c# 获取某个进程的CPU使用百分百（类似任务管理器中显示CPU）-白红宇

using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Linq;

using System.Management;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

namespace 进程监控

{

class Program

{

static void Main(string[] args)

{

Process[] processes = Process.GetProcessesByName("taskmgr");

foreach (Process instance in processes)

{

Console.WriteLine("");

Console.WriteLine("ProcessName:" + instance.ProcessName);

try

{

//Console.WriteLine("提交大小\t" + instance.PagedMemorySize64 / 1024);

Console.WriteLine("工作设置(内存)\t" + instance.WorkingSet64 / 1024);

Console.WriteLine("线程数\t" + instance.Threads.Count);

Console.WriteLine("句柄数\t" + instance.HandleCount);

}

catch { }

}

Process p = processes[1];

//PerformanceCounter ramCounter = new PerformanceCounter("Process", "Working Set", p.ProcessName);

//PerformanceCounter cpuCounter = new PerformanceCounter("Process", "% Processor Time", p.ProcessName);

var objQuery = new ObjectQuery("select * from Win32_Process WHERE ProcessID = " + p.Id);

var moSearcher = new ManagementObjectSearcher(objQuery);

DateTime firstSample = DateTime.MinValue, secondSample = DateTime.MinValue;

double ProcessorUsage;

double msPassed;

ulong u_OldCPU = 0;

while (true)

{

var gets = moSearcher.Get();

foreach (ManagementObject mObj in gets)

{

try

{

if (firstSample == DateTime.MinValue)

{

firstSample = DateTime.Now;

mObj.Get();

u_OldCPU = (ulong)mObj["UserModeTime"] + (ulong)mObj["KernelModeTime"];

}

else

{

secondSample = DateTime.Now;

mObj.Get();

ulong u_newCPU = (ulong)mObj["UserModeTime"] + (ulong)mObj["KernelModeTime"];

msPassed = (secondSample - firstSample).TotalMilliseconds;

ProcessorUsage = (u_newCPU - u_OldCPU) / (msPassed * 100.0 * Environment.ProcessorCount);

u_OldCPU = u_newCPU;

firstSample = secondSample;

Console.WriteLine("ProcessorUsage:" + (int)ProcessorUsage);

}

catch (Exception ex)

{

Console.WriteLine(ex.Message + ex.StackTrace);

Console.WriteLine(ex.InnerException.Message);

}

Thread.Sleep(1000);

}

Console.ReadLine();

}

本文转自94cool博客园博客，原文链接：http://www.cnblogs.com/94cool/p/6336593.html，如需转载请自行联系原作者