[C#]使用控制台获取天气预报

2018-01-25 19:13:53来源:cnblogs.com作者:cnc人点击

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本例子主要是使用由中央气象局网站(http://www.nmc.gov.cn)提供的JSON API,其实现思路如下:

1、访问获取省份(包含直辖市、自治区等,以下简称省份)的网址(http://www.nmc.gov.cn/f/rest/province),返回对应的省份名称(name)、代码(code)等,如下图所示:

2、根据以上返回的代码(code),将代码拼接在网址(http://www.nmc.gov.cn/f/rest/province)的后面,如返回的代码为 AGD (广东省),则拼接后的网址为http://www.nmc.gov.cn/f/rest/province/AGD,以此获得对应的城市名称(city)、代码(code),如下图所示:

 

3、根据以上返回的代码,将代码拼接在网址(http://www.nmc.gov.cn/f/rest/real/)的后面,如返回的代码为 59287 (广州),则拼接后的网址为http://www.nmc.gov.cn/f/rest/real/59287,以此获得对应的天气信息,如下图所示:

 

4、本例子使用的技术为 HttpWebRequest类、HttpWebResponse类及Newtonsoft.Json.JsonConvert类的使用,自己有不懂的,请自行进行百度;

5、源代码如下:

using Newtonsoft.Json;using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Net;namespace Weather{    class Program    {        static void Main(string[] args)        {            HttpWebRequest request = WebRequest.CreateHttp(@"http://www.nmc.gov.cn/f/rest/province");            try            {                HttpWebResponse response = request.GetResponse() as HttpWebResponse;                Stream stream = response.GetResponseStream();                StreamReader reader = new StreamReader(stream);                string content = reader.ReadToEnd();                List<Province> provinceResult = JsonConvert.DeserializeObject<List<Province>>(content);                Dictionary<string, string> proviceNamedict = new Dictionary<string, string>();                Console.WriteLine("省及直辖市:");                provinceResult.ForEach(x =>                {                    proviceNamedict.Add(x.name, x.code);                    Console.WriteLine(x.name);                });                string provice;                while (true)                {                    Console.Write("请输入需要查询的省或直辖市:");                    provice = Console.ReadLine();                    if (proviceNamedict.Keys.Contains(provice)) break;                }                Console.Clear();                request = WebRequest.CreateHttp($"http://www.nmc.gov.cn/f/rest/province/{proviceNamedict[provice]}");                response = request.GetResponse() as HttpWebResponse;                stream = response.GetResponseStream();                reader = new StreamReader(stream);                content = reader.ReadToEnd();                List<City> cityResult = JsonConvert.DeserializeObject<List<City>>(content);                Dictionary<string, string> cityNamedict = new Dictionary<string, string>();                Console.WriteLine("城市:");                cityResult.ForEach(x =>                {                    cityNamedict.Add(x.city, x.code);                    Console.WriteLine(x.city);                });                string city;                while (true)                {                    Console.Write("请输入需要查询的城市:");                    city = Console.ReadLine();                    if (cityNamedict.Keys.Contains(city)) break;                }                request = WebRequest.CreateHttp($"http://www.nmc.gov.cn/f/rest/real/{cityNamedict[city]}");                response = request.GetResponse() as HttpWebResponse;                stream = response.GetResponseStream();                reader = new StreamReader(stream);                content = reader.ReadToEnd();                Detail detailResult = JsonConvert.DeserializeObject<Detail>(content);                Console.WriteLine(new string('-', 50));                Console.WriteLine("详细情况如下:");                Console.WriteLine($"{detailResult.station.province},{detailResult.station.city} 发布时间:{detailResult.publish_time}");                Console.WriteLine($"温度:{detailResult.weather.temperature}℃ 温差:{detailResult.weather.temperatureDiff}℃ 气压:{detailResult.weather.airpressure}hPa 湿度:{detailResult.weather.humidity}% 雨量:{detailResult.weather.rain}mm");                Console.WriteLine($"天气状况:{detailResult.weather.info}");                Console.WriteLine($"风向:{detailResult.wind.direct} {detailResult.wind.power} 风速:{detailResult.wind.speed}m/s");                Console.WriteLine(new string('-', 50));            }            catch(WebException ex)            {                Console.WriteLine(ex.Message);            }            Console.WriteLine("按任何键退出...");            Console.ReadKey();        }    }    class Province    {        public string code { set; get; }        public string name { set; get; }        public string url { set; get; }    }    class City    {        public string url { set; get; }        public string code { set; get; }        public string city { set; get; }        public string province { set; get; }    }    class Detail    {        public City station { set; get; }        public string publish_time { set; get; }        public Weather weather { set; get; }        public Wind wind { set; get; }        public Warn warn { set; get; }    }    class Weather    {        public float temperature { set; get; }        public float temperatureDiff { set; get; }        public float airpressure { set; get; }        public float humidity { set; get; }        public float rain { set; get; }        public float rcomfort { set; get; }        public float icomfort { set; get; }        public string info { set; get; }        public string img { set; get; }        public float feelst { set; get; }    }    class Wind    {        public string direct { set; get; }        public string power { set; get; }        public float speed { set; get; }    }    class Warn    {        public string alert { set; get; }        public string pic { set; get; }        public string province { set; get; }        public string city { set; get; }        public string url { set; get; }        public string issuecontent { set; get; }        public string fmeans { set; get; }    }}

6、运行效果如下:

7、源代码与可执行应用程序如下:

源代码:https://pan.baidu.com/s/1pM98VnP
可执行应用程序:https://pan.baidu.com/s/1i6mK8xn

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