Jquery在添加规则时验证抛出错误答案

【问题标题】：Jquery validate throwing error when adding a ruleJquery在添加规则时验证抛出错误
【发布时间】：2017-04-09 05:18:28
【问题描述】：

当我的 js 页面加载并创建如下所示的规则时，我从 jquery.validate.js 库第 138 行抛出一个错误，提示“无法读取未定义的属性‘设置’”

settings = $.data( element.form, "validator" ).settings;

这是我要添加的规则和我要添加的表单

$('#zipCodeText').rules("add", {
  required: true,
  minlength: 5,
  maxlength: 5,
  messages: {
    required: "Required input",
    minlength: jQuery.validator.format("Please, {0} characters are necessary"),
    maxlength: jQuery.validator.format("Please, {0} characters are necessary")
  }
});

@using (Html.BeginForm("SaveLocation", "Manage", FormMethod.Post, new { @class = "form-horizontal", @id = "registerForm", role = "form" })) {
<div class="form-group">
  <label for="countryList">Country</label>
  <br />@Html.EnumDropDownListFor(m => m.Countries, null, new { @id = "countryList", @class = "selectpicker btn-group-lg" })
</div>

<div id="zipCodeGroup" class="form-group has-feedback" style="display: @(Model.Country == 0 ? " " : "none ");">
  <label for="zipCodeText">ZipCode</label>
  <input type="number" min="5" max="5" class="form-control input-lg" id="zipCodeText" placeholder="e.g. 94102" value="@Model.ZipCode">
  <label id="zipCodeMessage" style="display: none;"></label>
</div>
<div id="locationGroup" class="form-group has-feedback" style="display: @(Model.Country == 0 ? " none " : " ");">
  <label for="locationText">Location</label>
  <input type="text" min="4" max="40" class="form-control input-lg" id="locationText" placeholder="e.g. San Francisco" value="@Model.Location">
  <label id="locationMessage" style="display: none;"></label>
</div>

<input type="button" value="Save" id="yogaLocationSave" class="btn btn-primary btn-lg" />
<input type="button" value="Cancel" id="yogaLocationCancel" class="btn btn-default btn-lg" />}

【问题讨论】：

在 html 中创建 zipCodeText 元素后是否设置规则？
是的，我只是单步执行它以确保在 js 之前首先呈现 HTML。我什至尝试将规则放在按钮点击中，所以在我点击表单上的按钮之前它甚至不会被创建！

标签： javascript jquery html asp.net-mvc jquery-validate

【解决方案1】：

JavaScript 运行时错误：无法获取未定义或空引用的属性“设置””

您必须首先通过在表单元素上调用.validate() 方法来初始化插件。

$('#yourform').validate({ // <-- INITIALIZE the plugin on your form
    // any options, rules, or callbacks
});

【讨论】：