根据从下拉菜单中选择的选项创建查询字符串

Creating a querystring based on what option is selected from a drop down menu

本文关键字:选项 创建 查询 字符串 选择 下拉菜单      更新时间:2023-09-26

我有这个下拉菜单:

<select name="Filter" onchange="applyFilter(this);">
<option name="Item1" id=Item1 value="10.5">Test1</option>
<option name="Item2" id=Item2 value="27">Test2</option>
<option name="Item3" id=Item3 value="31">Test3</option>
</select>

我仍在学习javascript,并试图编写一个函数来生成/加载查询字符串URL,并将所选项目的值作为参数传递。下拉菜单中的每个选项都需要有自己的ID。这是我迄今为止的代码:

<script language="javascript1.2" type="text/javascript">
function applyFilter()
{ 
var currentQS = '';
var currentObject;
var currentURL = '' + window.location.href;
currentQS = unescape(window.location.search);
var newQS = '';
currentObject = document.getElementById('Item1');
newQS = $Querystring(newQS).set(currentObject.name,currentObject.value).toString();
newQS = newQS.substring(1,newQS.length);
currentObject = document.getElementById('Item2');
newQS = $Querystring(newQS).set(currentObject.name,currentObject.value).toString();
newQS = newQS.substring(1,newQS.length);
currentObject = document.getElementById('Item3');
newQS = $Querystring(newQS).set(currentObject.name,currentObject.value).toString();
newQS = newQS.substring(1,newQS.length);
var newURL = 'http://' + location.hostname + location.pathname + '?' + newQS;
window.location = newURL;
}
</script>

如有任何帮助,我们将不胜感激。

不确定$Querystring指的是什么,但应该可以这样做:

document.getElementsByName('Filter')[0].addEventListener('change', function() {
    window.location = 'http://' + location.hostname + location.pathname + '?' + this.name + '=' + this.options[this.selectedIndex].value;
});

然而,选择菜单可能不是你想要做的事情的最佳选择。看看这篇博客文章:http://uxmovement.com/forms/stop-misusing-select-menus/