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javascript - Javascript不适用于asp.net MVC中多选下拉列表的onchange事件

问题描述

我在 ASP.NET MVC 视图中有以下 Razor 代码

<div id="rolesValues" class="case-assignment-hide">       
        @Html.DropDownList("ddlRoleValues", new SelectList(@Model.Roles, "Key", "Value"), new {@id= "ddlRoleValues", @class = "form-control case-assignment-rule-use-values", multiple = "multiple" })
        <span class="field-validation-valid help-block" data-valmsg-replace="true"></span>
</div>

下面是我的javascript来捕捉dropdownlist我放在里面的更改事件$(document).ready(function ()

 $("#ddlRoleValues").on("change", function () {
            alert('I got the hit');

        });

我注意到，只要dropdownlist项目选择发生变化，这个事件就不会被触发。

以下是浏览器中呈现的 HTML

<div class="col-sm-4 case-assignment-rule-value-selection">
    <div class="select2-container select2-container-multi form-control case-assignment-rule-values" id="s2id_ddlRoleValues">
        <ul class="select2-choices">
            <li class="select2-search-choice">
                <div>Manager</div>
                <a href="#" onclick="return false;" class="select2-search-choice-close" tabindex="-1"></a>
            </li>
            <li class="select2-search-field">
                <input type="text" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false" class="select2-input" id="s2id_autogen1" style="width: 34px;">
            </li>
        </ul>
    </div>
    <select class="form-control case-assignment-rule-values select2-offscreen" id="CaseAssignmentRules[0].RuleValues" multiple="multiple" name="CaseAssignmentRules[0].RuleValues" tabindex="-1" data-val="true" data-val-required="This field is required.">
        <option value="aae">Manager</option>
        <option value="aad">Manager Supervisor</option>
        <option value="ab1">Accommodations Manager</option>
        <option value="ab0">Service Representative</option>
        <option value="84d">demo</option>
        <option value="ab2">Employee</option>
        <option value="ab4">Human Resource</option>
        <option value="aaf">Case Manager</option>
        <option value="ab3">Supervisor</option>
    </select>
    <span class="field-validation-valid help-block" data-valmsg-replace="true" data-valmsg-for="CaseAssignmentRules[0].RuleValues"></span>
</div>

我错过了什么吗？

标签： javascriptasp.net-mvcjquery-select2html-select

解决方案

// Try using the class instead of id 
$(document).on("change", ".case-assignment-rule-values", function () {
alert('I got the hit');
});

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