetter) 
                                            {
                                                return false;
                                            }
                                        }
                                        return true;
                                    });


</script>


@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
    <legend>Person</legend>

    <div class="editor-label">
        @Html.LabelFor(model => model.FirstName)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.FirstName)
        @Html.ValidationMessageFor(model => model.FirstName)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.LastName)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.LastName)
        @Html.ValidationMessageFor(model => model.LastName)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.Age)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Age)
        @Html.ValidationMessageFor(model => model.Age)
    </div>

    <p>
        <input type="submit" value="Create" />
    </p>
</fieldset>
}

<div>
@Html.ActionLink("Back to List", "Index")
</div>

控制器：

using System.Web.Mvc;
namespace MyValidationTEST.Controllers
{
public class RelativesController : Controller
{

    // GET: /Relatives/
    public ActionResult Index()
    {
        return View();
    }



    // GET: /Relatives/Create
    public ActionResult Create()
    {
        Person person = new Person();
        return View(person);
    }


    // POST: /Relatives/Create
    [HttpPost]
    public ActionResult Create(Person relativeToAdd)
    {
        if (ModelState.IsValid)
        {
            return RedirectToAction("Index");
        }
        return View(relativeToAdd);
    }

    }

 }

阅读：

ASP.NET MVC3 - 自定义验证属性 -> 客户端无效

- LCJ

---

你是只改了 rule.ValidationType = "greaterdate"; 这一行代码，还是同时修改了 JavaScript 代码以匹配它？ - Rich Tebb

我在三个地方进行了更改。1）rule.ValidationType =“greaterdate” 2）在Javascript中注册适配器。3）在Javascript的addmethod中。 - LCJ

我已经添加了控制器代码，这样你就可以在你的端上自己尝试并查看错误了。 - LCJ

Answer 1

我想将其更改为"anotherDefaultType"之类的内容

您只能使用小写字母来设置ValidationType属性：

rule.ValidationType = "anotherdefaulttype";

然后调整您的客户端脚本以反映这种修改：

jQuery.validator.unobtrusive.adapters.addSingleVal("anotherdefaulttype", "other");
jQuery.validator.addMethod("anotherdefaulttype", function (val, element, other) {
    ...
});

- Darin Dimitrov