Question

c#中如何改变json格式数据的某个值

我是想把dgv中第五列的值写进jo中，JObject jo =nul；在上面对jo进行了定义

Answer 1

我之前做过网络和桌面应用的数据对接，你看看
    /*
    1、对象集合
    */
    [DataContract]
    public class Items
    {
        [DataMember]
        public List<ddd> ddd{get;set;}
        public Items()
        {
            ddd = new List<ddd>();
        }
 
        //把字符串转换为对象
        public static Items FormJson(string json)
        {
            try
            {
                System.Runtime.Serialization.Json.DataContractJsonSerializer a = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(Items));
                using (MemoryStream stream = new MemoryStream(Encoding.Unicode.GetBytes(json)))
                {
                    return (Items)a.ReadObject(stream);
                }
            }
            catch (Exception)
            {
 
                return null;
            }
        }
    }
 /*
    简单的对象
 */
    [DataContract]
    public class ddd
    {
        [DataMember]
        public int cid{get;set;}
        [DataMember]
        public int pid { get; set; }
        [DataMember]
        public int oid { get; set; }
        [DataMember]
        public string view_type { get; set; }
        [DataMember]
        public string status { get; set; }
        [DataMember]
        public string name { get; set; }
        [DataMember]
        public string eng_name { get; set; }
        [DataMember]
        public string ctpl { get; set; }
        [DataMember]
        public string url { get; set; }
    }
 
 
    /*
    2、从HTTP请求中得到数据
    */
 
    HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://www.bursonchurch.net//index.php?Interface-index-keyt-123-act-catelist.html");
            request.Timeout = 5000;
            request.Method = "GET";
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Console.WriteLine("内容类型："+response.ContentType);
            Console.WriteLine("内容长度："+response.ContentLength);
            Console.WriteLine("服务器名："+response.Server);
            Console.WriteLine("资源的URI："+response.ResponseUri);
            Console.WriteLine("HTTP协议版本：" + response.ProtocolVersion);
            Console.WriteLine("相应状态："+response.StatusCode);
            Console.WriteLine("相应方法："+response.Method);
            //头信息
            for (int i = 0; i < response.Headers.Count; ++i)
            {
                Console.WriteLine("\nHeader Name:{0},----------Value:{1}", response.Headers.Keys[i], response.Headers[i]);
            }
 
            StreamReader sr = new StreamReader(response.GetResponseStream());
            string jsonstr = sr.ReadToEnd();
 
            //例子  ：假设得到的json数据 下面序列化为对象
            string test = "{\"ddd\":[{\"cid\":\"1\",\"pid\":\"0\",\"oid\":\"0\",\"view_type\":\"0\",\"status\":\"1\",\"name\":\"西科推荐\",\"eng_name\":\"\",\"ctpl\":\"\",\"ctitle\":\"\",\"ckeywords\":\"\",\"cdescription\":\"\",\"url\":\"http:\\/\\/www.bursonchurch.net\\/index.php?Cate-index-cid-1.html\"},{\"cid\":\"2\",\"pid\":\"0\",\"oid\":\"2\",\"view_type\":\"0\",\"status\":\"1\",\"name\":\"校园活动\",\"eng_name\":\"\",\"ctpl\":\"\",\"ctitle\":\"\",\"ckeywords\":\"\",\"cdescription\":\"\",\"url\":\"http:\\/\\/www.bursonchurch.net\\/index.php?Cate-index-cid-2.html\"},{\"cid\":\"3\",\"pid\":\"0\",\"oid\":\"2\",\"view_type\":\"0\",\"status\":\"1\",\"name\":\"帅哥\",\"eng_name\":\"\",\"ctpl\":\"\",\"ctitle\":\"\",\"ckeywords\":\"动物世界keword\",\"cdescription\":\"动物世界s\",\"url\":\"http:\\/\\/www.bursonchurch.net\\/index.php?Cate-index-cid-3.html\"},{\"cid\":\"4\",\"pid\":\"0\",\"oid\":\"4\",\"view_type\":\"1\",\"status\":\"1\",\"name\":\"静物\",\"eng_name\":\"\",\"ctpl\":\"\",\"ctitle\":\"\",\"ckeywords\":\"\",\"cdescription\":\"\",\"url\":\"http:\\/\\/www.bursonchurch.net\\/index.php?Cate-index-cid-4.html\"},{\"cid\":\"5\",\"pid\":\"0\",\"oid\":\"5\",\"view_type\":\"1\",\"status\":\"1\",\"name\":\"美女\",\"eng_name\":\"\",\"ctpl\":\"\",\"ctitle\":\"\",\"ckeywords\":\"\",\"cdescription\":\"\",\"url\":\"http:\\/\\/www.bursonchurch.net\\/index.php?Cate-index-cid-5.html\"}]}";
             
            //第一种转
            JavaScriptSerializer j = new JavaScriptSerializer();
            Items ii = new Items();
            ii = j.Deserialize<Items>(jsonstr);
 
 
            //第二种也行
            Items it = Items.FormJson(jsonstr);
 
            response.Close();
            Console.ReadKey();

Answer 2

如果你知道返回后的json是什么格式，就好取了啊。比如哦ss={name:"name",pass:"pass"}
只需要ss["name"]即可取到name的值了呗。