根据另一个选择框中的选择填充一个选择框-JQuery? [英] Populating One Select Box Based on the Selection in Another Select Box - JQuery?

问题描述

我正在尝试根据第一个选择框中的选择填充一个选择框.我上网查找了很多关于硬编码选项的有用信息，但是我需要从查询中获取选项(例如Coldfusion中的cfquery).我知道cfquery是服务器端的，所以我不能将它包含在我的jquery中，但是还有另一种选择吗?

I am trying to populate one select box based on the selection made in the first select box. I've looked online, and found a lot of helpful information on hard-coded options, but I need my options to come from a query (like cfquery in coldfusion). I know that a cfquery is server-side, so I cannot include it in my jquery, but is there another option?

我正在使用以下示例:

HTML:

<select id="counties">
    <option> </option>
    <option> somerset </option>
    <option> hertfordshire </option>
</select>

<select id="towns" disabled="true">
</select>

JS:

var countyTowns = [
    ["Bath", "Bristol"],
    ["Letchworth", "Hitchin"]
];

$("#counties").change(function() {
    var county = this.selectedIndex - 1;
    $("#towns").empty();
    if (county === -1) {
        $("#towns").attr("disabled", true);
    } else {
        var towns = countyTowns[county];
        for (var i = 0; i < towns.length; i++) {
            $("#towns").append($("<option></option>").text(towns[i]));
        }
        $("#towns").attr("disabled", false);
    }
});

我需要的是城镇是动态的，并且能够从数据库中读取.

What I would need is for towns to be dynamic, and able to be read from a database.

任何帮助将不胜感激！

谢谢

推荐答案

这里有一些示例:

• http://www. 9lessons.info/2010/08/dynamic-dependent-select-box-using.html (也许是最好的，从这里开始)

• http://www.9lessons.info/2010/08/dynamic-dependent-select-box-using.html (Maybe the best, start here)

http://blog.chapagain .com.np/using-jquery-ajax-populate-selection-list/

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