使用NET Framework 3.5解析JSON。无法从对象获取数据

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我只是无法获取json中嵌入对象的键和值。 我想获取这些键和值，例如 {user：‘admin’，msg：‘exit’} 。 通过此代码，我获得了item.Key（即json中的ID）和item.Value（System.Collections.Generic.Dictionary`2 [System.String，System.Object]）但是我只是不知道该对象做什么。如何从中获取数据？ 我从服务器获取json-

I just can't get key and value for embedded object in json. I want to get these keys and values like { user: 'admin', msg: 'exit' }. With this code I get item.Key (that is id in that json) and item.Value (System.Collections.Generic.Dictionary`2[System.String,System.Object]) But I just don't know what to do with this object. How to get data from it? I get json from server -

{ "365": { "user": "admin", "msg": "exit" }, "366": { "user": "user", "msg": "enter" }, "370": { "user": "user", "msg": "exit" }, "372": { "user": "user", "msg": "exit" }, "373": { "user": "admin", "msg": "exit" } }

谢谢您的回答。

PS 我不想使用任何外部库。

P.S. I don't want to use any external libs.

using System; using System.Collections; using System.Collections.Generic; using System.Net; using System.Web.Script.Serialization; namespace JSONTestconsole { class Program { static void Main(string[] args) { WebClient wc = new WebClient(); wc.Proxy = null; string data = wc.DownloadString("temp"); JavaScriptSerializer ser = new JavaScriptSerializer(); var obj = ser.DeserializeObject(data) as ICollection; foreach (KeyValuePair<string, object> item in obj) { var id = item.Key; Console.WriteLine(id); Console.WriteLine(item.Value); } Console.ReadLine(); } } }

推荐答案

您正在反序列化到 Object ，该对象不会公开值属性。 json表示已序列化的对象，因此最好将其反序列化为相同的类型：

You are deserializing to Object which wont expose the value properties. json represents a serializied object, so it is better to deserialize to the same Type:

public class UserMsg { public string user { get; set; } public string msg { get; set; } }

将其用作值目标类型：

string jstr = ...from whereever JavaScriptSerializer jss = new JavaScriptSerializer(); Dictionary<string, UserMsg> myCol = jss.Deserialize<Dictionary<string, UserMsg>>(jstr); // test result: foreach (KeyValuePair<string, UserMsg> kvp in myCol) { Console.WriteLine("Key: {0}", kvp.Key); Console.WriteLine(" Value: {0}, {1}", kvp.Value.user, kvp.Value.msg); }

输出：

键：365 值：admin，退出 键：366 值：用户，输入 （etc）

Key: 365 Value: admin, exit Key: 366 Value: user, enter (etc)

VS将有助于创建此类：将有效的json放在剪贴板上；然后 编辑菜单->选择性粘贴->将Json粘贴为类。

VS will help make the class: put the valid json on the clipboard; then Edit Menu -> Paste Special -> Paste Json as Class.

您可能需要调整一些内容。我认为是在VS2010中添加了此功能。

You may have to tweak a few things. I think it was VS2010 where this feature was added.