using System;
using System.Threading;
using System.Net.NetworkInformation;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MyNet {
    public partial class myNetForm : Form {
        public myNetForm() {
            InitializeComponent();
            Control.CheckForIllegalCrossThreadCalls = false;

            Thread t = new Thread(PingStatus);
            t.Start();
        }

        private void PingStatus() {
            Ping p = new Ping();
            PingReply pr;

            while(true) {
                try {
                    pr = p.Send(cbPingAddress.Text);
                    lblErrorMessage.Text = "";

                    if (pr.Status == IPStatus.Success) {
                        lblPing.Text = pr.RoundtripTime + "";

                        if (pr.RoundtripTime > 300) lblPing.BackColor = Color.Red;
                        else if (pr.RoundtripTime > 100) lblPing.BackColor = Color.Orange;
                        else if (pr.RoundtripTime > 10) lblPing.BackColor = Color.Yellow;
                        else lblPing.BackColor = Color.LightGreen;
                    }
                    else throw new Exception(pr.Status.ToString());
                } catch (Exception ex) {
                    lblErrorMessage.Text = ex.Message;

                    lblPing.BackColor = Color.Red;
                    lblPing.Text = "-1";
                }
                Thread.Sleep(1000);
            }
        }

        private void Form1_Load(object sender, EventArgs e) {
        }
    }
}