与标题相比,我的实际问题相当复杂。我对JavaScript和jquery很新,所以请耐心等待。jquery - 如何从HTML选择中删除选定的选项?
我会申明你在阅读我的问题之前先运行这段代码,这样你才能明白我在做什么。
<html>
<head>
<script type="text/javascript" src="jquery1.6.4min.js"></script>
<script type="text/javascript" >
var selectedAddFootballPlayerId = '';
var selectedAddFootballPlayerName = '';
var selectedRemoveFootballPlayerId = '';
var selectedRemoveFootballPlayerName = '';
$(document).ready(function() {
$('#listboxFootballPlayers option').click(function() {
selectedAddFootballPlayerId = $(this).attr('value');
selectedAddFootballPlayerName = $(this).text();
});
$('#selectedFootballPlayers option').click(function() {
selectedRemoveFootballPlayerId = $(this).attr('value');
selectedRemoveFootballPlayerName = $(this).text();
});
$('input#btnAddFootballPlayerToList').click(function() {
if (selectedAddFootballPlayerId == '') {
alert("Select a football player to be added from the list.");
} else {
var option = new Option(selectedAddFootballPlayerName , selectedAddFootballPlayerId);
$(option).html(selectedAddFootballPlayerName);
$('#selectedFootballPlayers').append(option);
selectedAddFootballPlayerId = '';
selectedAddFootballPlayerName = '';
}
});
$('input#btnRemoveFootballPlayerFromList').click(function() {
if (selectedRemoveFootballPlayerId == '') {
alert("Select a football player to be removed from the list.");
} else {
var option = new Option(selectedRemoveFootballPlayerName , selectedRemoveFootballPlayerId);
$(option).html(selectedRemoveFootballPlayerName);
$('#listboxFootballPlayers').append(option);
selectedRemoveFootballPlayerId = '';
selectedRemoveFootballPlayerName = '';
}
});
});
</script>
</head>
<body>
<table>
<tr>
<td>
<select id="listboxFootballPlayers" size="5" multiple="multiple" style="width: 200px;">
<option value="l1">Cristiano Ronaldo</option>
<option value="l2">Ricardo Kaka</option>
<option value="l3">Lionel Messi</option>
<option value="l4">Gerd Muller</option>
<option value="l5">Johan Crujjf</option>
<option value="l6">Franz Beckenbauer</option>
<option value="l7">David Beckham</option>
</select>
</td>
<td>
<table>
<tr><td><input type="button" id="btnAddFootballPlayerToList" value="->" /> </td></tr>
<tr><td><input type="button" id="btnRemoveFootballPlayerFromList" value="<-" /></td></tr>
</table>
</td>
<td>
<select id="selectedFootballPlayers" size="5" multiple="multiple" style="width: 200px;"></select>
</td>
</tr>
</table>
</body>
</html>
之前,我先从问题,请注意:
#listboxFootballPlayers
- 列表框左侧
#selectedFootballPlayers
- 在右侧
列表框我有2个问题:
1.)在点击->
按钮后,如何从#listboxFootballPlayers
中删除所选项目/选项。
2)为什么当我在<-
点击我从#selectedFootballPlayers
选定的项目/选项后,它给了我一个消息Select a football player to be removed from the list.
在我看来,它并不能对变量selectedRemoveFootballPlayerId
赋值。
请问我是否有些问题不清楚。请帮忙。提前致谢。
顺便说一句这里是的jsfiddle链接:
如果您发布工作中的jsfiddle代码或链接到一个网站您将获得更好的答案,让我们不必做尽可能多打字 –
不要试图挑选的运动员存储在每次点击一个选项时都会变量,为什么当单击 - >(或< - )按钮时,您只是从选择框中获取选定的选项?这将使它更简单,可以允许多选,通过键盘而不是鼠标进行选择等。 –
@BrianHoover好吧,我会尝试jsfiddle。这将是我第一次。 – NinjaBoy