C# Label shows Weather Information

Question

Hey
I want to create a simple weather app. A Label should show if its cloudy or sunny or rain and all the other things and the temperature in celsius. But because im a noob i dont know. So please help. Thanks

Answer 1

There is replacement for a paid service for obtaining this information although the following will be good enough. I did not do the image aspect.

https://github.com/karenpayneoregon/windows-forms-csharp/tree/master/OpenWeatherMapApp

• Requires Json.Net
• Code below does not show required classes which are included.

Form code

using System;
using System.Net.Http;
using System.Windows.Forms;
using Newtonsoft.Json;
using OpenWeatherMapApp.Classes;

namespace OpenWeatherMapApp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private async void GetButton_Click(object sender, EventArgs e)
        {
            var http = new HttpClient();

            /*-------------------------------------
             * Set up to your long lat for your area
             -------------------------------------*/

            var url = "https://forecast.weather.gov/MapClick.php?lat=44.9429&lon=-123.0351&FcstType=json";

            http.DefaultRequestHeaders.Add(
                "User-Agent", 
                "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 " + 
                     "(KHTML, like Gecko) Chrome/51.0.2704.84 Safari/537.36");

            var response = await http.GetAsync(url);

            if (response.IsSuccessStatusCode)
            {
                var json = await response.Content.ReadAsStringAsync();
                var weather = JsonConvert.DeserializeObject<WeatherRoot>(json);


                weatherLabel.InvokeIfRequired(label =>
                {
                    label.Text = $"{weather.Current.Temperature} degrees, {weather.Current.Weather}";
                });
            }
        }
    }
}

Answer 2

If you want weather from your current location, you must first get Latitute/Longitude, then you can read the weather from "tile-service.weather.microsoft.com"

A test =>

using System.Xml;  
// Add reference to : System.Device  
using System.Device.Location;  
  
public partial class Form1 : Form  
{  
    public Form1()  
    {  
        //InitializeComponent();  
        this.Load += new System.EventHandler(this.Form1_Load);  
    }  
  
    private void button1_Click(object sender, EventArgs e)  
    {  
        // https://learn.microsoft.com/en-us/dotnet/api/system.device.location.geocoordinate.latitude?view=netframework-4.8  
        GeoCoordinateWatcher watcher;  
        GeoCoordinate coordinate = null;  
        watcher = new GeoCoordinateWatcher();  
        watcher.PositionChanged += (sender1, e1) =>  
        {  
            coordinate = e1.Position.Location;  
            watcher.Stop();  
            if (coordinate != null)  
            {  
                string sLocation = null;  
                string sTemperature = null;  
                string sWeather = null;  
  
                double nLatitute = coordinate.Latitude;  
                double nLongitude = coordinate.Longitude;  
                XmlTextReader reader = null;  
                try  
                {  
                    string sLatitute = nLatitute.ToString().Replace(",", ".");  
                    string sLongitude = nLongitude.ToString().Replace(",", ".");  
                    string sAddress = String.Format("https://tile-service.weather.microsoft.com/livetile/front/{0},{1}", sLatitute, sLongitude);  
                    int nCpt = 0;  
                    reader = new XmlTextReader(sAddress);  
                    reader.WhitespaceHandling = WhitespaceHandling.None;                        
                    while (reader.Read())  
                    {  
                        if (reader.NodeType == XmlNodeType.Text)  
                        {  
                            if (nCpt == 0)  
                                sLocation = reader.Value;  
                            else if (nCpt == 1)  
                                sTemperature = reader.Value;  
                            else if (nCpt == 2)  
                                sWeather = reader.Value;  
                            nCpt++;  
                        }                          
                    }  
                }  
                finally  
                {  
                    if (reader != null)  
                        reader.Close();  
                }  
                string sTemperatureF = sTemperature.Replace("°", "");  
                double nTemperatureC = (Double.Parse(sTemperatureF) -32.0)*(double)5/9;  
                string sTemperatureC = nTemperatureC.ToString("#.#");  
                label1.Text = String.Format("{0}, {1}F({2}°C), {3}", sLocation, sTemperature, sTemperatureC, sWeather);  
            }  
        };  
        watcher.Start();          
    }  
  
    private System.Windows.Forms.Button button1;  
    private System.Windows.Forms.Label label1;  
    private void Form1_Load(object sender, EventArgs e)  
    {  
        this.button1 = new System.Windows.Forms.Button();  
        this.label1 = new System.Windows.Forms.Label();  
  
        this.button1.Location = new System.Drawing.Point(40, 76);  
        this.button1.Name = "button1";  
        this.button1.Size = new System.Drawing.Size(75, 23);  
        this.button1.Text = "Get infos";  
        this.button1.UseVisualStyleBackColor = true;  
        this.button1.Click += new System.EventHandler(this.button1_Click);  
  
        this.label1.AutoSize = true;  
        this.label1.Location = new System.Drawing.Point(130, 81);  
        this.label1.Name = "label1";  
        this.label1.Size = new System.Drawing.Size(115, 13);  
        this.label1.Text = "[Location, T°, weather]";  
  
        this.Name = "Form1";  
        this.ClientSize = new System.Drawing.Size(425, 182);  
        this.Controls.Add(this.label1);  
        this.Controls.Add(this.button1);  
    }  
}