獲取網速

獲取網絡傳輸速度 

使用PerformanceCounter類（System.Diagnostics）

1、源碼：

     class NETSpeed
      {
        //網絡發送速度
        public float NetTrafficSend { get; set; }
        //網絡接收速度
        public float NetTrafficReceive { get; set; }



        private PerformanceCounterCategory performanceNetCounterCategory;

        private PerformanceCounter[] trafficSentCounters;

        private PerformanceCounter[] trafficReceivedCounters;
        //用於記錄性能對象實例名稱
        private string[] interfaces = null;

        public void InitNetCounters()
        {

            performanceNetCounterCategory = new PerformanceCounterCategory("Network Interface");
            //獲取性能對象實例名稱
            interfaces = performanceNetCounterCategory.GetInstanceNames();

            int length = interfaces.Length;

            if (length > 0)

            {

                trafficSentCounters = new PerformanceCounter[length];

                trafficReceivedCounters = new PerformanceCounter[length];

            }

            for (int i = 0; i < length; i++)

            {

                trafficReceivedCounters[i] = new PerformanceCounter("Network Interface", "Bytes Received/sec", interfaces[i]);

                trafficSentCounters[i] = new PerformanceCounter("Network Interface", "Bytes Sent/sec", interfaces[i]);

            }

        }

        /// <summary>
        /// 網絡上傳速度
        /// </summary>
        public void GetCurretTrafficSent()

        {

            int length = interfaces.Length;

            float sendSum = 0.0F;
            for (int i = 0; i < length; i++)
            {
                 //獲取上傳數據量
                float temp = trafficSentCounters[i].NextValue();
                //第一次獲取值爲0的處理方法
                if (i== 0 && temp ==0)
                {
                    Thread.Sleep(500);
                    temp = trafficSentCounters[i].NextValue();
                }
                sendSum += temp;

            }
            float tmp = (sendSum / 1024);

            NetTrafficSend = (float)(Math.Round((double)tmp, 1));

        }
        /// <summary>
        /// 網絡下載速度
        /// </summary>
        public void GetCurrentTrafficReceived()
        {
            int length = interfaces.Length;

            float receiveSum = 0.0F;

            for (int i = 0; i < length; i++)
            {
                //獲取下載數據量
                float temp = trafficReceivedCounters[i].NextValue();
                if (i== 0 && temp ==0)
                {
                    Thread.Sleep(500);
                    temp = trafficReceivedCounters[i].NextValue();
                }
                receiveSum += temp;
            }

            float tmp = (receiveSum / 1024);

            NetTrafficReceive = (float)(Math.Round((double)tmp, 1));

        }

   }

使用方法：將上述內容保存爲.cs類 

調用方法：

            //實例化對象 
            NETSpeed netSpeed = new NETSpeed();
            //初始化
            netSpeed.InitNetCounters();
            //獲取上傳速度
            netSpeed.GetCurretTrafficSent();
            float netTrafficSent = netSpeed.NetTrafficSend;
            Console.WriteLine("網絡上傳速度:" + netTrafficSent + "KB/s");
            //獲取下載速度
            netSpeed.GetCurrentTrafficReceived();
            float netTrafficReceive = netSpeed.NetTrafficReceive;
            Console.WriteLine("網絡下載速度:" + netTrafficReceive + "KB/s");

以上方法獲取的爲一秒內的網速

2、運行結果：

 

對比任務管理器：（數據不是相同時刻，此處只爲對比）

3、注意事項：

1、注意單位的不同，代碼處獲取的單位爲KB/S  任務管理器的爲Kb/s     兩者相差8倍

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