如何從.json文件中獲取特定值

Question

我有一個JSON文件，我需要捕獲一個特定的鍵值才能在這里執行我的JSON代碼

{
    "uri": "https://wmg.nfa.futures.org/news/EnforceRegActions5imple.aspx",

      "children": [
    {
        "uri": "https://www.nfa.futures.ortnews/EnforceRegActions5imple.aspx#145View%209%28e1233a13%401",
        "children": [
            {
                "uri": "httpsghomm nfa futures org/news/EnforceReeActions5imple aspx#114Rule4%28e6ea03f2%400%40145View%209%28e1233a13%401",
                "title": "Compliance Rules : Rule 2-2 : Rule",
                "type": "Enforcement and Registration Actions : Rule",
                "publishedDate": "2019-08-15",
                "cachedDateTimeOffset": "0001-01-01700:00:00+00:00",

            },
            {
                "uri": "httos./Pv'm nfa futures ore/news/EnforceReioctions5imple 
          aspx#114Rule4%28e6ea03f2%401%40145view%209%28e1233a13%401",
                "title": "Compliance Rules : Rule 2-4 : Rule",
                "type": "Enforcement and Registration Actions : Rule",
                "publishedDate": "2019-08-15",
                "cachedDateTimeOffset": "0001-01-01T00:00:00+00:00",

            }
        ]
    "children": [
        {
            "uri": "https://www.nfa.futures.ortnews/EnforceRegActions5imple.aspx#145View%209%28e1233a13%401",
            "children": [
                {
                    "uri": "httpsghomm nfa futures org/news/EnforceReeActions5imple aspx#114Rule4%28e6ea03f2%400%40145View%209%28e1233a13%401",
                    "title": "Compliance Rules : Rule 2-2 : Rule",
                    "type": "Enforcement and Registration Actions : Rule",
                    "publishedDate": "2019-08-15",
                    "cachedDateTimeOffset": "0001-01-01700:00:00+00:00",
                    "html": "<span data-rule-id=\"RULE 2-2\" data-rule-section=\"4\" data-rule-sub-section=\"0\" class.\"btn-add-rule\" data-cube-level=\"2\" data-cube-scope=\"7404961\">Rule</span>"
                },
                {
                    "uri": "httos./Pv'm nfa futures ore/news/EnforceReioctions5imple aspx#114Rule4%28e6ea03f2%401%40145view%209%28e1233a13%401",
                    "title": "Compliance Rules : Rule 2-4 : Rule",
                    "type": "Enforcement and Registration Actions : Rule",
                    "publishedDate": "2019-08-15",
                    "cachedDateTimeOffset": "0001-01-01T00:00:00+00:00",
                    "html": "<span data-rule-id=\"RuLE 2-4\" data-rule-section=\"4\" data-rule-sub-section=\"0\" class=\"btn-add-rule\" data-cube-level=\"2\" data-cube-scope=\"64787825\">Rule</span>"
                }
            ]
        }
    ]
}

如您在圖像中看到的，我需要Html部分來捕捉使用C＃代碼，我能夠以對象的JSON形式獲取此代碼，但是我無法將此Html值選擇為變量

  using (StreamReader r = new StreamReader("US--NFA--INS--ENFORCE.structure.json"))
        {
            string json = r.ReadToEnd();
            var parsed = JObject.Parse(json);

當我調試時，我可以看到所有的值，但是我不能選擇特定的值，所以我也嘗試了SElECTED令牌，但是沒有運氣。

我的問題是，這有兩個孩子json一個有HTML密鑰，我不需要第一個孩子，我需要第二個孩子，我需要第二個孩子那個我需要的HTML值，但是當我嵌套循環時，它總是選擇第一個節點來解決這個問題

Answer 1

我看不到圖片，但您可以通過以下方式獲得：

parsed["key"];

Answer 2

下面的內容應該可以解決問題。

JArray data = (JArray)parsed["children"];

foreach(JObject children in (JObject)data){
  foreach(JObject child in (JArray)children["children"]){
     var value = child["html"];
  }

}

Answer 3

也許這個例子會有所幫助：

string json = @"{
  'channel': {
    'title': 'James Newton-King',
    'link': 'http://james.newtonking.com',
    'description': 'James Newton-King\'s blog.',
    'item': [
      {
        'title': 'Json.NET 1.3 + New license + Now on CodePlex',
        'description': 'Announcing the release of Json.NET 1.3, the MIT license and the source on CodePlex',
        'link': 'http://james.newtonking.com/projects/json-net.aspx',
        'categories': [
          'Json.NET',
          'CodePlex'
        ]
      },
      {
        'title': 'LINQ to JSON beta',
        'description': 'Announcing LINQ to JSON',
        'link': 'http://james.newtonking.com/projects/json-net.aspx',
        'categories': [
          'Json.NET',
          'LINQ'
        ]
      }
    ]
  }
}";

JObject rss = JObject.Parse(json);

string rssTitle = (string)rss["channel"]["title"];

string itemTitle = (string)rss["channel"]["item"][0]["title"];

JArray categories = (JArray)rss["channel"]["item"][0]["categories"];