Question

我以json字符串形式发送已排序的散列图数据，但在打印json数据时，它不会以现有形式打印。

json数据

{
    "409": "A T (C T)",
    "397": "A T (Government Model School)",
    "407": "A T (Junior)",
    "420": "A T (L T Adhoc Siksha Bandu)",
    "406": "A T (L T)",
    "408": "A T (Primary)",
    "500": "AT(JBT)",
    "402": "H M (High School)",
    "403": "H M (Junior)",
    "404": "H M (Primary)",
    "405": "Lecturer",
    "419": "Lecturer (Adhoc Siksha Bandu)",
    "401": "Principal",
    "398": "Siksha Acharya",
    "399": "Siksha Mitra"
}

打印数据时

我的创建下拉列表代码是：

 $.each(responseJson, function (key, value) {


                        $('#post_code').append(
                                $("<option></option>").text(value).val(key));
                    });

Answer 1

下拉数据看起来像是按key（397,398,399 ...）而不是value排序。

JavaScript对象没有订单。即使大多数浏览器按照相同的顺序迭代创建属性，也有no guarantee，因此对象不支持排序。

如果您需要可排序列表，则必须将其存储为对象数组：

var obj = [
    {key:"409", val:"A T (C T)"},
    {key:"397", val:"A T (Government Model School)"},
    {key:"407", val:"A T (Junior)"},
    {key:"420", val:"A T (L T Adhoc Siksha Bandu)"},
    {key:"406", val:"A T (L T)"},
    {key:"408", val:"A T (Primary)"},
    {key:"500", val:"AT(JBT)"},
    {key:"402", val:"H M (High School)"},
    {key:"403", val:"H M (Junior)"},
    {key:"404", val:"H M (Primary)"},
    {key:"405", val:"Lecturer"},
    {key:"419", val:"Lecturer (Adhoc Siksha Bandu)"},
    {key:"401", val:"Principal"},
    {key:"398", val:"Siksha Acharya"},
    {key:"399", val:"Siksha Mitra"}
];

$(document).ready(function() {
         $.each(obj,function(key,value)
         {
             var option = $('<option />').val(value.key).text(value.val);
        $("#dropDownDest").append(option);
         });
});

输出

工作小提琴： http://jsfiddle.net/yhD9A/512/

Answer 2

您的 responseJson 变量是一个对象。

“对象是一组无序的键/值对”

无法保证对象的排序。每次执行都可以选择不同的顺序最好将数据保存为数组。

打印时json数据排序

2 个答案: