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詳解C#獲取特定進程CPU和內(nèi)存使用率

更新時間：2016年11月18日 10:55:21 作者：maowang

本篇文章主要介紹詳解C#獲取特定進程CPU和內(nèi)存使用率，非常具有實用價值，需要的朋友可以參考下。

首先是獲取特定進程對象，可以使用Process.GetProcesses()方法來獲取系統(tǒng)中運行的所有進程，或者使用Process.GetCurrentProcess()方法來獲取當(dāng)前程序所對應(yīng)的進程對象。當(dāng)有了進程對象后，可以通過進程對象名稱來創(chuàng)建PerformanceCounter類型對象，通過設(shè)定PerformanceCounter構(gòu)造函數(shù)的參數(shù)實現(xiàn)獲取特定進程的CPU和內(nèi)存使用情況。

具體實例代碼如下：

首先是獲取本機中所有進程對象，分別輸出某一時刻各個進程的內(nèi)存使用情況：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Threading;

namespace CSharpPerformance
{//該程序可以實時監(jiān)控所有進程或者指定進程的工作集、私有工作集
  class Program
  {
    static void Main(string[] args)
    {
      //新建一個Stopwatch變量用來統(tǒng)計程序運行時間
      Stopwatch watch = Stopwatch.StartNew();
      //獲取本機運行的所有進程ID和進程名,并輸出哥進程所使用的工作集和私有工作集
      foreach (Process ps in Process.GetProcesses())
      {
        PerformanceCounter pf1 = new PerformanceCounter("Process", "Working Set - Private", ps.ProcessName);
        PerformanceCounter pf2 = new PerformanceCounter("Process", "Working Set", ps.ProcessName);
        Console.WriteLine("{0}:{1} {2:N}KB", ps.ProcessName, "工作集(進程類)", ps.WorkingSet64 / 1024);
        Console.WriteLine("{0}:{1} {2:N}KB", ps.ProcessName, "工作集    ", pf2.NextValue() / 1024);
        //私有工作集
        Console.WriteLine("{0}:{1} {2:N}KB", ps.ProcessName, "私有工作集  ", pf1.NextValue() / 1024);

      }

      watch.Stop();
      Console.WriteLine(watch.Elapsed);
      Console.ReadLine();
    }
  }
}

其中，工作集ps.WorkingSet64是靜態(tài)的，pf2.NextValue()是動態(tài)變化的，工作集包含進程運行時其獨占的內(nèi)存和與其他進程共享的內(nèi)存的和，而私有工作集是只包含進程獨占的內(nèi)存。

下面一組代碼可以動態(tài)顯示本程序所對應(yīng)的進程的CPU和內(nèi)存使用率的變化：

首先是SystemInfo.cs類：

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading;
using System.IO;
using System.Text;
using System.Management;
using System.Runtime.InteropServices;

namespace CSharpPerformance
{
  public class SystemInfo
  {
    private int m_ProcessorCount = 0;  //CPU個數(shù)
    private PerformanceCounter pcCpuLoad;  //CPU計數(shù)器
    private long m_PhysicalMemory = 0;  //物理內(nèi)存

    private const int GW_HWNDFIRST = 0;
    private const int GW_HWNDNEXT = 2;
    private const int GWL_STYLE = (-16);
    private const int WS_VISIBLE = 268435456;
    private const int WS_BORDER = 8388608;

    #region AIP聲明
    [DllImport("IpHlpApi.dll")]
    extern static public uint GetIfTable(byte[] pIfTable, ref uint pdwSize, bool bOrder);

    [DllImport("User32")]
    private extern static int GetWindow(int hWnd, int wCmd);

    [DllImport("User32")]
    private extern static int GetWindowLongA(int hWnd, int wIndx);

    [DllImport("user32.dll")]
    private static extern bool GetWindowText(int hWnd, StringBuilder title, int maxBufSize);

    [DllImport("user32", CharSet = CharSet.Auto)]
    private extern static int GetWindowTextLength(IntPtr hWnd);
    #endregion

    #region 構(gòu)造函數(shù)
    /// <summary>
    /// 構(gòu)造函數(shù)，初始化計數(shù)器等
    /// </summary>
    public SystemInfo()
    {
      //初始化CPU計數(shù)器
      pcCpuLoad = new PerformanceCounter("Processor", "% Processor Time", "_Total");
      pcCpuLoad.MachineName = ".";
      pcCpuLoad.NextValue();

      //CPU個數(shù)
      m_ProcessorCount = Environment.ProcessorCount;

      //獲得物理內(nèi)存
      ManagementClass mc = new ManagementClass("Win32_ComputerSystem");
      ManagementObjectCollection moc = mc.GetInstances();
      foreach (ManagementObject mo in moc)
      {
        if (mo["TotalPhysicalMemory"] != null)
        {
          m_PhysicalMemory = long.Parse(mo["TotalPhysicalMemory"].ToString());
        }
      }
    }
    #endregion

    #region CPU個數(shù)
    /// <summary>
    /// 獲取CPU個數(shù)
    /// </summary>
    public int ProcessorCount
    {
      get
      {
        return m_ProcessorCount;
      }
    }
    #endregion

    #region CPU占用率
    /// <summary>
    /// 獲取CPU占用率
    /// </summary>
    public float CpuLoad
    {
      get
      {
        return pcCpuLoad.NextValue();
      }
    }
    #endregion

    #region 可用內(nèi)存
    /// <summary>
    /// 獲取可用內(nèi)存
    /// </summary>
    public long MemoryAvailable
    {
      get
      {
        long availablebytes = 0;
        //ManagementObjectSearcher mos = new ManagementObjectSearcher("SELECT * FROM Win32_PerfRawData_PerfOS_Memory");
        //foreach (ManagementObject mo in mos.Get())
        //{
        //  availablebytes = long.Parse(mo["Availablebytes"].ToString());
        //}
        ManagementClass mos = new ManagementClass("Win32_OperatingSystem");
        foreach (ManagementObject mo in mos.GetInstances())
        {
          if (mo["FreePhysicalMemory"] != null)
          {
            availablebytes = 1024 * long.Parse(mo["FreePhysicalMemory"].ToString());
          }
        }
        return availablebytes;
      }
    }
    #endregion

    #region 物理內(nèi)存
    /// <summary>
    /// 獲取物理內(nèi)存
    /// </summary>
    public long PhysicalMemory
    {
      get
      {
        return m_PhysicalMemory;
      }
    }
    #endregion

    #region 結(jié)束指定進程
    /// <summary>
    /// 結(jié)束指定進程
    /// </summary>
    /// <param name="pid">進程的 Process ID</param>
    public static void EndProcess(int pid)
    {
      try
      {
        Process process = Process.GetProcessById(pid);
        process.Kill();
      }
      catch { }
    }
    #endregion


    #region 查找所有應(yīng)用程序標(biāo)題
    /// <summary>
    /// 查找所有應(yīng)用程序標(biāo)題
    /// </summary>
    /// <returns>應(yīng)用程序標(biāo)題范型</returns>
    public static List<string> FindAllApps(int Handle)
    {
      List<string> Apps = new List<string>();

      int hwCurr;
      hwCurr = GetWindow(Handle, GW_HWNDFIRST);

      while (hwCurr > 0)
      {
        int IsTask = (WS_VISIBLE | WS_BORDER);
        int lngStyle = GetWindowLongA(hwCurr, GWL_STYLE);
        bool TaskWindow = ((lngStyle & IsTask) == IsTask);
        if (TaskWindow)
        {
          int length = GetWindowTextLength(new IntPtr(hwCurr));
          StringBuilder sb = new StringBuilder(2 * length + 1);
          GetWindowText(hwCurr, sb, sb.Capacity);
          string strTitle = sb.ToString();
          if (!string.IsNullOrEmpty(strTitle))
          {
            Apps.Add(strTitle);
          }
        }
        hwCurr = GetWindow(hwCurr, GW_HWNDNEXT);
      }

      return Apps;
    }
    #endregion   
  }
}

然后是執(zhí)行代碼：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Threading;

namespace CSharpPerformance
{//該程序可以實時監(jiān)控程序本身對應(yīng)進程的工作集、私有工作集和CPU使用率
  class Program
  {
    static void Main(string[] args)
    {
      //獲取當(dāng)前進程對象
      Process cur = Process.GetCurrentProcess();

      PerformanceCounter curpcp = new PerformanceCounter("Process", "Working Set - Private", cur.ProcessName);
      PerformanceCounter curpc = new PerformanceCounter("Process", "Working Set", cur.ProcessName);
      PerformanceCounter curtime = new PerformanceCounter("Process", "% Processor Time", cur.ProcessName);

      //上次記錄CPU的時間
      TimeSpan prevCpuTime = TimeSpan.Zero;
      //Sleep的時間間隔
      int interval = 1000;

      PerformanceCounter totalcpu = new PerformanceCounter("Processor", "% Processor Time", "_Total");

      SystemInfo sys = new SystemInfo();
      const int KB_DIV = 1024;
      const int MB_DIV = 1024 * 1024;
      const int GB_DIV = 1024 * 1024 * 1024;
      while (true)
      {
        //第一種方法計算CPU使用率
        //當(dāng)前時間
        TimeSpan curCpuTime = cur.TotalProcessorTime;
        //計算
        double value = (curCpuTime - prevCpuTime).TotalMilliseconds / interval / Environment.ProcessorCount * 100;
        prevCpuTime = curCpuTime;

        Console.WriteLine("{0}:{1} {2:N}KB CPU使用率：{3}", cur.ProcessName, "工作集(進程類)", cur.WorkingSet64 / 1024,value);//這個工作集只是在一開始初始化，后期不變
        Console.WriteLine("{0}:{1} {2:N}KB CPU使用率：{3}", cur.ProcessName, "工作集    ", curpc.NextValue() / 1024,value);//這個工作集是動態(tài)更新的
        //第二種計算CPU使用率的方法
        Console.WriteLine("{0}:{1} {2:N}KB CPU使用率：{3}%", cur.ProcessName, "私有工作集  ", curpcp.NextValue() / 1024,curtime.NextValue()/Environment.ProcessorCount);
        //Thread.Sleep(interval);

        //第一種方法獲取系統(tǒng)CPU使用情況
        Console.Write("\r系統(tǒng)CPU使用率：{0}%", totalcpu.NextValue());
        //Thread.Sleep(interval);

        //第二章方法獲取系統(tǒng)CPU和內(nèi)存使用情況
        Console.Write("\r系統(tǒng)CPU使用率：{0}%，系統(tǒng)內(nèi)存使用大?。簕1}MB({2}GB)", sys.CpuLoad, (sys.PhysicalMemory - sys.MemoryAvailable) / MB_DIV, (sys.PhysicalMemory - sys.MemoryAvailable) / (double)GB_DIV);
        Thread.Sleep(interval);
      }

      Console.ReadLine();
    }
  }
}

以上程序可以正常運行，沒隔1S刷新一次，實現(xiàn)動態(tài)顯示本程序?qū)?yīng)進程的CPU和內(nèi)存使用情況。

原文鏈接：http://www.cnblogs.com/maowang1991/p/3285983.html

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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