C# How to pull the weather?

Question

C++ / C#

I googled the topic, everywhere there are only paid services like openwheatherapi.
Offer a free option?

Answer 1

they are all paid if you need something serious. And so, openwheatherapi gives quite sane functionality in the free edition

Answer 2

https://rp5.ru/%D0%9F%D0%BE%D0%B3%D0%BE%D0%B4%D0%B...
www.realmeteo.ru/moscow/1/history/2017.json

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net.Http;
using System.Text;
using ImportData.Code;
using ImportData.Model;
using Newtonsoft.Json;

namespace ImportData.Importer
{
    public class RealMediaParser
    {
        // http://www.realmeteo.ru/moscow/1/history/2017.json
        private const string _baseUrl = "http://www.realmeteo.ru";
        public string GetJson(string slug)
        {
            var client = new HttpClient();
            var uri = GetHistoricatUri(slug);
            var data = client.GetStringAsync(uri);
            data.Wait(5000);
            return data.Result;
        }

        private string GetHistoricatUri(string slug)
        {
            return $"http://www.realmeteo.ru/{slug}/1/history/2017.json";
        }
        public Record[] ConvertJson2Records(string text)
        {
            
            var model = JsonConvert.DeserializeObject<WeatherRecordModel>(text);
            model.Interval /= 1000;
            model.Start /= 1000;
            var start = model.Start;
            var i = 0;
            var outlist = new List<Record>();
            var old = 0;
            var hold = 100;
            while (start < model.Stop)
            {
                float h=100, 
                    t = 0;
                try
                {
                    if (model.Data.Humidity[i].HasValue)
                        h = (int)model.Data.Humidity[i].Value;
                    if (model.Data.Temperature[i].HasValue)
                        t = (int)model.Data.Temperature[i].Value;
                    var record = new Record();
                    record.Date = start.UnixTimestampDateTime();
                    record.Humidity = h;
                    if (t < -100)
                        t = old;
                    if (h < 0)
                        h = hold;
                    record.Temperature = old =  (int) t;
                    record.Humidity = hold = (int)h;
                    outlist.Add(record);
                }
                catch (Exception ex)
                {
                    Trace.WriteLine(ex);
                }               
                i++;
                start += model.Interval;
            }

            return outlist.ToArray();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Globalization;
using ImportData.Code;

namespace ImportData.Importer
{
    public class Rp5Parser
    {

        public Rp5Parser(string[] lines,
            int skipLines = 6,
            int dateColumn = 0,
            int temperatureColumn = 1,
            int humidity = 4)
        {
            SkipLines = skipLines;
            DateColumn = dateColumn;
            TemperatureColumn = temperatureColumn;
            HumidityColumn = humidity;
            float tpp = 0, upp = 100;

            string[] headers = GetString(lines[skipLines]);
            DateName = headers[0];
            TemperatureName = headers[1];
            HumidityName = headers[2];
            var ci = (CultureInfo)CultureInfo.CurrentCulture.Clone();
            ci.NumberFormat.CurrencyDecimalSeparator = ".";
            var records = new List<Record>();
            for (var i = SkipLines + 1; i < lines.Length; i++)
            {
                var line = lines[i];
                if (string.IsNullOrWhiteSpace(line)) break;
                var fields = GetString(line);

                var d = fields[0];
                var t = fields[1];
                var u = fields[2];

                var dp = DateTime.ParseExact(d, "dd.MM.yyyy HH:mm", ci.DateTimeFormat);
                float tp, up;
                if (!float.TryParse(t, NumberStyles.Any, ci, out tp))
                {
                    tp = tpp;
                }
                if (!float.TryParse(u, NumberStyles.Any, ci, out up))
                {
                    up = upp;
                }
                records.Add(new Record() { Date = dp, Temperature = tp, Humidity = up });
                tpp = tp;
                upp = up;
            }

            Records = records.ToArray();
        }

        private string[] GetString(string line)
        {
            var fields = line.Split(';');
            var d = fields[DateColumn].Replace("\"", "");
            var t = fields[TemperatureColumn].Replace("\"", "");
            var h = fields[HumidityColumn].Replace("\"", "");
            return new[] { d, t, h };
        }
        public int SkipLines { get; set; }
        public int DateColumn { get; set; }
        public string DateName { get; set; }
        public int TemperatureColumn { get; set; }
        public string TemperatureName { get; set; }
        public Record[] Records { get; set; }
        public int HumidityColumn { get; set; }
        public string HumidityName { get; set; }

    }
}

Answer 3

Look, here's a vid.
Everything is fast and clear. And even if it's not clear, it will work)
https://www.youtube.com/watch?v=k91jTTdr0GM