客户端非侵入式验证无法按预期进行

时间:2019-09-13 11:15:53

标签: asp.net-mvc client-side unobtrusive-validation custom-attributes

我正在为MVC应用程序实现自定义不干扰客户端JavaScript。当我按下“提交”按钮时,自定义验证方法([EnforceTrue]属性)会触发,但没有任何效果。在Submit事件中,尽管自定义方法返回了false值,但Form.valid()方法仍返回true。 (我将其硬编码为false)。

我已经阅读了有关Unovertrusive验证主题的Stackoverflow,发现了很多设计,选项,想法,建议等并没有真正帮助。我尝试通过nuget包引用代码库。我将代码移到了视图的顶部,而不是在底部。我使用更复杂的验证逻辑进行了尝试,但其行为仍然相同。最终,我将应用程序缩小为几行代码,以重现行为。

这是我的模型:提交之前,它包含一个必填的“名称”字段和一个需要选中的复选框。该复选框需要自定义验证。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Reflection; // AtLeastOneProperty
using System.Web.Mvc; // Client side Validation STuff (26/08/19)

namespace WebApplication7_POC.Models
{
    public class Consultant
    {

        [Required, Display(Name = "First name:"), MaxLength(80)]
        public string FIRSTNAME { get; set; } // FIRSTNAME

        [Display(Name = "I give my concent.")]
        [EnforceTrue]  // TEST 123
        public bool Concent { get; set; } // AccessAdditional

    }


    public class EnforceTrueAttribute : ValidationAttribute, IClientValidatable
    {
        public override bool IsValid(object value)
        {
            if (value == null) return false;
            if (value.GetType() != typeof(bool)) throw new InvalidOperationException("can only be used on boolean properties.");
            return (bool)value == true;
        }

        public override string FormatErrorMessage(string name)
        {
            return "The '" + name + "' field must be checked in order to continue.";
        }

        public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
        {
            yield return new ModelClientValidationRule
            {
                ErrorMessage = String.IsNullOrEmpty(ErrorMessage) ? FormatErrorMessage(metadata.DisplayName) : ErrorMessage,
                ValidationType = "enforcetrue"
            };
        }
    }
}

下面是视图。它在顶部实现用于Custom验证的JQuery。在底部,它捕获了Submit事件,然后检查表单是否已验证。 valid()。

@model WebApplication7_POC.Models.Consultant

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>

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

<script type="text/javascript">

    (function ($) {

        // TEST 123

        $.validator.addMethod("enforcetrue", function (value, element, param) {

            alert('client validation trigerred!');
            console.log(element);
            console.log(element.checked);

            return false;  // element.checked;
        });

        $.validator.unobtrusive.adapters.addBool("enforcetrue");


    }(jQuery));

</script>



@{
    ViewBag.Title = "Consultant";
}

<h2>Consultant</h2>


@using (Html.BeginForm("Consultant","Home",FormMethod.Post,new { id = "HelloForm" }))
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">
        <h4>Consultant</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })

        <div class="form-group">
            @Html.LabelFor(model => model.FIRSTNAME, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.FIRSTNAME, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.FIRSTNAME, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Concent, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                <div class="checkbox">
                    @Html.EditorFor(model => model.Concent)
                    @Html.ValidationMessageFor(model => model.Concent, "", new { @class = "text-danger" })
                </div>
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Submit it!" class="btn btn-default" />
            </div>
        </div>

    </div>
}



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


<script type="text/javascript">


    $(document).ready(function () {

        $("#HelloForm").submit(function () {

            alert('HelloForm submit trigerred');

            // https://stackoverflow.com/questions/53934575/asp-net-core-unobtrusive-client-side-validation-form-onsubmit-fires-even-on-vali

            if ($("#HelloForm").valid()) {
                // Show the Spinner

                alert('Valid!');


                // Sure this works, but it does not validate the custon validation rules.


                // $("#LoaderSpinner").show('hidden');
                // $(".overlay").show();

            } else {

                alert('Not Valid');

            }

        });


    });

</script>

有一个控制器可以处理回发,但是我的问题是进行客户端验证。

当按下提交按钮时,我希望当未选中复选框时,valid()方法将返回false,并在屏幕上显示错误消息(例如默认的[Required]属性正在执行)。

也许我这边只是一个疏忽之处?

1 个答案:

答案 0 :(得分:0)

删除

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

第二次包含jquery的代码段最终解决了该问题。