Question

我在asp.net的hiddenfield中有下一个文本，这个值是Json序列化

text = "[{ "Element":"E001", "City":"Madrid", "Country":"Spain"},
    { "Element":"E003", "City":"Paris", "Country":"Italy"},
    { "Element":"A001", "City":"Pekin", "Country":"China"}]

我想改变像这样的

这样的JS函数的元素的值

function ModificarDato(jsonelemento, jsonvalor)
{
    var vjson = eval($("[ id$='H_Ins").val());
    var vjson2 = `$`(jQuery.parseJSON(JSON.stringify(vjson))).each(function ()
    {
        var vElemento = this.Element;
        var vCity = this.City;
        var vValor = this.Country;

        if (vElemento == jsonelemento)
        {
            this.Country = jsonvalor;
        }
    });

    var jsonvalorfinal = JSON.stringify(vjson2);

    alert("Valor final : " + jsonvalorfinal);
    $("[ id$='H_Ins").val(jsonvalorfinal);
}

问题在于，当我将jsonvalorfinal放入隐藏字段时，文本是不同的

text = "{"0":{"Element":"E001", "City":"Madrid", "Country":"Spain"},
    "1":{"Element":"E003", "City":"Paris", "Country":"France"},
    "2":{"Element":"A003", "City":"Pekin", "Country":"China"},
    "length":3}

我需要相同格式的第一个字符串才能继续使用另一个函数。它可能

由于

Answer 1

您可以按照以下方式执行此操作，您可以找到要更新的对象的索引并更新其国家/地区属性。

function ModifyData(element, newCountryValue) {
  let text = `[
    {
        "Element": "E001",
        "City": "Madrid",
        "Country": "Spain"
    },
    {
        "Element": "E003",
        "City": "Paris",
        "Country": "Italy"
    },
    {
        "Element": "A001",
        "City": "Pekin",
        "Country": "China"
    }
]`;

  let parsedArray = JSON.parse(text);

  let indexToBeModified = parsedArray.findIndex(item => item.Element == element);

  parsedArray[indexToBeModified].Country = newCountryValue;

  return parsedArray;

}

let modifiedArray = JSON.stringify(ModifyData("E001", "United States"), null, 4);

$("[ id$='H_Ins").val(modifiedArray);

更改Json数组的值并放入Hiddenfield

1 个答案: