json - 使用 C# 中的 JSON.NET 反序列化 Twitter JSON 以获取主题标签

Question

也许我在重复这个问题，但我是第一次尝试这个，但我找不到与我的情况完全一样的东西..我正在用 C# 编码并使用 JSON.NET 反序列化一个 json。 json 文件来自 twitter，作为对此 GET 请求的响应:
https://api.twitter.com/1/statuses/home_timeline.json?include_entities=true
json 是来自给定用户的 twitter 时间线的 20 条最新推文(json 对象)的列表，单个 json 对象的格式如下:

{
"created_at": "Thu Sep 20 10:25:39 +0000 2012",
"id": 248729631476314100,
"id_str": "248729631476314112",
"text": "Ask the experts and learn what's new with v.2.2 at  at #MongoDBPune (http://t.co/o5BA7zd6) and #MongoDBBangalore (http://t.co/7q3E2MBq)",
"source": "<a href=\"http://www.socialrithmic.com\" rel=\"nofollow\">Socialrithmic</a>",
"truncated": false,
"in_reply_to_status_id": null,
"in_reply_to_status_id_str": null,
"in_reply_to_user_id": null,
"in_reply_to_user_id_str": null,
"in_reply_to_screen_name": null,
"user": {
  "id": 18080585,
  "id_str": "18080585",
  "name": "mongodb",
  "screen_name": "MongoDB",
  "location": "",
  "url": "http://mongodb.org/",
  "description": "High-performance, open source, schema-free document-oriented  database   | www.facebook.com/MongoDB",
  "protected": false,
  "followers_count": 24999,
  "friends_count": 16,
  "listed_count": 1582,
  "created_at": "Fri Dec 12 17:21:18 +0000 2008",
  "favourites_count": 6,
  "utc_offset": -18000,
  "time_zone": "Eastern Time (US & Canada)",
  "geo_enabled": true,
  "verified": false,
  "statuses_count": 1669,
  "lang": "en",
  "contributors_enabled": false,
  "is_translator": false,
  "profile_background_color": "529747",
  "profile_background_image_url": "http://a0.twimg.com/profile_background_images/619655093/767dji3m3k684nza7w9z.png",
  "profile_background_image_url_https": "https://si0.twimg.com/profile_background_images/619655093/767dji3m3k684nza7w9z.png",
  "profile_background_tile": false,
  "profile_image_url": "http://a0.twimg.com/profile_images/2452709870/wo2h8r0qy8d5lsxe5lgd_normal.png",
  "profile_image_url_https": "https://si0.twimg.com/profile_images/2452709870/wo2h8r0qy8d5lsxe5lgd_normal.png",
  "profile_link_color": "43B02A",
  "profile_sidebar_border_color": "829D5E",
  "profile_sidebar_fill_color": "99CC33",
  "profile_text_color": "3E4415",
  "profile_use_background_image": true,
  "default_profile": false,
  "default_profile_image": false,
  "following": true,
  "follow_request_sent": null,
  "notifications": null
},
"geo": null,
"coordinates": null,
"place": null,
"contributors": null,
"retweet_count": 1,
"entities": {
  "hashtags": [
    {
      "text": "MongoDBPune",
      "indices": [
        55,
        67
      ]
    },
    {
      "text": "MongoDBBangalore",
      "indices": [
        95,
        112
      ]
    }
  ],
  "urls": [
    {
      "url": "http://t.co/o5BA7zd6",
      "expanded_url": "http://soc.ai/ZV",
      "display_url": "soc.ai/ZV",
      "indices": [
        69,
        89
      ]
    },
    {
      "url": "http://t.co/7q3E2MBq",
      "expanded_url": "http://soc.ai/ZW",
      "display_url": "soc.ai/ZW",
      "indices": [
        114,
        134
      ]
    }
  ],
  "user_mentions": []
},
"favorited": false,
"retweeted": false,
"possibly_sensitive": false

}

我使用此代码获取(反序列化)列表:

List<JsonObject> list = Newtonsoft.Json.JsonConvert.DeserializeObject<List<JsonObject>>(response);

其中“响应”保存我的 json。当我插入断点并观察“列表”中的 json 对象时，我发现了这一点:

{
"created_at": "2012 年 9 月 20 日星期四 10:25:39 +0000",
“id”:248729631476314100，
"id_str": "248729631476314112",
"text": "在#MongoDBPune (http://t.co/o5BA7zd6) 和 #MongoDBBangalore (http://t.co/7q3E2MBq) 上询问专家并了解 v.2.2 的新功能",
"source": "Socialrithmic",
“截断”:假，
“in_reply_to_status_id”:空，
“in_reply_to_status_id_str”:空，
“in_reply_to_user_id”:空，
“in_reply_to_user_id_str”:空，
“in_reply_to_screen_name”:空，
“用户”:[
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
],
[
[]
]
],
“地理”:空，
“坐标”:空，
“地方”:空，
“贡献者”:空，
“转推计数”:1，
“实体”:[
[
[
[
[
[]
],
[
[
[],
[]
]
]
],
[
[
[]
],
[
[
[],
[]
]
]
]
]
],
[
[
[
[
[]
],
[
[]
],
[
[]
],
[
[
[],
[]
]
]
],
[
[
[]
],
[
[]
],
[
[]
],
[
[
[],
[]
]
]
]
]
],
[
[]
]
],
“最喜欢的”:假，
“转发”:假，
“可能_敏感”:假
}

我打算从所有 20 个 json 对象中收集所有主题标签..所以基本上我需要在实体内部导航到主题标签到文本。但如上所见，反序列化只是部分的。它不会反序列化任何嵌套的东西。
我该如何解决？请帮忙!

Answer 1

我的妈呀!从 this stackoverflow question 得到它.谢谢@chill182!
以下是您的操作方法:

 ArrayList hashtags = new ArrayList();

            JArray jsonDat = JArray.Parse(response); 
            for(int x = 0; x < jsonDat.Count(); x++) 
            {
                JObject entity = JObject.Parse(jsonDat[x]["entities"].ToString());
                JArray arrHashtags = JArray.Parse(entity["hashtags"].ToString());
                for(int i=0; i < arrHashtags.Count(); i++)
                {
                    JObject hashtagstuff = JObject.Parse(arrHashtags[i].ToString());
                    hashtags.Add(hashtagstuff["text"].ToString());
                }
            }

不要忘记在命名空间中包含 Linq :)

using Newtonsoft.Json.Linq;