.NET7 uses HttpClient to implement query weather forecast interface
A friend needs to display the weather forecast according to the city to make a website. After searching around, he couldn’t find a reliable interface. Today, he found an interface in a certain city on the official website of the Central Meteorological Observatory. First, he tried it with postman and it actually worked. You can check it 7-day weather forecast and other information for a certain city. But the query code is the code of the Meteorological Observatory itself. I searched the Internet and found this code. This article uses the HttpClient method to query this interface.
Weather interface
City Code
HttpClient is the most commonly used http request tool on the .net core platform. It is developed directly based on Socket and provides an asynchronous and friendly code writing method. It is under the System.Net.Http namespace.
1. Create a new environment
First create a .NET7 Asp.net core web Api program. The options are as follows.
Second, create a new GetWeather in the controller
Here we use the get method to request, query the weather forecast by passing in the city name, put the city name and code into the Dictionary, and use a single method to query. The code is as follows:
[HttpGet(Name = "GetWeather")]
public async Task GetWeather(string cityName)
{
//Coding query uses a single method
int citycode = publicfun. GetKeys(cityName);
using var client = new HttpClient();
//The base address of the request, usually the domain name
client.BaseAddress = new Uri("http://www.nmc.cn");
//In the request header, we specify the User-Agent
client.DefaultRequestHeaders.Add("User-Agent", "CJAVAPY BOT");
client.DefaultRequestHeaders.Accept.Add(
// Set the accept header to tell JSON is an acceptable response type
new MediaTypeWithQualityHeaderValue("application/json"));
//actual request address
var url = $"rest/weather?stationid={citycode}&_=1672315767048";
HttpResponseMessage response = await client.GetAsync(url);//get request
response.EnsureSuccessStatusCode();
var result= await response.Content.ReadAsStringAsync();//Get the result
return JsonResult(result) ;//return json
}
The coding dictionary method of each city in the country is as follows
public static class publicfun
{
public static int GetKeys(string key)
{
Dictionary dic = new Dictionary();
dic.Add("Macao", 45011);
dic.Add("Daxinganling", 50442);
dic.Add("Heihe", 50468);
dic.Add("Qiqihar", 50745);
dic.Add("Yichun", 50774);
dic.Add("Hegang", 50775);
dic.Add("Suihua", 50853);
dic.Add("Jiamusi", 50873);
dic.Add("Shuangyashan", 50884);
dic.Add("White City", 50936);
dic.Add("Harbin", 50953);
dic.Add("Qitaihe", 50973);
dic.Add("Jixi", 50978);
dic.Add("Altay", 51076);
dic.Add("Tower City", 51133);
dic.Add("Bozhou", 51238);
dic.Add("Karamay", 51243);
dic.Add("Shihezi", 51356);
dic.Add("Changji", 51368);
dic.Add("Yining", 51431);
dic.Add("Urumqi", 51463);
dic.Add("Turpan", 51573);
dic.Add("Aksu", 51628);
dic.Add("Bazhou", 51656);
dic.Add("Kezhou", 51704);
dic.Add("Kashgar", 51709);
dic.Add("Hetian", 51828);
dic.Add("Hami", 52203);
dic.Add("Jiuquan", 52533);
dic.Add("Zhangye", 52652);
dic.Add("Jinchang", 52675);
dic.Add("Wuwei", 52679);
dic.Add("Xining", 52866);
dic.Add("Pingan County", 52875);
dic.Add("Lanzhou", 52889);
dic.Add("Silver", 52896);
dic.Add("Tongren County", 52974);
dic.Add("Linxia", 52984);
dic.Add("Dingxi", 52995);
dic.Add("Baotou", 53446);
dic.Add("Hohhot", 53463);
dic.Add("Datong", 53487);
dic.Add("Wuhai", 53512);
dic.Add("Shizuishan", 53518);
dic.Add("Suozhou", 53578);
dic.Add("Wu Zhong", 53612);Yong", 57558);
dic.Add("Yueyang", 57584);
dic.Add("Xianning", 57590);
dic.Add("Changde", 57662);
dic.Add("Yiyang", 57674);
dic.Add("Changsha", 57687);
dic.Add("Bijie", 57707);
dic.Add("Zunyi", 57713);
dic.Add("Tongren", 57741);
dic.Add("Huaihua", 57749);
dic.Add("Loudi", 57763);
dic.Add("Shaoyang", 57766);
dic.Add("Xiangtan", 57773);
dic.Add("Zhuzhou", 57780);
dic.Add("Pingxiang", 57786);
dic.Add("Yichun", 57793);
dic.Add("Xinyu", 57796);
dic.Add("Anshun", 57806);
dic.Add("Guiyang", 57816);
dic.Add("Kerry", 57825);
dic.Add("Duyun", 57827);
dic.Add("Hengyang", 57872);
dic.Add("Guilin", 57957);
dic.Add("Chenzhou", 57972);
dic.Add("Ganzhou", 57993);
dic.Add("Shangqiu", 58005);
dic.Add("Zaozhuang", 58024);
dic.Add("Xuzhou", 58027);
dic.Add("Lianyungang", 58044);
dic.Add("Bozhou", 58102);
dic.Add("Huaibei", 58116);
dic.Add("Suzhou", 58122);
dic.Add("Suqian", 58131);
dic.Add("Huai'an", 58145);
dic.Add("Yancheng", 58151);
dic.Add("Fuyang", 58203);
dic.Add("Bengbu", 58221);
dic.Add("Huainan", 58224);
dic.Add("Chuzhou", 58236);
dic.Add("Nanjing", 58238);
dic.Add("Yangzhou", 58245);
dic.Add("Taizhou", 58246);
dic.Add("Zhenjiang", 58248);
dic.Add("Nantong", 58259);
dic.Add("Six'an", 58311);
dic.Add("Hefei", 58321);
dic.Add("Chaohu", 58326);
dic.Add("Wuhu", 58334);
dic.Add("Ma'anshan", 58336);
dic.Add("Changzhou", 58343);
dic.Add("Wuxi", 58354);
dic.Add("Suzhou", 58357);
dic.Add("Shanghai", 58362);
dic.Add("Yellowstone", 58407);
dic.Add("Anqing", 58424);
dic.Add("Chizhou", 58427);
dic.Add("Tongling", 58429);
dic.Add("Xuancheng", 58433);
dic.Add("Huzhou", 58450);
dic.Add("Jiaxing", 58452);
dic.Add("Shaoxing", 58453);
dic.Add("Hangzhou", 58457);
dic.Add("Zhoushan", 58477);
dic.Add("Jiujiang", 58502);
dic.Add("Jingdezhen", 58527);
dic.Add("Jinhua", 58549);
dic.Add("Nanchang", 58606);
dic.Add("Fuzhou", 58617);
dic.Add("Yingtan", 58627);
dic.Add("Quzhou", 58633);
dic.Add("Lishui", 58646);
dic.Add("Wenzhou", 58659);
dic.Add("Taizhou", 58660);
dic.Add("Sanming", 58828);
dic.Add("Nanping", 58834);
dic.Add("Ningde", 58846);
dic.Add("Fuzhou", 58847);
dic.Add("Longyan", 58927);
dic.Add("Putian", 58946);
dic.Add("Hechi area", 59023);
dic.Add("Liuzhou", 59046);
dic.Add("Hezhou area", 59065);
dic.Add("Shaoguan", 59082);
dic.Add("Zhangzhou", 59126);
dic.Add("Quanzhou", 59131);
dic.Add("Xiamen", 59134);
dic.Add("Baise", 59211);
dic.Add("Guest", 59242);
dic.Add("Guigang", 59249);
dic.Add("Wuzhou", 59265);
dic.Add("Zhaoqing", 59278);
dic.Add("Qingyuan", 59280);
dic.Add("Guangzhou", 59287);
dic.Add("Foshan", 59288);
dic.Add("Dongguan", 59289);
dic.Add("Heyuan", 59293);
dic.Add("Chaozhou", 59312);
dic.Add("Jieyang", 59315);
dic.Add("Shantou", 59316);
dic.Add("Chongzuo", 59425);
dic.Add("Yulin", 59453);
dic.Add("Yunfu", 59471);
dic.Add("Zhongshan", 59485);
dic.Add("Zhuhai", 59488);
dic.Add("Shenzhen", 59493);
dic.Add("Shanwei", 59501);
dic.Add("Kaohsiung", 59554);
dic.Add("Qinzhou", 59632);
dic.Add("Fangchenggang", 59635);
dic.Add("Beihai", 59644);
dic.Add("Zhanjiang", 59658);
dic.Add("Maoming", 59659);
dic.Add("Yangjiang", 59663);
dic.Add("Haikou", 59758);
dic.Add("Sanya", 59948);
dic.Add("Xisha", 59981);
var rel = dic[key];
return rel;
}
}
The query results are as follows:
All the data is available, and you can create an object according to the actual needs to obtain the required data, which is not implemented here.
3. Conclusion
This article describes the use of .NET7 to query the weather forecast through the get method of HttpClient. The time relationship does not realize all functions, and it is for reference only. If there is no requirement for the style, there is a js interface on the Internet, and it can be pasted directly on the web page. Do you have any good weather forecast API? Welcome to leave a message to discuss.
Source public account: DotNet development job-hopping❀
The get method of nt queries the weather forecast, and the time relationship does not realize all functions, it is for reference only. If there is no requirement for the style, there is a js interface on the Internet, and it can be pasted directly on the web page. Do you have any good weather forecast API? Welcome to leave a message to discuss.
Source public account: DotNet development job-hopping❀
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