1、添加dll（C:Program FilesReference AssembliesMicrosoftFramework.NETFrameworkv4.0ProfileClientSystem.Data.DataSetExtensions.dll）

2、转化方法

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//将json格式字符转source化为object对象public static object JsonStrToObject(string source)
        {             
using (System.IO.MemoryStream ms = new System.IO.MemoryStream(System.Text.Encoding.UTF8.GetBytes(source)))
            {
                System.Runtime.Serialization.Json.DataContractJsonSerializer serializer= new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T));
return serializer.ReadObject(ms);
            }
        }

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此方法能够转换嵌套的json格式对象。

示例：

json格式字符串 “{"statuses":[{"created_at":"Fri May 17 16:09:25 +0800 2013","id":3578977384167458,"mid":"3578977384167458","idstr":"3578977384167458","text":"分享 徐佳莹 的歌曲《绿洲》 http://t.cn/zWWCVCF（分享自 @虾米音乐）","source":"虾米音乐","favorited":false,"truncated":false,"in_reply_to_status_id":"","in_reply_to_user_id":"","in_reply_to_screen_name":"","pic_urls":[{"thumbnail_pic":"/upload/otherpic40/5675d256jw1e4rczhqc6uj214h18f0yo.jpg","geo":null,"user":{"id":1450562134,"idstr":"1450562134","screen_name":"听雨花生","name":"听雨花生","province":"35","city":"1","location":"福建 福州","description":"人世多愁，自在几人能够。独倚高楼， 总有人高歌相候。","url":"","profile_image_url":"http://tp3.sinaimg.cn/1450562134/50/22819836445/1","profile_url":"u/1450562134","domain":"","weihao":"","gender":"m","followers_count":74,"friends_count":86,"statuses_count":470,"favourites_count":6,"created_at":"Wed Jul 21 15:09:43 +0800 2010","following":false,"allow_all_act_msg":false,"geo_enabled":true,"verified":false,"verified_type":-1,"remark":"","allow_all_comment":true,"avatar_large":"http://tp3.sinaimg.cn/1450562134/180/22819836445/1","verified_reason":"","follow_me":false,"online_status":1,"bi_followers_count":22,"lang":"zh-cn","star":0,"mbtype":0,"mbrank":0,"block_word":0},"reposts_count":1,"comments_count":0,"attitudes_count":0,"mlevel":0,"visible":{"type":0,"list_id":0}}],"hasvisible":false,"previous_cursor":0,"next_cursor":0,"total_number":1}”

转化成的对象：

public class PublicWeibo
    {
public List statuses { get; set; }          
public string previous_cursor { get; set; }        
public string next_cursor { get; set; }        
public string total_number { get; set; }        
    }
public class Statuses 
    {
public string created_at { get; set; }
public string id { get; set; }
public string text { get; set; }
public string source { get; set; }
public string favorited { get; set; }
public User user { get; set; }
    }
public class User 
    { 
public string id {get;set;}
public string screen_name {get;set;}
public string name {get;set;}
public string province {get;set;}
public string city {get;set;}
public string location {get;set;}
public string description {get;set;}
public string url {get;set;}
public string profile_image_url {get;set;}
public string domain {get;set;}
public string gender {get;set;}
public string followers_count{get;set;}
    }

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属性太多，并没有每个属性都表示下来，可以发现，在对象中没有列出的属性并不会影响已有属性。

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