如何从 JavaScript(HTML) 中的 JSON 对象获取没有键的值

Question

 [17/02/2020] [18/02/2020] [19/02/2020] itemseq 1 Allocated 2 6 7 itemname 2 Out Of Order 0 0 0

 success: function (result) { debugger; var Item1 = JSON.parse(result.Item1) if (Item1.length == 0) { $('<tr><td colspan="4">No Record Found</td></tr>').appendTo($('#Tablev')); } $('#Tablev tr:not(:first)').empty(); $('<tr>' + '<th ' + item.itemseq+ '</th>' + '<th>' + item.itemname + '</th>' + (need to get the Date and date values like we got the above 2 things) '</tr>').appendTo($('#Tablev')); });

我正在尝试为 eg-(dates "16/02/2020"):添加键值：以及它包含的值 (0)并将它们显示在网格上，我设法获得了itemseq和itemname但我不知道如何获取其他两个键值。 日期和值是从用户输入日期范围内的 mssql 接收的。

我收到的 JavaScript 中的 JSON 字符串是（json 字符串一直在运行，这是代码的一半）

[
  {
    "itemseq": 1,
    "itemname": "Allocated",
    "17/02/2020": 2,
    "18/02/2020": 6,
    "19/02/2020": 7,
    "20/02/2020": 3,
    "21/02/2020": 7,
    "22/02/2020": 6,
    "23/02/2020": 2,
    "24/02/2020": 5
  },
  {
    "itemseq": 2,
    "itemname": "Out Of Order",
    "17/02/2020": 0,
    "18/02/2020": 0,
    "19/02/2020": 0,
    "20/02/2020": 0,
    "21/02/2020": 0,
    "22/02/2020": 0,
    "23/02/2020": 0,
    "24/02/2020": 0
  },
  {
    "itemseq": 3,
    "itemname": "Daily Occupancy %",
    "17/02/2020": 28.57,
    "18/02/2020": 85.71,
    "19/02/2020": 100,
    "20/02/2020": 42.85,
    "21/02/2020": 100,
    "22/02/2020": 85.71,
    "23/02/2020": 28.57,
    "24/02/2020": 71.42
  }
]  

我怎么能取它包含“（日期）18/02/2020”的日期和日期的值：（值）85.71，

当我们使用字符串时，我们可以打破字符串并获得像 (item.itemseq item.itemname) 这样的值，我想知道如何获得日期值和日期值，因为这些数据被传递到网格和会在那里使用..
例如-列-日期 [18/02/2020] [19/02/2020] 和行明智我们有 [Allocated][Out Of Order] 特定日期它应该包含日期的值 [85.71] [100]

Answer 1

尝试这个

const json = [{"itemseq":1,"itemname":"Allocated","17/02/2020":2.0000,"18/02/2020":6.0000,"19/02/2020":7.0000,"20/02/2020":3.0000,"21/02/2020":7.0000,"22/02/2020":6.0000,"23/02/2020":2.0000,"24/02/2020":5.0000},{"itemseq":2,"itemname":"Out Of Order","17/02/2020":0.0000,"18/02/2020":0.0000,"19/02/2020":0.0000,"20/02/2020":0.0000,"21/02/2020":0.0000,"22/02/2020":0.0000,"23/02/2020":0.0000,"24/02/2020":0.0000},{"itemseq":3,"itemname":"Daily Occupancy %","17/02/2020":28.5700,"18/02/2020":85.7100,"19/02/2020":100.0000,"20/02/2020":42.8500,"21/02/2020":100.0000,"22/02/2020":85.7100,"23/02/2020":28.5700,"24/02/2020":71.4200}]

json.map((item) => {
 console.log(item["21/02/2020"])
})

它将返回：

7
0
100

Answer 2

如果您的意思是为每个项目添加一个值，您可以试试这个

 let data = [ {"itemseq":1,"itemname":"Allocated","17/02/2020":2.0000,"18/02/2020":6.0000,"19/02/2020":7.0000,"20/02/2020":3.0000,"21/02/2020":7.0000,"22/02/2020":6.0000,"23/02/2020":2.0000,"24/02/2020":5.0000}, {"itemseq":2,"itemname":"Out Of Order","17/02/2020":0.0000,"18/02/2020":0.0000,"19/02/2020":0.0000,"20/02/2020":0.0000,"21/02/2020":0.0000,"22/02/2020":0.0000,"23/02/2020":0.0000,"24/02/2020":0.0000}, {"itemseq":3,"itemname":"Daily Occupancy %","17/02/2020":28.5700,"18/02/2020":85.7100,"19/02/2020":100.0000,"20/02/2020":42.8500,"21/02/2020":100.0000,"22/02/2020":85.7100,"23/02/2020":28.5700,"24/02/2020":71.4200} ]; let copy = []; data.forEach((item) => { item["16/02/2020"] = 0; copy.push(item); }); console.log(copy);

"16/02/2020" 索引添加了 value : 0 到每个项目