使用 JSON.NET 或 JavaScriptSerializer 在 C# 中反序列化 JSON 对象

Question

很抱歉，如果之前有人问过这个问题，但我尝试在这里寻找一些答案，但找不到。

无论如何，我对这个问题也有类似的问题： 使用 Json.net 解析 JSON

它解决了一些问题，但对我的 JSON 数据感到困惑。这是 json 数据

{
   "messages":[
      {
         "message":"hilo",
         "timestamp":"23:55",
         "uid1":"7",
         "name":"shiftypowers"
      }
   ],
   "total_messages":"1",
   "last_timestamp":"1304265309",
   "buddylist":{
      "476":{
         "name":"Gandang_hari",
         "status":"1"
      },
      "506":{
         "name":"ichigo",
         "status":"1"
      },
      "186":{
         "name":"Jinn",
         "status":"1"
      },
      "7":{
         "name":"shiftypowers",
         "status":"1"
      },
      "total":4
   }
}

If you noticed the numbers 476, 506, 186, and 7 - those were user id, and am going to deal with thousands of user id in the future.

The question is, how do I deserialize this?

如果上面的代码正确的话，这是我的代码

public class ElakoChatPollData
    {
        public ElakoChatPollData()
        {
            messages = new List();
        }
        public List messages { get; set; }
        public string total_messages { get; set; }
        public string last_timestamp { get; set; }
        public buddylist buddylist { get; set; }
    }

    public class messages
    {
        public string message { get; set; }
        public string timestamp { get; set; }
        public string uid1 { get; set; }
        public string name { get; set; }
    }

    public class buddylist
    {
        // what should I put here ??
        //public List uid { get; set; } // i don't think this is correct
        public Dictionary Users { get; private set; }
        public string total { get; set; }
    }

    public class userinfo
    {
        public string name { get; set; }
        public string status { get; set; }
    }

// and serializing the json looks like this
JavaScriptSerializer ser = new JavaScriptSerializer();
ChatPollData epd = ser.Deserialize<ChatPollData>(jsonchatpoll);
Console.Writeline(epd.buddylist.Users[0].name); // i get Object reference not set ~~~~

..我怎样才能获得用户ID？顺便说一句，json 数据将从 drupal 模块 (drupalchat) 请求

Answer 1

一种简单的解决方案是使用 newtonsoft json 库中包含的 linq-to-json 类。然后，您需要手动实例化您的对象，但考虑到您的文件格式非常简单，这应该不需要太多工作。

手动执行此操作的好处是数据格式和内存格式可能完全不同。

 // public List<userinfo> uid { get; set; }; // i don't think this is correct
 public Dictionary<int,UserInfo> Users{get;private set;}//I might use something like this

Answer 2

我认为您可以使用 Newtonsoft.Json 库进行序列化或反序列化过程。

Id 值必须在 BuddyList 对象中（这是我的意见）

如果您的响应如下：

{
    "messages": [{
        "message": "hilo",
        "timestamp": "23:55",
        "uid1": "7",
        "name": "shiftypowers"
    }],
    "total_messages": "1",
    "last_timestamp": "1304265309",
    "buddylist": [{
            "id": 476,
            "name": "Gandang_hari",
            "status": "1"
        }, {
            "id": 506,
            "name": "ichigo",
            "status": "1"
        }, {
            "id": 186,
            "name": "Jinn",
            "status": "1"
        },
        {
            "id": 7,
            "name": "shiftypowers",
            "status": "1"
        }
    ]
}

您可以为反序列化创建响应对象：

public class Message
{
    public string message { get; set; }
    public string timestamp { get; set; }
    public string uid1 { get; set; }
    public string name { get; set; }
}

public class Buddylist
{
    public int id { get; set; }
    public string name { get; set; }
    public string status { get; set; }
}

public class ElakoChatPollData
{
    public List<Message> messages { get; set; }
    public string total_messages { get; set; }
    public string last_timestamp { get; set; }
    public List<Buddylist> buddylist { get; set; }
}

当您想要序列化此对象时：

string _serialized = JsonConvert.SerializeObject(_yourObject);

对于反序列化：

var _data = JsonConvert.DeserializeObject<ElakoChatPollData>(_serialized);