C# JObject解析JSON数据

1.引用DLL文件

在项目中引用Newtonsoft.Json.dll

2.解析简单json数据

//生成json类型数据
JObject obj = new JObject();
obj.Add("key1", "value1");
obj.Add("key2", "value2");
obj.Add("key3", 3);
String response = obj.ToString();
Console.WriteLine(response);
Console.WriteLine("=================================");

 //解析数值
JObject joResponse = (JObject)JsonConvert.DeserializeObject(response);
Console.WriteLine(joResponse["key1"].ToString());
Console.WriteLine(joResponse["key2"].ToString());
Console.WriteLine(joResponse["key3"].ToString());

3.解析json数组

//生成数组
JArray jarray = new JArray();
JObject jobj = new JObject();
jobj.Add("name", "张三");
jobj.Add("age", 18);
jobj.Add("sex", "男");

JObject jobj2 = new JObject();
jobj2.Add("name", "李四");
jobj2.Add("age", 18);
jobj2.Add("sex", "女");

jarray.Add(jobj);
jarray.Add(jobj2);
String response = jarray.ToString();
Console.WriteLine(response);
Console.WriteLine("============================================");

 //解析数组
JArray ja = (JArray)JsonConvert.DeserializeObject(response);
//获取数值
foreach (JObject jo in ja)
{
       string name = jo["name"].ToString();
       string age = jo["age"].ToString();
       string sex = jo["sex"].ToString();
       Console.WriteLine("name="+name + ", age=" + age+", sex=" + sex);
}

//单个数值获取
JObject joo = (JObject)ja[1];
string name2 = joo["name"].ToString();
Console.WriteLine("name2="+name2);
string age2 = joo["age"].ToString();
Console.WriteLine("age2=" + age2);
string sex2 = joo["sex"].ToString();
Console.WriteLine("sex2=" + sex2);

4.将对象转换成json

public static class ObjectToJsonHelper
    {
        /// <summary>
        /// 将对象序列化为JSON格式
        /// </summary>
        /// <param name="o">对象</param>
        /// <returns>json字符串</returns>
        public static string SerializeObject(object o)
        {
            string json = JsonConvert.SerializeObject(o);
            return json;
        }

        /// <summary>
        /// 解析JSON字符串生成对象实体
        /// </summary>
        /// <typeparam name="T">对象类型</typeparam>
        /// <param name="json">json字符串(eg.{"ID":"123","Name":"张三})</param>
        /// <returns>对象实体</returns>
        public static T DeserializeJsonToObject<T>(string json) where T : class
        {
            try
            {
                JsonSerializer serializer = new JsonSerializer();
                StringReader sr = new StringReader(json);
                object o = serializer.Deserialize(new JsonTextReader(sr), typeof(T));
                T t = o as T;
                return t;
            }
            catch (Exception ex)
            {
                return null;
            }
        }

        /// <summary>
        /// 解析JSON数组生成对象实体集合
        /// </summary>
        /// <typeparam name="T">对象类型</typeparam>
        /// <param name="json">json数组字符串(eg.[{"ID":"123","Name":"张三"}])</param>
        /// <returns>对象实体集合</returns>
        public static List<T> DeserializeJsonToList<T>(string json) where T : class
        {
            JsonSerializer serializer = new JsonSerializer();
            StringReader sr = new StringReader(json);
            object o = serializer.Deserialize(new JsonTextReader(sr), typeof(List<T>));
            List<T> list = o as List<T>;
            return list;
        }
    }