C#Newtonsoft.Json SelectToken未从API获取值

Question

我正在尝试编程一个控制台应用程序，该应用程序将从不同的天气API中挖掘数据，并将其写入屏幕，然后将其保存到磁盘。我可以显示"黑暗天空"中的值，但无法从"开放天气"中获取值。

下面是代码，从类开始

using System;
using System.Collections.Generic;
using System.Text;
namespace WeatherAPIs.Models
{
class API_URL
{
//This Class takes all the relevant values such as latitude, longitude, Barrie city code, API keys, to crate 
public static string DarkSkyBaseURL = "https://api.darksky.net/forecast/{Key}/44.4074,-79.6567?units=si";
public static string OpenWeatherBaseURL = "https://api.openweathermap.org/data/2.5/forecast?id=5894171&units=metric&APPID={Key}";
public static string WeatherBitBaseURL = "https://api.weatherbit.io/v2.0/current?&lat=44.4074&lon=-79.6567&key={Key}";
}
}

这是主要代码：

using System;
using WeatherAPIs.Models;
using System.Net.Http;
using System.Net;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace WeatherAPIs
{
class API_Data_Mine
{
static void Main(string[] args)
{
//Defines The client as WebClient and setup the HTTP Header
using var client = new WebClient();
client.Headers.Add("User-Agent", "C# Weather API");
client.Headers.Add("Accept", "application/json");
client.Headers.Add("Content-Type", "application/json");
//Download the JSON result from the DarkSkyBaseURL on API_URL Class
string darkskyresult = client.DownloadString(API_URL.DarkSkyBaseURL);
var darkskyjson = JsonConvert.DeserializeObject(darkskyresult);
//Print int the screen the result of the raw and unbeauty JSON download, wait for the user to press a key to resume
Console.WriteLine(darkskyresult);
Console.WriteLine("npress any key to resume.");
Console.ReadKey();
string openWResult = client.DownloadString(API_URL.OpenWeatherBaseURL);
var openWJson = JsonConvert.DeserializeObject(openWResult);
//Print int the screen the result of the raw and unbeauty JSON download, wait for the user to press a key to resume
Console.WriteLine(openWResult);
Console.WriteLine("npress any key to resume.");
Console.ReadKey();
//Parse and beautify the JSON Output from DarkSky URL
JObject JDarkSKy = JObject.Parse(darkskyresult);
JObject JopenW = JObject.Parse(openWResult);
////Write the beautified JSON from DarkSKy on screen and wait for the user to press a key to exit
Console.WriteLine(JDarkSKy);
Console.WriteLine("nPress any key to resume.");
Console.ReadKey();
Console.WriteLine(JopenW);
Console.WriteLine("nPress any key to resume.");
Console.ReadKey();
///Mine the JSON selected JSON data and print it on screen
var DSTemperature = (string)JDarkSKy.SelectToken("currently.temperature");
var DSPressure = (string)JDarkSKy.SelectToken("currently.pressure");
var DSWindSpeed = (string)JDarkSKy.SelectToken("currently.windSpeed");
var DSRealFeel = (string)JDarkSKy.SelectToken("currently.apparentTemperature");
var DSUvIndex = (string)JDarkSKy.SelectToken("currently.uvIndex");
var OWTemperature = (string)JopenW.SelectToken("list.main.temp");
var OWPressure = (string)JopenW.SelectToken("list.main.pressure");
var OWWindSpeed = (string)JopenW.SelectToken("list.wind.speed");
var OWRealFeel = (string)JopenW.SelectToken("list.main.feels_like");
//UV only works wqith paid keys
//var OWUvIndex = (string)JDarkSKy.SelectToken("list.main.");
Console.WriteLine("Temperature on Dark Sky is - " + DSTemperature);
Console.WriteLine("Pressure on Dark Sky is - " + DSPressure);
Console.WriteLine("Wind Spped on Dark Sky is - " + DSWindSpeed);
Console.WriteLine("Real Feel on Dark Sky is - " + DSRealFeel);
Console.WriteLine("Ultra Violet Index on Dark Sky is - " + DSUvIndex);
Console.WriteLine("Temperature on Open Weather is - " + OWTemperature);
Console.WriteLine("Pressure on Open Weather is - " + OWPressure);
Console.WriteLine("Wind Spped on Open Weather is - " + OWWindSpeed);
Console.WriteLine("Real Feel on Open Weather is - " + OWRealFeel);
//Console.WriteLine("nPress any key to resume.");            
Console.ReadKey();
}
}
}

我需要做什么才能从Open Weather获得数据？

Answer 1

openweathermap返回list作为数组而不是对象。因此，您应该相应地更新您的选择令牌。

尝试使用[0]获取第一个对象的数据。

var OWTemperature = (string)JopenW.SelectToken("list[0].main.temp");
var OWPressure = (string)JopenW.SelectToken("list[0].main.pressure");
var OWWindSpeed = (string)JopenW.SelectToken("list[0].wind.speed");
var OWRealFeel = (string)JopenW.SelectToken("list[0].main.feels_like");