AIParkingApplication/AIParkingApplication/Statistic.cs

using System;
using System.Windows.Forms;
using System.Threading;
using Newtonsoft.Json;
using System.Net.Http;

namespace AIParkingApplication
{
    public partial class Statistic : UserControl
    {
        private readonly HttpClient client;
        private readonly Thread thrStatistics;
        private readonly TimeSpan updateInterval;
        private ParkInfo parkInfo;

        private Label lblLoaiXe;
        private Label lblXeMay;
        private Label lblOto;
        private Label lblSoLuong;
        private Label lblSoLuongXeMay;
        private Label lblSoLuongOto;

        public Statistic(string baseAddress, TimeSpan updateInterval)
        {
            InitializeComponent();
            this.updateInterval = updateInterval;
            client = new HttpClient { BaseAddress = new Uri(baseAddress), Timeout = TimeSpan.FromMilliseconds(5000) };
            thrStatistics = new Thread(new ThreadStart(GetStatistic)) { IsBackground = true };
            thrStatistics.Start();
        }

        private void GetStatistic()
        {
            while (true)
            {
                GetDataFromServer();
                ShowInfo();
                Thread.Sleep(updateInterval);
            }
        }

        private async void GetDataFromServer()
        {
            try
            {
                HttpResponseMessage response = await client.GetAsync("/api/statistics");
                response.EnsureSuccessStatusCode();
                parkInfo = await response.Content.ReadAsAsync<ParkInfo>();
                
                if (string.IsNullOrEmpty(parkInfo.TotalIn))
                {
                    parkInfo.TotalIn = "0";
                }
                if (string.IsNullOrEmpty(parkInfo.TotalOut))
                {
                    parkInfo.TotalOut = "0";
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"SendApiStatisticRequest : {ex.Message}");
            }
        }

        private void ShowInfo()
        {
            if (parkInfo == null)
            {
                return;
            }
            lblSoLuongXeMay.Invoke(new Action(() =>
            {
                lblSoLuongXeMay.Text = parkInfo.NumberOfMoto.ToString();
            }));
            lblSoLuongOto.Invoke(new Action(() =>
            {
                lblSoLuongOto.Text = parkInfo.NumberOfCar.ToString();
            }));
            lblVehicleTotalIn.Invoke(new Action(() =>
            {
                lblVehicleTotalIn.Text = parkInfo.TotalIn;
            }));
            lblVehicleTotalOut.Invoke(new Action(() =>
            {
                lblVehicleTotalOut.Text = parkInfo.TotalOut;
            }));
        }


        private void Statistic_Load(object sender, EventArgs e)
        {
            tlpStatisticTable.BorderStyle = BorderStyle.FixedSingle;
            tlpStatisticTable.CellBorderStyle = TableLayoutPanelCellBorderStyle.Single;

            System.Drawing.Font labelFont = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, 0);
            lblLoaiXe = new Label() { Text = "Loại xe", Font = labelFont };
            lblXeMay = new Label() { Text = "Xe máy", Font = labelFont };
            lblOto = new Label() { Text = "Ô tô", Font = labelFont };
            lblSoLuong = new Label() { Text = "Số Lượng", Font = labelFont };
            lblSoLuongXeMay = new Label() { Text = "0", Font = labelFont };
            lblSoLuongOto = new Label() { Text = "0", Font = labelFont };

            tlpStatisticTable.Controls.Add(lblLoaiXe, 0, 0);
            tlpStatisticTable.Controls.Add(lblXeMay, 0, 1);
            tlpStatisticTable.Controls.Add(lblOto, 0, 2);
            tlpStatisticTable.Controls.Add(lblSoLuong, 1, 0);
            tlpStatisticTable.Controls.Add(lblSoLuongXeMay, 1, 1);
            tlpStatisticTable.Controls.Add(lblSoLuongOto, 1, 2);

        }
        public class ParkInfo
        {
            [JsonProperty("oto")]
            public int NumberOfCar { get; set; }

            [JsonProperty("moto")]
            public int NumberOfMoto { get; set; }

            [JsonProperty("total_in")]
            public string TotalIn { get; set; }

            [JsonProperty("total_out")]
            public string TotalOut { get; set; }
        }
    }
}