Program in C# + VK API?

Question

C++ / C#

Good day! There is a certain program that receives messages through the messages.get method (vk api), I would like to know how to make the program work in real time?
Examples with code are welcome.
Thanks in advance.

Answer 1

The easiest option - using the Timer class to make a small background timer with a small interval - you will receive messages with an acceptable delay of 400-600ms

Answer 2

It is necessary to loop the execution of the program

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;
using System.Web;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace ConsoleApplication14
{
    class Program
    {
        private static System.Timers.Timer aTimer;
        public static void Main()
        {
            /*string link_in_pogoda = "http://export.yandex.ru/weather-ng/forecasts/29642.xml";
            string resultPage_pogoda = "";
            HttpWebRequest request_pogoda = (HttpWebRequest)WebRequest.Create(link_in_pogoda);
            HttpWebResponse response_pogoda = (HttpWebResponse)request_pogoda.GetResponse();
            Encoding Code_pogoda = Encoding.GetEncoding(1251);
            using (StreamReader sr_pogoda = new StreamReader(response_pogoda.GetResponseStream(), Encoding.UTF8, true))
            {
                resultPage_pogoda = sr_pogoda.ReadToEnd();
                sr_pogoda.Close();
            }
            Console.WriteLine(resultPage_pogoda); */
            while (true)
            {
                aTimer = new System.Timers.Timer();
                aTimer.Interval = 600;
                aTimer = new System.Timers.Timer(2000);
                aTimer.Enabled = true;
                aTimer.Elapsed += OnTimedEvent;
                Console.ReadLine();
            }
        }
        private static void OnTimedEvent(Object source, System.Timers.ElapsedEventArgs e)
        {

            string link = protocol + url + method + count + ampersand + token + ampersand + expires_in + ampersand + user_id + ampersand + revoke;
            string resultPage = "";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(link);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Encoding Code = Encoding.GetEncoding(1251);
            using (StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8, true))
            {
                resultPage = sr.ReadToEnd();
                sr.Close();
            }
            JObject testObject = JObject.Parse(resultPage);
            string body = "";
            int id_vk = -1;
            foreach (JToken j in testObject["response"])
            {
                if (j is JObject)
                {
                    body = (string)j["body"];
                    id_vk = (int)j["uid"];
                }
            }
            if (body.Contains("погод"))
            {
                const string protocol_send_messenge = "https://";
                const string url_send_messenge = "api.vkontakte.ru/method/";
                string user_id_ = "user_id=" + id_vk;
                const string method_send_messenge = "messages.send?";
                const string messenge = "message=тестинг";
                string link_send_messenge = protocol_send_messenge + url_send_messenge + method_send_messenge;
                HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(link_send_messenge);
                req.Method = "POST";
                req.ContentType = "application/x-www-form-urlencoded";

                byte[] SomeBytes = null;
                string FormParams = user_id_ + ampersand + messenge + ampersand + token;
                SomeBytes = Encoding.UTF8.GetBytes(FormParams);
                req.ContentLength = SomeBytes.Length;
                Stream newStream = req.GetRequestStream();
                newStream.Write(SomeBytes, 0, SomeBytes.Length);
            }
        }
    }
}

Answer 3

Wrong question, leads to not quite correct answers. Read VK API about long pull server.