jQWidgets jqxDropDownList valueMember属性

jQWidgets jqxDropDownList valueMember属性

介绍:jQWidgets是一个JavaScript框架,用于为PC和移动设备制作基于Web的应用程序。它是一个非常强大的、优化的、与平台无关的、并被广泛支持的框架。jqxDropDownList部件是一个jQuery下拉列表,它包含了一个显示在下拉列表中的可选择项目的列表。

valueMember_属性用于设置或返回项目的valueMember。这个属性指定一个对象属性的名称,作为列表项的 “值 “来设置。它接受字符串类型的值,其默认值为””。

语法:

设置valueMember属性。

$('selector').jqxDropDownList({ valueMember: String });

返回valueMember属性。

var valueMember = $('selector').jqxDropDownList('valueMember');

链接的文件:从链接中下载jQWidgets。在HTML文件中,找到下载文件夹中的脚本文件。

<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<link rel=”stylesheet” href=”jqwidgets/styles/jqx.energyblue.css”>
<script type=”text/javascript” src=”scripts/jquery-1.11.1.min.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqx-all.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxbuttons.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxscrollbar.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxlistbox.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdropdownlist.js”></script>

例子:下面的例子说明了jQWidgets中jqxDropDownList valueMember属性。

<!DOCTYPE html>
<html lang="en">
  
<head>
    <link rel="stylesheet" href=
        "jqwidgets/styles/jqx.base.css" type="text/css" />
    <link rel="stylesheet" href=
        "jqwidgets/styles/jqx.energyblue.css">
    <script type="text/javascript" 
        src="scripts/jquery-1.11.1.min.js"></script>
    <script type="text/javascript" 
        src="jqwidgets/jqx-all.js"></script>
    <script type="text/javascript" 
        src="jqwidgets/jqxcore.js"></script>
    <script type="text/javascript" 
        src="jqwidgets/jqxbuttons.js"></script>
    <script type="text/javascript" 
        src="jqwidgets/jqxscrollbar.js"></script>
    <script type="text/javascript" 
        src="jqwidgets/jqxlistbox.js"></script>
    <script type="text/javascript" 
        src="jqwidgets/jqxdropdownlist.js"></script>
</head>
  
<body>
    <center>
        <h1 style="color: green;">
            GeeksforGeeks
        </h1>
  
        <h3>
            jQWidgets jqxDropDownList valueMember Property
        </h3>
  
        <div id='jqxDDL'></div>
    </center>
    <script type="text/javascript">
        (document).ready(function() {
            var data = [{
                index: 0,
                subject: "Computer Science"
            }, {
                index: 0,
                subject: "C Programming"
            }, {
                index: 0,
                subject: "C++ Programming"
            }, {
                index: 0,
                subject: "Java Programming"
            }, {
                index: 0,
                subject: "Python Programming"
            }, {
                index: 0,
                subject: "HTML"
            }, {
                index: 0,
                subject: "CSS"
            }, {
                index: 0,
                subject: "JavaScript"
            }, {
                index: 0,
                subject: "jQuery"
            }, {
                index: 0,
                subject: "PHP"
            }, {
                index: 0,
                subject: "Bootstrap"
            }];
  
            ("#jqxDDL").jqxDropDownList({
                source: data,
                theme: 'energyblue',
                displayMember: 'subject',
                valueMember: 'index'
            });
  
            $("#jqxDDL").on('change', function (event) {
                alert("label: " + event.args.item.label 
                + ", value: " + event.args.item.index);
            });
        });
    </script>
</body>
  
</html

输出:

jQWidgets jqxDropDownList valueMember属性

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