NetworkMonitor底层实现

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;a
using System.Timers;

namespace NetMonitor
{
    class NetworkMonitorSM
    {
        public double timerInterval = 1000;
        public string networkName = "";
        public Action<MonitorInfo> callback = null;

        Timer timer = null;
        List<PerformanceCounter> downloadCounters = null;
        List<PerformanceCounter> uploadCounters = null;
        public NetworkMonitorSM()
        {
            downloadCounters = new List<PerformanceCounter>();
            uploadCounters = new List<PerformanceCounter>();
        }

        public void StartMonitor()
        {
            InitTimer();
            InitNetCategory();
            timer.Start();
        }

        public void InitTimer()
        {
            timer = new Timer();
            timer.Interval = timerInterval;
            timer.Elapsed += timer_Elapsed;
        }

        public void InitNetCategory()
        {
            PerformanceCounterCategory category = new PerformanceCounterCategory("Network Interface");

            foreach (string name in category.GetInstanceNames())
            {
                if (name == "MS TCP Loopback interface")
                    continue;
                if (!string.IsNullOrEmpty(networkName))
                {
                    if (networkName.Equals(name))
                    {
                        downloadCounters.Add(new PerformanceCounter("Network Interface", "Bytes Received/sec", name));
                        uploadCounters.Add(new PerformanceCounter("Network Interface", "Bytes Sent/sec", name));
                    }
                }
                else
                {
                    downloadCounters.Add(new PerformanceCounter("Network Interface", "Bytes Received/sec", name));
                    uploadCounters.Add(new PerformanceCounter("Network Interface", "Bytes Sent/sec", name));
                }
            }

            if (downloadCounters.Count <= 0)
                Console.WriteLine("Do not Has the Network named with [" + networkName + "]");
        }

        void timer_Elapsed(object sender, ElapsedEventArgs e)
        {
            float totalDownlaod = 0;
            float totalUplaod = 0;
            foreach (PerformanceCounter pc in downloadCounters)
            {
                totalDownlaod += pc.NextValue();
            }
            foreach (PerformanceCounter pc in uploadCounters)
            {
                totalUplaod += pc.NextValue();
            }

            MonitorInfo mi = new MonitorInfo();
            mi.downloadBytes = totalDownlaod;
            mi.uploadBytes = totalUplaod;
            if (callback != null)
                callback(mi);
        }

    }

    public class MonitorInfo
    {
        public double downloadBytes;
        public double uploadBytes;

        public override string ToString()
        {
            int d = (int)(downloadBytes / 1024f);
            int u = (int)(uploadBytes / 1024f);
            string ds = "k/s";
            string us = "k/s";

            return "D : " + d.ToString() + ds + "   U : " + u.ToString() + us;
        }
    }
}

调用方法

private void MonitorStart()
{
    NetworkMonitorSM sm = new NetworkMonitorSM();
    sm.callback += MonitorCallBack;
    sm.StartMonitor();
}

private void MonitorCallBack(MonitorInfo info)
{
    Console.WriteLine(info.ToString());
}