C# 利用性能计数器监控网络状态

2017-01-07 08:37:38来源:cnblogs.com作者:飞翔的月亮人点击

本例是利用C#中的性能计数器(PerformanceCounter)监控网络的状态。并能够直观的展现出来

涉及到的知识点:

  • PerformanceCounter,表示 Windows NT 性能计数器组件。NextValue() 即获取计数器样本并为其返回计算所得值。
  • PerformanceCounterCategory 表示性能对象,它定义性能计数器的类别。通过这两个即可得到计数器的信息。
  • Chart 图表,VS自带的Chart图表,大大简化了对图表的开发。关于Chart,此前已有例子说明
  • Queue 队列表示对象的先进先出集合。关于Queue此前已有例子说明
  • TreeView 显示标记项的分层集合,每个标记项用一个 System.Windows.Forms.TreeNode 来表示。即VS自带的树状菜单
  • Timer 实现按用户定义的时间间隔引发事件的计时器。此计时器最宜用于 Windows 窗体应用程序中,并且必须在窗口中使用。定时刷新计数器中的值。

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效果图如下:

关于可用的计数器列表【计数器有很多,一级菜单是计数器的类别,二级菜单是计数器InstanceName,三级菜单是计数器名称】,如下图所示:

代码如下:

  1 using System;  2 using System.Collections.Generic;  3 using System.ComponentModel;  4 using System.Data;  5 using System.Drawing;  6 using System.Linq;  7 using System.Text;  8 using System.Windows.Forms;  9 using System.Windows.Forms.DataVisualization.Charting; 10 using System.Diagnostics; 11  12 namespace DemoSharp 13 { 14     public partial class NetworkMonitor : Form 15     { 16         private PerformanceCounter mCounter;//当前计数器 17  18         private Queue<double> dataQueue = new Queue<double>(100);//初始化队列 19  20         public NetworkMonitor() 21         { 22             InitializeComponent(); 23             InitCounterCategory(); 24             InitChart(); 25         } 26  27         /// <summary> 28         /// 初始化计数器信息 29         /// </summary> 30         private void InitCounterCategory() { 31             //获取所有的计数器类别 32             var counterCategories = PerformanceCounterCategory.GetCategories().OrderBy(p=>p.CategoryName); 33             int i=0; 34             foreach (var counterCategory in counterCategories) { 35                 //属于线程级别的不显示 36                 if (counterCategory.CategoryName == "Thread") { 37                     continue; 38                 } 39                 //将信息绑定的TreeView上 40                 this.tvCategory.CheckBoxes = true; 41                 this.tvCategory.Nodes.Add(counterCategory.CategoryName); 42                 string[] instanceNames = counterCategory.GetInstanceNames(); 43                 int j = 0; 44                 foreach (var instanceName in instanceNames) { 45                     this.tvCategory.Nodes[i].Nodes.Add(instanceName); 46                     var counters = counterCategory.GetCounters(instanceName).Select(p=>string.Format("{0}",p.CounterName)); 47                     int k = 0; 48                     foreach (var counter in counters) { 49                         this.tvCategory.Nodes[i].Nodes[j].Nodes.Add(counter); 50                         k++; 51                     } 52                     j++; 53                 } 54                 i++; 55             } 56             //初始化Counter 57             PerformanceCounterCategory pcCategory = new PerformanceCounterCategory("Network Interface"); 58             string[] iNames = pcCategory.GetInstanceNames(); 59             PerformanceCounter[] pCounters = pcCategory.GetCounters(iNames[0]); 60             //给网络监控计数器赋值 61             mCounter = pCounters[0]; 62             mCounter.NextValue();//初始值 63         } 64  65          //<summary> 66          //初始化图表 67          //</summary> 68         private void InitChart() 69         { 70             //定义图表区域 71             this.chart1.ChartAreas.Clear(); 72             ChartArea chartArea1 = new ChartArea("C1"); 73             this.chart1.ChartAreas.Add(chartArea1); 74             //定义存储和显示点的容器 75             this.chart1.Series.Clear(); 76             Series series1 = new Series("S1"); 77             series1.ChartArea = "C1"; 78             this.chart1.Series.Add(series1); 79             //设置图表显示样式 80             this.chart1.ChartAreas[0].AxisY.ArrowStyle = AxisArrowStyle.SharpTriangle; 81             this.chart1.ChartAreas[0].AxisY.Title = "Kkbps";//坐标轴的标题 82             this.chart1.ChartAreas[0].AxisY.TextOrientation = TextOrientation.Rotated270; 83             this.chart1.ChartAreas[0].AxisY.Minimum = 0; 84             this.chart1.ChartAreas[0].AxisY.Maximum = 50; 85             this.chart1.ChartAreas[0].AxisY.Interval = 5; 86             this.chart1.ChartAreas[0].AxisX.Interval = 5; 87             this.chart1.ChartAreas[0].AxisX.ArrowStyle = AxisArrowStyle.SharpTriangle; 88             this.chart1.ChartAreas[0].AxisX.Title = "Sec"; 89             this.chart1.ChartAreas[0].AxisX.TextOrientation = TextOrientation.Horizontal; 90             this.chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.Silver; 91             this.chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.Silver; 92             //设置标题 93             this.chart1.Titles.Clear(); 94             this.chart1.Titles.Add("S01"); 95             this.chart1.Titles[0].Text = "XXX网络监控显示"; 96             this.chart1.Titles[0].ForeColor = Color.RoyalBlue; 97             this.chart1.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F); 98             //设置图表显示样式 99             this.chart1.Series[0].Color = Color.LightGreen;100             this.chart1.Series[0].ChartType = SeriesChartType.Area;//图表形状101             this.chart1.Series[0].Points.Clear();102         }103 104         /// <summary>105         /// 启动定时器106         /// </summary>107         /// <param name="sender"></param>108         /// <param name="e"></param>109         private void btnStart_Click(object sender, EventArgs e)110         {111             this.timer1.Start();112             113         }114 115         /// <summary>116         /// 停止定时器117         /// </summary>118         /// <param name="sender"></param>119         /// <param name="e"></param>120         private void btnStop_Click(object sender, EventArgs e)121         {122             this.timer1.Stop();123         }124 125         /// <summary>126         /// 定时执行函数127         /// </summary>128         /// <param name="sender"></param>129         /// <param name="e"></param>130         private void timer1_Tick(object sender, EventArgs e)131         {132             UpdateQueueValue();133             this.chart1.Series[0].Points.Clear();134             if (dataQueue.Max() > this.chart1.ChartAreas[0].AxisY.Maximum) {135                 this.chart1.ChartAreas[0].AxisY.Maximum = Math.Ceiling(dataQueue.Max() / 10) * 10;136                 this.chart1.ChartAreas[0].AxisY.Interval = this.chart1.ChartAreas[0].AxisY.Maximum / 10;137             }138             for (int i = 0; i < dataQueue.Count; i++)139             {140                 this.chart1.Series[0].Points.AddXY((i + 1), dataQueue.ElementAt(i));141             }142         }143 144          //更新队列中的值145         private void UpdateQueueValue()146         {147 148             if (dataQueue.Count > 100)149             {150                 dataQueue.Dequeue();151             }152             //获取的值就Byte/s 所以要除以1024153             dataQueue.Enqueue(mCounter.NextValue() / (1024));154 155         }156 157         /// <summary>158         /// 当选中复选框时发生159         /// </summary>160         /// <param name="sender"></param>161         /// <param name="e"></param>162         private void tvCategory_AfterCheck(object sender, TreeViewEventArgs e)163         {164             bool flag = e.Node.Checked;//取得选中状态,所有子节点的状态保持一致165             CheckedStated(e.Node.Nodes, flag);166         }167 168         /// <summary>169         /// 采用递归方法修改节点的选中状态170         /// </summary>171         /// <param name="nodes"></param>172         /// <param name="flag"></param>173         private void CheckedStated(TreeNodeCollection nodes,bool flag) {174             175             if (nodes != null)176             {177                 foreach (TreeNode node in nodes)178                 {179                     node.Checked = flag;180                     CheckedStated(node.Nodes, flag);181                 }182             }183         }184     }185 }


备注:性能计数器类别获取出现异常的解决方案:

在CMD命令窗口中,执行 LODCTR /R 重置性能计数器。如下图所示:

如果依然不行,尝试以管理员身份运行【勾上】,如下图所示:

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