Weather Updates In Console Application Using API

Sridhar Sharma
Dec 19, 2017
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Article

I am writing this article to give you a basic idea of consuming a Web API from Yahoo Weather and display it in the Console.

Let us create a project with Console App template.

Web API

Add a class and name it as WeatherReport.

Web API

Add the following properties in WeatherReport class.

public class WeatherReport {
public string date {
get;
set;
}
public long temp {
get;
set;
}
public string text {
get;
set;
}
}

Get woeid (Where on earth ID) of your city using this link (Just remove Hyderabad and keep your city name). For Hyderabad, the woeid is 2295414 which I read from the response of the below API call.

https://www.metaweather.com/api/location/search/?query=hyderabad.

The response of the above link will look like this -

[{
"title": "Hyderabad",
"location_type": "City",
"woeid": 2295414,
"latt_long": "17.508829,78.434578"
}]

Now, let us use a wonderful Free API for weather updates and put it in our code. I used Yahoo API (since it is Free for developers) and passed the woeid 2295414 in the query.

static void Main(string[] args)
{
HttpClient client = new HttpClient();
client.BaseAddress = new Uri("https://query.yahooapis.com/v1/public/yql?q=select%20item%20from%20weather.forecast%20where%20woeid%20in%20(2295414%20)&format=json");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
GetWeather(client).Wait();
}
static async Task GetWeather(HttpClient cons)
{
using (cons)
{
HttpResponseMessage res = await cons.GetAsync("");
res.EnsureSuccessStatusCode();
if (res.IsSuccessStatusCode)
{
string weather = await res.Content.ReadAsStringAsync();
JObject jobj= JObject.Parse(weather);
JToken jToken = jobj.First;
string WeatherState = jToken.First["results"]["channel"]["item"]["condition"].ToString();
WeatherReport report = Newtonsoft.Json.JsonConvert.DeserializeObject<WeatherReport>(WeatherState);
Console.WriteLine("\n");
Console.WriteLine("Weather Station: Hyderabad" );
Console.WriteLine("Temperature Details");
Console.WriteLine("-----------------------------------------------------------");
Console.WriteLine("Temperature (in deg. C): "+ (report.temp-32)*0.55);// Converted from Fahrenheit to Celsius
Console.WriteLine("Weather State: " + report.text);
Console.WriteLine("Applicable Time: " + report.date);
Console.ReadLine();
}
}
}

When we run the above code, the output will be something like this.

Weather Station: Hyderabad
Temperature Details
-----------------------------------------------------------
Temperature (in deg. C): 16.5
Weather State: Mostly Cloudy
Applicable Time: Tue, 19 Dec 2017 03:30 AM IST

Web API

We can get more details from JSON and display it on our Console. Here is how the JSON will look like.

{
"query": {
"count": 1,
"created": "2017-12-18T23:34:41Z",
"lang": "en-US",
"results": {
"channel": {
"units": {
"distance": "mi",
"pressure": "in",
"speed": "mph",
"temperature": "F"
},
"title": "Yahoo! Weather - Hyderabad, Telangana, IN",
"link": "http://us.rd.yahoo.com/dailynews/rss/weather/Country__Country/*https://weather.yahoo.com/country/state/city-2295414/",
"description": "Yahoo! Weather for Hyderabad, Telangana, IN",
"language": "en-us",
"lastBuildDate": "Tue, 19 Dec 2017 05:04 AM IST",
"ttl": "60",
"location": {
"city": "Hyderabad",
"country": "India",
"region": " Telangana"
},
"wind": {
"chill": "61",
"direction": "23",
"speed": "7"
},
"atmosphere": {
"humidity": "59",
"pressure": "954.0",
"rising": "0",
"visibility": "16.1"
},
"astronomy": {
"sunrise": "6:41 am",
"sunset": "5:46 pm"
},
"image": {
"title": "Yahoo! Weather",
"width": "142",
"height": "18",
"link": "http://weather.yahoo.com",
"url": "http://l.yimg.com/a/i/brand/purplelogo//uh/us/news-wea.gif"
},
"item": {
"title": "Conditions for Hyderabad, Telangana, IN at 04:30 AM IST",
"lat": "17.418409",
"long": "78.450012",
"link": "http://us.rd.yahoo.com/dailynews/rss/weather/Country__Country/*https://weather.yahoo.com/country/state/city-2295414/",
"pubDate": "Tue, 19 Dec 2017 04:30 AM IST",
"condition": {
"code": "27",
"date": "Tue, 19 Dec 2017 04:30 AM IST",
"temp": "61",
"text": "Mostly Cloudy"
},
"forecast": [{
"code": "34",
"date": "19 Dec 2017",
"day": "Tue",
"high": "82",
"low": "62",
"text": "Mostly Sunny"
}, {
"code": "32",
"date": "20 Dec 2017",
"day": "Wed",
"high": "81",
"low": "60",
"text": "Sunny"
}, {
"code": "32",
"date": "21 Dec 2017",
"day": "Thu",
"high": "82",
"low": "58",
"text": "Sunny"
}, {
"code": "32",
"date": "22 Dec 2017",
"day": "Fri",
"high": "82",
"low": "59",
"text": "Sunny"
}, {
"code": "32",
"date": "23 Dec 2017",
"day": "Sat",
"high": "83",
"low": "57",
"text": "Sunny"
}, {
"code": "32",
"date": "24 Dec 2017",
"day": "Sun",
"high": "80",
"low": "63",
"text": "Sunny"
}, {
"code": "32",
"date": "25 Dec 2017",
"day": "Mon",
"high": "81",
"low": "59",
"text": "Sunny"
}, {
"code": "32",
"date": "26 Dec 2017",
"day": "Tue",
"high": "81",
"low": "61",
"text": "Sunny"
}, {
"code": "34",
"date": "27 Dec 2017",
"day": "Wed",
"high": "81",
"low": "62",
"text": "Mostly Sunny"
}, {
"code": "32",
"date": "28 Dec 2017",
"day": "Thu",
"high": "79",
"low": "60",
"text": "Sunny"
}],
"description": "<![CDATA[<img src=\"http://l.yimg.com/a/i/us/we/52/27.gif\"/>\n \nCurrent Conditions:\n Mostly Cloudy\n \n \nForecast:\n Tue - Mostly Sunny. High: 82Low: 62\n Wed - Sunny. High: 81Low: 60\n Thu - Sunny. High: 82Low: 58\n Fri - Sunny. High: 82Low: 59\n Sat - Sunny. High: 83Low: 57\n \n \n<a href=\"http://us.rd.yahoo.com/dailynews/rss/weather/Country__Country/*https://weather.yahoo.com/country/state/city-2295414/\">Full Forecast at Yahoo! Weather</a>\n \n \n \n]]>",
"guid": {
"isPermaLink": "false"
}
}
}
}
}
}