下拉框取决于在另一个下拉框中选择的选项

时间:2013-11-01 14:22:10

标签: javascript jquery html forms drop-down-menu

我在表单中有两个不同的SELECT OPTION。

第一个是Source,第二个是Status。我希望在我的状态下拉列表中有不同的OPTIONS,具体取决于我在Source下拉列表中选择的OPTION。

来源:

<select id="source" name="source">
     <option>MANUAL</option>
     <option>ONLINE</option>
</select>

状态:

<select id="status" name="status">

</select>

选项: - 如果Source为MANUAL,则Status为OPEN或DELIVERED - 如果Source为ONLINE,则Status为OPEN或DELIVERED或SHIPPED

我的非工作尝试:

            <script>
            $(document).ready(function () {
            var option = document.getElementById("status").options;
            if (document.getElementById('source').value == "MANUAL") {
                $("#status").append('<option>OPEN</option>');
                $("#status").append('<option>DELIVERED</option>');
                }
            if (document.getElementById('source').value == "ONLINE") {
                $("#status").append('<option>OPEN</option>');
                $("#status").append('<option>DELIVERED</option>');
                $("#status").append('<option>SHIPPED</option>');
                }
            });
            </script>

8 个答案:

答案 0 :(得分:5)

尝试这样的事情...... jsfiddle demo

<强> HTML

 Source:   <select id="source" name="source">
     <option>MANUAL</option>
     <option>ONLINE</option> </select>

Status:

<select id="status" name="status">
    <option>OPEN</option>
      <option>DELIVERED</option>
    </select>

<强> JS

$(document).ready(function() {

  $("#source").change(function() {

    var el = $(this) ;

    if(el.val() === "ONLINE" ) {
    $("#status").append("<option>SHIPPED</option>");
    }
      else if(el.val() === "MANUAL" ) {
        $("#status option:last-child").remove() ; }
  });

});

答案 1 :(得分:3)

我发布这个答案,因为这样你就永远不需要任何插件,比如jQuery和其他任何插件,这就是简单的javascript解决方案。

<html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <script language="javascript" type="text/javascript">
    function dynamicdropdown(listindex)
    {
        switch (listindex)
        {
        case "manual" :
            document.getElementById("status").options[0]=new Option("Select status","");
            document.getElementById("status").options[1]=new Option("OPEN","open");
            document.getElementById("status").options[2]=new Option("DELIVERED","delivered");
            break;
        case "online" :
            document.getElementById("status").options[0]=new Option("Select status","");
            document.getElementById("status").options[1]=new Option("OPEN","open");
            document.getElementById("status").options[2]=new Option("DELIVERED","delivered");
            document.getElementById("status").options[3]=new Option("SHIPPED","shipped");
            break;
        }
        return true;
    }
    </script>
    </head>
    <title>Dynamic Drop Down List</title>
    <body>
    <div class="category_div" id="category_div">Source:
        <select id="source" name="source" onchange="javascript: dynamicdropdown(this.options[this.selectedIndex].value);">
        <option value="">Select source</option>
        <option value="manual">MANUAL</option>
        <option value="online">ONLINE</option>
        </select>
    </div>
    <div class="sub_category_div" id="sub_category_div">Status:
        <script type="text/javascript" language="JavaScript">
        document.write('<select name="status" id="status"><option value="">Select status</option></select>')
        </script>
        <noscript>
        <select id="status" name="status">
            <option value="open">OPEN</option>
            <option value="delivered">DELIVERED</option>
        </select>
        </noscript>
    </div>
    </body>
</html>

有关详细信息,我的意思是要制作动态且更具依赖性,请查看我的文章create dynamic drop-down list

答案 2 :(得分:1)

this jsfiddle中,您会找到我设计的解决方案。我的想法是在html中有一个选择器对,并使用(plain)javascript根据第一个选择的选项过滤依赖选择器中的选项。例如:

<select id="continents">
 <option value = 0>All</option>   
 <option value = 1>Asia</option>
 <option value = 2>Europe</option>
 <option value = 3>Africa</option>
</select> 
<select id="selectcountries"></select>

使用(在jsFiddle中)

 MAIN.createRelatedSelector
     ( document.querySelector('#continents')           // from select element
      ,document.querySelector('#selectcountries')      // to select element
      ,{                                               // values object 
        Asia: ['China','Japan','North Korea',
               'South Korea','India','Malaysia',
               'Uzbekistan'],
        Europe: ['France','Belgium','Spain','Netherlands','Sweden','Germany'],
        Africa: ['Mali','Namibia','Botswana','Zimbabwe','Burkina Faso','Burundi']
      }
      ,function(a,b){return a>b ? 1 : a<b ? -1 : 0;}   // sort method
 );

答案 3 :(得分:1)

    function dropdownlist(listindex)
    {
         document.getElementById("ddlCity").options.length = 0;
         switch (listindex) 
         {
             case "Karnataka":
                     document.getElementById("ddlCity").options[0] = new Option("--select--", "");
                     document.getElementById("ddlCity").options[1] = new Option("Dharawad", "Dharawad");
                     document.getElementById("ddlCity").options[2] = new Option("Haveri", "Haveri");
                     document.getElementById("ddlCity").options[3] = new Option("Belgum", "Belgum");
                     document.getElementById("ddlCity").options[4] = new Option("Bijapur", "Bijapur");

                 break;

             case "Tamilnadu":
                 document.getElementById("ddlCity").options[0] = new Option("--select--", "");
                 document.getElementById("ddlCity").options[1] = new Option("dgdf", "dgdf");
                 document.getElementById("ddlCity").options[2] = new Option("gffd", "gffd");


                 break;
         }

    }
            

                                 *                     州:                                       - 选择 -                     卡纳塔克邦                     泰米尔纳德                     安德拉普拉德什                     Telngana                                               

        
    <div>
        <p>

            <label id="lblCt">
            <span class="red">*</span>
                City:</label>
            <select id="ddlCity">
               <!-- <option>--Select--</option>
                <option value="1">Dharawad</option>
                <option value="2">Belgum</option>
                <option value="3">Bagalkot</option>
                <option value="4">Haveri</option>
                <option>Hydrabadh</option>
                <option>Vijat vada</option>-->
            </select>
            <label id="lblCity"></label>
        </p>
    </div>

答案 4 :(得分:0)

你最好制作两个selects并在隐藏另一个时显示一个。{/ p>

它更容易,使用您的方法向options添加selects将无法在IE8中使用(如果您愿意的话)。

答案 5 :(得分:0)

我希望以下代码可以帮助或解决您的问题,或者您认为不可理解的访问http://phppot.com/jquery/jquery-dependent-dropdown-list-countries-and-states/

HTML DYNAMIC DEPENDENT SELECT

insert into table t1 select * from t2 where t2.id not in (select id from t1);

通过AJAX获取状态

<div class="frmDronpDown">
<div class="row">
    <label>Country:</label><br/>
    <select name="country" id="country-list" class="demoInputBox" onChange="getState(this.value);">
    <option value="">Select Country</option>
    <?php
    foreach($results as $country) {
    ?>
    <option value="<?php echo $country["id"]; ?>"><?php echo $country["name"]; ?></option>
    <?php
    }
    ?>
    </select>
</div>
<div class="row">
    <label>State:</label><br/>
    <select name="state" id="state-list" class="demoInputBox">
    <option value="">Select State</option>
    </select>
</div>

使用PHP阅读状态数据库

<script> function getState(val) { $.ajax({
type: "POST",
url: "get_state.php",
data:'country_id='+val,
success: function(data){
    $("#state-list").html(data);
}
});} </script>

答案 6 :(得分:0)

为此,我注意到最好显示和隐藏标签,而不是为DOM添加和删除标签。这样效果更好。

答案 7 :(得分:0)

应更新答案以替换已失效的函数 .change & .ready

$(document).on('ready',function()  {

    $("#source").on('change', function(){
        var el = $(this);
        if (el.val() === "ONLINE") {
            $("#status").append("<option>SHIPPED</option>");
        } else if (el.val() === "MANUAL") {
            $("#status option:last-child").remove();
        }
    });

});