System.Text.Json.JsonDocument与Newtonsoft.Json.Linq.JObject 简单笔记

一、JavaScriptSerializer（json动态转化成 Dictionary<string, object> 、ArrayList）
Dictionary<string, object> weater = new JavaScriptSerializer().Deserialize<Dictionary<string, object>>(jsonstr);
ArrayList arrayList = (ArrayList)weater1["forecast"];

二、Newtonsoft（json动态转化成JToken、 dynamic、JArray）
            JObject josn = JObject.Parse(josnstr);
            //JToken jToken = josn.SelectToken("$..forecast");
            //JArray array = new JArray(josn.SelectToken("$..forecast"));
            dynamic dm = josn.SelectToken("$..forecast");
            foreach (var item in dm)
            {
                Console.WriteLine(((JToken)item).SelectToken("$.high"));
            }
二、Newtonsoft转化成类
SenKeyMsg senKeyMsg = Newtonsoft.Json.JsonConvert.DeserializeObject<SenKeyMsg>(jsonstr);

插入代码片

jsonstr格式为腾讯云文字识别返回的json格式，如：
{
  "data":{
"items":[
  {
    "itemstring":"手机",
    "itemcoord":{"x":0,"y":100,"width":40,"height":20},
    "words":[
      {"character":"手","confidence":90.9},
      {"character":"机","confidence":93.9}
    ]
  }
],
    "session_id":"",
  },
  "code":0,
  "message":"OK"
}






           //system.text.json
            System.Text.Json.JsonDocument jd = System.Text.Json.JsonDocument.Parse(jsonstr);
            string code = jd.RootElement.GetProperty("code").ToString();
            if (code.Equals("0"))
            {
                string a = jd.RootElement.GetProperty("data").GetProperty("items").ToString();
                foreach (var item in jd.RootElement.GetProperty("data").GetProperty("items").EnumerateArray())
                {
                    Console.WriteLine(item.GetProperty("itemstring"));
                }
            }
            else
            {
                Console.WriteLine(jd.RootElement.GetProperty("message").ToString());
            }


分割


            #region
            //newtonsoft
            Newtonsoft.Json.Linq.JObject jobject = Newtonsoft.Json.Linq.JObject.Parse(jsonstr);
            string szError = jobject.SelectToken("code").ToString();
            if (szError.Equals("0"))
            {
                Newtonsoft.Json.Linq.JToken jtoken = jobject.SelectToken("$.." + "data").SelectToken("$.." + "items");
                int count = jtoken.Count();
                if (count == 0)
                {
                    return;
                }
                for (int i = 0; i < count; i++)
                {
                    string temp = "items(" + i + ").itemstring";
                    Console.WriteLine(jobject.SelectToken("$.." + "data").SelectToken("items(" + i + ").itemstring").ToString());
                }
            }
            else
            {
                Console.WriteLine(jobject.SelectToken("$.." + "message").ToString());
            }
            #endregion

            Console.ReadKey();
        

```csharp

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Web.Script.Serialization;

namespace MsTool
{
    public class GetWeather
    {
        public string Getweather(string city)
        {
            string outstr = string.Empty;
            string jsonstr = GetWeatherprivateM(city);
            if (!jsonstr.Contains("invilad-citykey"))
            {
                outstr = JsonParst(jsonstr);
            }
            else
            {
                outstr = "无效城市";
            }
            return outstr;
        }
        private string GetWeatherprivateM(string city)
        {
            string url = $"http://wthrcdn.etouch.cn/weather_mini?city={city}";
            HttpWebRequest hwr = (HttpWebRequest)HttpWebRequest.Create(url);
            hwr.Method = "get";
            hwr.ContentType = "application/x-www-form-urlencoded";
            hwr.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9";
            hwr.KeepAlive = true;
            hwr.UserAgent = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4292.2 Safari/537.36";
            hwr.Headers.Add("Accept-Encoding", "gzip, deflate");
            hwr.Headers.Add("Accept-Language", "zh-CN,zh;q=0.9,en;q=0.8,ru;q=0.7,de;q=0.6");
            HttpWebResponse hws = null;
            string outhtml = string.Empty;
            using (hws = (HttpWebResponse)hwr.GetResponse())
            {
                if (hws.ContentEncoding.ToLower().Equals("gzip"))
                {
                    outhtml = new StreamReader(new GZipStream(hws.GetResponseStream(), CompressionMode.Decompress)).ReadToEnd();
                }
                else if (hws.ContentEncoding.ToLower().Equals("deflate"))
                {
                    outhtml = new StreamReader(new DeflateStream(hws.GetResponseStream(), CompressionMode.Decompress)).ReadToEnd();
                }
                else
                {
                    outhtml = new StreamReader(hws.GetResponseStream()).ReadToEnd();
                }
            }
            return outhtml;
        }
        private string JsonParst(string jsonstr)
        {
            Dictionary weater = new JavaScriptSerializer().Deserialize>(jsonstr);
            Dictionary weater1 = (Dictionary)weater["data"];
            string city = (string)weater1["city"];
            ArrayList arrayList = (ArrayList)weater1["forecast"];
            //Dictionary weater2 = (Dictionary)arrayList[0];
            StringBuilder sb = new StringBuilder();
            sb.Append($"城市：{city}");
            string mouth = DateTime.Now.ToString("MM");
            for (int i = 0; i < arrayList.Count; i++)
            {
                Dictionary weater2 = (Dictionary)arrayList[i];
                string wdh = string.Empty;
                string wdl = string.Empty;
                foreach (KeyValuePair item in weater2)
                {
                    if (item.Key.Equals("date"))
                    {
                        sb.Append($"日期：{mouth}月{item.Value}");
                    }
                    if (item.Key.Equals("high"))
                    {
                        wdh = $"{item.Value}";
                    }
                    if (item.Key.Equals("low"))
                    {
                        wdl = $"温度：{item.Value}";
                    }
                    if (!string.IsNullOrEmpty(wdl) && !string.IsNullOrEmpty(wdh))
                    {
                        sb.Append(wdl + wdh);
                        wdh = string.Empty;
                        wdl = string.Empty;
                    }
                    if (item.Key.Equals("fengxiang"))
                    {
                        sb.Append($"风向：{item.Value}");
                    }
                    if (item.Key.Equals("type"))
                    {
                        sb.Append($"天气：{item.Value}");
                    }
                }
                //sb.Append("----------------");
            }
            return sb.ToString();
        }
    }
}