ASP.NET MVC 4 - 客户端验证不起作用

Question

我正在使用Visual Studio 2012,我无法获得自定义属性客户端逻辑,以便以较小的规模重现,我创建了一个新的MVC 4项目,我创建了以下模型和属性,永远不会验证

public class MyModel
{
    public int Id { get; set; }
    [Required]
    public string LastName { get; set; }
    [NeverValid(ErrorMessage="Serverside Will Never Validate")]
    public string FirstName { get; set; }
}

public class NeverValidAttribute : ValidationAttribute, IClientValidatable
{
    public override bool IsValid(object value)
    {
        return false;
    }

    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {
        return new ValidationResult(this.ErrorMessage, new[] { validationContext.MemberName });
    }

    public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
    {
        yield return new ModelClientValidationRule
        {
            ErrorMessage = this.ErrorMessage,
            ValidationType = "nevervalid"
        };
    }
}

然后我将以下操作添加到HomeController中

public ActionResult Index()
{
    return View(new MyModel());
}

[HttpPost]
public ActionResult Index(MyModel model)
{
    if (!ModelState.IsValid)
    {
        // Will Always Be Invalid
    }

    return View(model);
}

还有一个名为nevervalid.js的javascript文件

$(function () {
    $.validator.addMethod("nevervalid", function () {
        return false;
    }, "Clientside Should Not Postback");

    $.validator.unobtrusive.adapters.addBool("nevervalid");
});

和索引视图

@model CustomAttribute.Models.MyModel

@{
    ViewBag.Title = "Home Page";
}

@using (Html.BeginForm())
{
    @Html.ValidationSummary(true)

    <fieldset>
        <legend>MyModel</legend>

        @Html.HiddenFor(model => model.Id)

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

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

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
    @Scripts.Render("~/Scripts/nevervalid.js")
}

我的web.config中的相关区域如下所示

<appSettings>
    <add key="webpages:Version" value="2.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="PreserveLoginUrl" value="true" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
</appSettings>

当页面加载时,加载以下文件(从chrome的F12下的网络选项卡获取)

http://localhost:7440/
http://localhost:7440/Content/site.css
http://localhost:7440/Scripts/modernizr-2.5.3.js
http://localhost:7440/Scripts/jquery-1.7.1.js
http://localhost:7440/Scripts/jquery.unobtrusive-ajax.js
http://localhost:7440/Scripts/jquery.validate.js
http://localhost:7440/Scripts/jquery.validate.unobtrusive.js
http://localhost:7440/Scripts/nevervalid.js

我的自定义属性将相关的查找数据添加到第一个名称输入中,如此...

    <input class="text-box single-line valid" data-val="true" data-val-nevervalid="Serverside Will Never Validate" id="FirstName" name="FirstName" type="text" value="">

所以,我问你,为什么哦为什么这个东西必须回发做服务器端验证,而我在这里有一些完美的javascript代码？在某个山顶上的一个没有月亮的夜晚,我是否必须牺牲一些动物？

Answer 1

我想知道如果你改变了nevervalid.js会发生什么,以便代码在文档准备好之前执行.

我的基本思想是,当dom准备就绪时,通过解析文档来进行不显眼的验证...但如果你在同一时间/之后加载自定义验证内容,它就不会知道当它到来时该做什么您自定义验证数据属性.

无论如何,尝试将nevervalid.js改为简单地:

(function($) {
    $.validator.addMethod("nevervalid", function () {
        return false;
    }, "Clientside Should Not Postback");

    $.validator.unobtrusive.adapters.addBool("nevervalid");
})(jQuery);