Question

我有这个json文件，我附加到html。

"{\"Item1\":[{\"Id\":2,\"Title\":\"Support\",\"Items\":8},{\"Id\":5,\"Title\":\"Datacenter\",\"Items\":5},{\"Id\":3,\"Title\":\"Bogholderiet\",\"Items\":5},{\"Id\":8,\"Title\":\"Helpdesk\",\"Items\":4},{\"Id\":9,\"Title\":\"SLA og VIP\",\"Items\":1},{\"Id\":7,\"Title\":\"Hostmaster\",\"Items\":1}],\"Item2\":[{\"Id\":7,\"FullName\":\"p11\",\"Items\":5},{\"Id\":17,\"FullName\":\"p8\",\"Items\":3},{\"Id\":9,\"FullName\":\"p10\",\"Items\":3},{\"Id\":8,\"FullName\":\"p6\",\"Items\":3},{\"Id\":3,\"FullName\":\"p1\",\"Items\":3},{\"Id\":5,\"FullName\":\"p2\",\"Items\":2},{\"Id\":16,\"FullName\":\"p3\",\"Items\":1},{\"Id\":11,\"FullName\":\"p4\",\"Items\":1}]}"

我的问题是如何才能追加＆＃34; SLA og VIP＆＃34;的价值。在代码下面，我可以访问Item1的数组并将其附加到html。

if (key === 'Item1') {
value[key].forEach(function (val) {
var tbl3Row = "<tr " + (parseInt(val.TotalUnresolvedItems) > 3 ? " class='colorgul'" : "") + (parseInt(val.TotalUnresolvedItems) < 4 ? " class='colorgreen'" : "") + ">" + "<td>" + val.Title + "</td>" + "<td>" + val.TotalUnresolvedItems + "</td>" + "</tr>"
table3Rows += tbl3Row;                                   
 })
 }

但现在我只是试图访问标题值＆＃34; SLA og VIP＆＃34;。这是我设法找到的公式：

parsedData.Item1[4]

我只是不知道如何在此代码中使用它：

if (key === 'Item1') {
value[key].forEach(function (val) {
var tbl3Row = "<tr " + (parseInt(val.TotalUnresolvedItems) > 3 ? " class='colorgul'" : "") + (parseInt(val.TotalUnresolvedItems) < 4 ? " class='colorgreen'" : "") + ">" + "<td>" + val.Title + "</td>" + "<td>" + val.TotalUnresolvedItems + "</td>" + "</tr>"
table3Rows += tbl3Row;                                   
 })
 }

Answer 1

你可以[].prototype.filter()：

因为它会让您过滤到您需要定位的确切对象。在你的情况下它是

{
  "Id": 9,
  "Title": "SLA og VIP",
  "Items": 1
}

通过这种方式，您可以获得过滤后的对象的属性，例如Id, Title, Items。

if (key === 'Item1') {
  var obj = value[key].filter(function(item){
     return item.Title === "SLA og VIP"
  })[0];

  // now use obj.Title, output: "SLA og VIP"

  value[key].forEach(function(val) {
    var tbl3Row = "<tr " + (parseInt(val.TotalUnresolvedItems) > 3 ? "...</tr>"
    table3Rows += tbl3Row;
  })
}

＆＃13;

var json = "{\"Item1\":[{\"Id\":2,\"Title\":\"Support\",\"Items\":8},{\"Id\":5,\"Title\":\"Datacenter\",\"Items\":5},{\"Id\":3,\"Title\":\"Bogholderiet\",\"Items\":5},{\"Id\":8,\"Title\":\"Helpdesk\",\"Items\":4},{\"Id\":9,\"Title\":\"SLA og VIP\",\"Items\":1},{\"Id\":7,\"Title\":\"Hostmaster\",\"Items\":1}],\"Item2\":[{\"Id\":7,\"FullName\":\"p11\",\"Items\":5},{\"Id\":17,\"FullName\":\"p8\",\"Items\":3},{\"Id\":9,\"FullName\":\"p10\",\"Items\":3},{\"Id\":8,\"FullName\":\"p6\",\"Items\":3},{\"Id\":3,\"FullName\":\"p1\",\"Items\":3},{\"Id\":5,\"FullName\":\"p2\",\"Items\":2},{\"Id\":16,\"FullName\":\"p3\",\"Items\":1},{\"Id\":11,\"FullName\":\"p4\",\"Items\":1}]}";

var obj = JSON.parse(json)["Item1"].filter(function(item) {
  return item.Title === "SLA og VIP"
})[0];

console.log(obj);

＆＃13;

访问json文件中的数组值

1 个答案: