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;//當(dāng)前計(jì)數(shù)器

    private Queue<double> dataQueue = new Queue<double>(100);//初始化隊(duì)列

    public NetworkMonitor()
    {
      InitializeComponent();
      InitCounterCategory();
      InitChart();
    }

    /// <summary>
    /// 初始化計(jì)數(shù)器信息
    /// </summary>
    private void InitCounterCategory() {
      //獲取所有的計(jì)數(shù)器類別
      var counterCategories = PerformanceCounterCategory.GetCategories().OrderBy(p=>p.CategoryName);
      int i=0;
      foreach (var counterCategory in counterCategories) {
        //屬于線程級別的不顯示
        if (counterCategory.CategoryName == "Thread") {
          continue;
        }
        //將信息綁定的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]);
      //給網(wǎng)絡(luò)監(jiān)控計(jì)數(shù)器賦值
      mCounter = pCounters[0];
      mCounter.NextValue();//初始值
    }

     //<summary>
     //初始化圖表
     //</summary>
    private void InitChart()
    {
      //定義圖表區(qū)域
      this.chart1.ChartAreas.Clear();
      ChartArea chartArea1 = new ChartArea("C1");
      this.chart1.ChartAreas.Add(chartArea1);
      //定義存儲和顯示點(diǎn)的容器
      this.chart1.Series.Clear();
      Series series1 = new Series("S1");
      series1.ChartArea = "C1";
      this.chart1.Series.Add(series1);
      //設(shè)置圖表顯示樣式
      this.chart1.ChartAreas[0].AxisY.ArrowStyle = AxisArrowStyle.SharpTriangle;
      this.chart1.ChartAreas[0].AxisY.Title = "Kkbps";//坐標(biāo)軸的標(biāo)題
      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;
      //設(shè)置標(biāo)題
      this.chart1.Titles.Clear();
      this.chart1.Titles.Add("S01");
      this.chart1.Titles[0].Text = "XXX網(wǎng)絡(luò)監(jiān)控顯示";
      this.chart1.Titles[0].ForeColor = Color.RoyalBlue;
      this.chart1.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);
      //設(shè)置圖表顯示樣式
      this.chart1.Series[0].Color = Color.LightGreen;
      this.chart1.Series[0].ChartType = SeriesChartType.Area;//圖表形狀
      this.chart1.Series[0].Points.Clear();
    }

    /// <summary>
    /// 啟動定時(shí)器
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btnStart_Click(object sender, EventArgs e)
    {
      this.timer1.Start();
      
    }

    /// <summary>
    /// 停止定時(shí)器
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btnStop_Click(object sender, EventArgs e)
    {
      this.timer1.Stop();
    }

    /// <summary>
    /// 定時(shí)執(zhí)行函數(shù)
    /// </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));
      }
    }

     //更新隊(duì)列中的值
    private void UpdateQueueValue()
    {

      if (dataQueue.Count > 100)
      {
        dataQueue.Dequeue();
      }
      //獲取的值就Byte/s 所以要除以1024
      dataQueue.Enqueue(mCounter.NextValue() / (1024));

    }

    /// <summary>
    /// 當(dāng)選中復(fù)選框時(shí)發(fā)生
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void tvCategory_AfterCheck(object sender, TreeViewEventArgs e)
    {
      bool flag = e.Node.Checked;//取得選中狀態(tài)，所有子節(jié)點(diǎn)的狀態(tài)保持一致
      CheckedStated(e.Node.Nodes, flag);
    }

    /// <summary>
    /// 采用遞歸方法修改節(jié)點(diǎn)的選中狀態(tài)
    /// </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);
        }
      }
    }
  }
}