1、创建-用匿名对象创建 JObject

JObject ob = JObject.FromObject(new
{
RPT_ID = "getList",
pageSize = 100,
auth = "myAuthCode",
PARAS = new { IDCard = cardNo }
});

2、合并其他对象到属性
JObject obj = new JObject();
obj.Add("name", "张三");
obj.Add("birthday", DateTime.Now); 
//合并其他对象到当前对象的属性
obj.Add("content", JToken.FromObject(new
{
    code = "zhangsan"
}));

3、合并其他对象的属性，到当前对象
//合并其他
JToken token = JToken.FromObject(new
{
    code = "zhangsan"
});
JObject obj2 = JObject.FromObject(new
{
    code = "lisi"
});
obj.Merge(obj2);

4、错误的写法 直接Add对象，会抛出异常：Could not determine JSON object 
//直接添加对象失败：Could not determine JSON object 
//obj.Add(new {
//    code="zhangsan"
//});

5、简单json对象
{
"shp_flg": "0",
"fm_date": "2018-04-18T00:00:00Z",
"to_date": "2018-04-18T00:00:00Z",
"emp_no": "008",
"emp_nme_en": "Visitor 6",
"shift": "事假",
"work_time": 35,
"remark": "xyz"
}
JObject jo = JObject.Parse(paramsStr);    //paramsStr - json字符串名字
//下面是各种不同写法,但是结果一样
string shp_flg = jo["shp_flg"].ToString();
string fm_date = jo["fm_date"].ToString("yyyy-MM-dd");
string to_date = jo.Value<DateTime>("to_date").ToString("yyyy-MM-dd");
string emp_no = jo["emp_no"].ToString();
string shift = jo.Value<string>("shift");
int work_time = jo.Value<int>("work_time");
string remark = jo.Value<string>("remark");

6、嵌套json对象解析
json 格式的字符串解析 格式化
{
   "input": {
       "size": 193156,
       "type": "image/png"
   },
   "output": {
       "size": 59646,
       "type": "image/png",
       "width": 487,
       "height": 284,
       "ratio": 0.3088,
       "url": "https://api.tinify.com/output/hrqtghqtv0ab4qgv.png"
    }
}

// json解析  嵌套格式
Newtonsoft.Json.Linq.JObject jobject = (Newtonsoft.Json.Linq.JObject)Newtonsoft.Json.JsonConvert.DeserializeObject(jsonText);

decimal input_size = Convert.ToDecimal(jobject["input"]["size"]);//193156, 输入图片大小
string input_type = jobject["input"]["type"].ToString();// "image/png"，输入图片类型
decimal output_size = Convert.ToDecimal(jobject["output"]["size"]);// 59646, 图片大小
string output_type = jobject["output"]["type"].ToString();//"image/png", 图片类型
string output_width = jobject["output"]["width"].ToString();//487, 宽度
string output_height = jobject["output"]["height"].ToString();//284, 高度
string output_ratio = jobject["output"]["ratio"].ToString();//0.3088, 压缩率=Convert.ToString((1-0.3088)*100)+"%";
string output_url = jobject["output"]["url"].ToString();//"https://api.tinify.com/output/hrqtghqtv0ab4qgv.png"


WebEnh.Core.Net.HttpProc.WebClient wc = new WebEnh.Core.Net.HttpProc.WebClient();
wc.DownloadFile(output_url, download_filename);