C#利用性能计数器监控网络状态

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Windows.Forms.DataVisualization.Charting;using System.Diagnostics;namespace DemoSharp{  public partial class NetworkMonitor : Form  {    private PerformanceCounter mCounter;//当前计数器    private Queue<double> dataQueue = new Queue<double>(100);//初始化队列    public NetworkMonitor()    {      InitializeComponent();      InitCounterCategory();      InitChart();    }    /// <summary>    /// 初始化计数器信息    /// </summary>    private void InitCounterCategory() {      //获取所有的计数器类别      var counterCategories = PerformanceCounterCategory.GetCategories().OrderBy(p=>p.CategoryName);      int i=0;      foreach (var counterCategory in counterCategories) {        //属于线程级别的不显示        if (counterCategory.CategoryName == "Thread") {          continue;        }        //将信息绑定的TreeView上        this.tvCategory.CheckBoxes = true;        this.tvCategory.Nodes.Add(counterCategory.CategoryName);        string[] instanceNames = counterCategory.GetInstanceNames();        int j = 0;        foreach (var instanceName in instanceNames) {          this.tvCategory.Nodes[i].Nodes.Add(instanceName);          var counters = counterCategory.GetCounters(instanceName).Select(p=>string.Format("{0}",p.CounterName));          int k = 0;          foreach (var counter in counters) {            this.tvCategory.Nodes[i].Nodes[j].Nodes.Add(counter);            k++;          }          j++;        }        i++;      }      //初始化Counter      PerformanceCounterCategory pcCategory = new PerformanceCounterCategory("Network Interface");      string[] iNames = pcCategory.GetInstanceNames();      PerformanceCounter[] pCounters = pcCategory.GetCounters(iNames[0]);      //给网络监控计数器赋值      mCounter = pCounters[0];      mCounter.NextValue();//初始值    }     //<summary>     //初始化图表     //</summary>    private void InitChart()    {      //定义图表区域      this.chart1.ChartAreas.Clear();      ChartArea chartArea1 = new ChartArea("C1");      this.chart1.ChartAreas.Add(chartArea1);      //定义存储和显示点的容器      this.chart1.Series.Clear();      Series series1 = new Series("S1");      series1.ChartArea = "C1";      this.chart1.Series.Add(series1);      //设置图表显示样式      this.chart1.ChartAreas[0].AxisY.ArrowStyle = AxisArrowStyle.SharpTriangle;      this.chart1.ChartAreas[0].AxisY.Title = "Kkbps";//坐标轴的标题      this.chart1.ChartAreas[0].AxisY.TextOrientation = TextOrientation.Rotated270;      this.chart1.ChartAreas[0].AxisY.Minimum = 0;      this.chart1.ChartAreas[0].AxisY.Maximum = 50;      this.chart1.ChartAreas[0].AxisY.Interval = 5;      this.chart1.ChartAreas[0].AxisX.Interval = 5;      this.chart1.ChartAreas[0].AxisX.ArrowStyle = AxisArrowStyle.SharpTriangle;      this.chart1.ChartAreas[0].AxisX.Title = "Sec";      this.chart1.ChartAreas[0].AxisX.TextOrientation = TextOrientation.Horizontal;      this.chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.Silver;      this.chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.Silver;      //设置标题      this.chart1.Titles.Clear();      this.chart1.Titles.Add("S01");      this.chart1.Titles[0].Text = "XXX网络监控显示";      this.chart1.Titles[0].ForeColor = Color.RoyalBlue;      this.chart1.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);      //设置图表显示样式      this.chart1.Series[0].Color = Color.LightGreen;      this.chart1.Series[0].ChartType = SeriesChartType.Area;//图表形状      this.chart1.Series[0].Points.Clear();    }    /// <summary>    /// 启动定时器    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    private void btnStart_Click(object sender, EventArgs e)    {      this.timer1.Start();          }    /// <summary>    /// 停止定时器    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    private void btnStop_Click(object sender, EventArgs e)    {      this.timer1.Stop();    }    /// <summary>    /// 定时执行函数    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    private void timer1_Tick(object sender, EventArgs e)    {      UpdateQueueValue();      this.chart1.Series[0].Points.Clear();      if (dataQueue.Max() > this.chart1.ChartAreas[0].AxisY.Maximum) {        this.chart1.ChartAreas[0].AxisY.Maximum = Math.Ceiling(dataQueue.Max() / 10) * 10;        this.chart1.ChartAreas[0].AxisY.Interval = this.chart1.ChartAreas[0].AxisY.Maximum / 10;      }      for (int i = 0; i < dataQueue.Count; i++)      {        this.chart1.Series[0].Points.AddXY((i + 1), dataQueue.ElementAt(i));      }    }     //更新队列中的值    private void UpdateQueueValue()    {      if (dataQueue.Count > 100)      {        dataQueue.Dequeue();      }      //获取的值就Byte/s 所以要除以1024      dataQueue.Enqueue(mCounter.NextValue() / (1024));    }    /// <summary>    /// 当选中复选框时发生    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    private void tvCategory_AfterCheck(object sender, TreeViewEventArgs e)    {      bool flag = e.Node.Checked;//取得选中状态，所有子节点的状态保持一致      CheckedStated(e.Node.Nodes, flag);    }    /// <summary>    /// 采用递归方法修改节点的选中状态    /// </summary>    /// <param name="nodes"></param>    /// <param name="flag"></param>    private void CheckedStated(TreeNodeCollection nodes,bool flag) {            if (nodes != null)      {        foreach (TreeNode node in nodes)        {          node.Checked = flag;          CheckedStated(node.Nodes, flag);        }      }    }  }}