using System;
using System.ComponentModel;
using System.Windows.Forms;
using System.Diagnostics;
using System.Threading;namespace PerformanceCounterApp
{public partial class MainForm : Form{private BackgroundWorker backgroundWorker;private bool isWorking = false;public MainForm(){InitializeComponent();}private void Form_Load(object sender, EventArgs e){cpuLabel.Text = string.Empty;diskLabel.Text = string.Empty;backgroundWorker = new BackgroundWorker();backgroundWorker.WorkerReportsProgress = true;backgroundWorker.WorkerSupportsCancellation = true;backgroundWorker.DoWork += BackgroundWorker_DoWork;backgroundWorker.ProgressChanged += BackgroundWorker_ProgressChanged;backgroundWorker.RunWorkerCompleted += BackgroundWorker_RunWorkerCompleted;}private void BackgroundWorker_DoWork(object sender, DoWorkEventArgs e){//PerformanceCounter diskp = new PerformanceCounter("PhysicalDisk", "% Disk Time", "_Total");isWorking = true;backgroundWorker.ReportProgress(0, "Loading.../");PerformanceCounter cpup = new PerformanceCounter("Processor", "% Processor Time", "_Total");PerformanceCounter diskp = new PerformanceCounter("PhysicalDisk", "Disk Read Bytes/sec", "_Total");try{do{Thread.Sleep(150);var cpuv1 = (int)cpup.NextValue();var diskv1 = (int)diskp.NextValue();Thread.Sleep(150);var cpuv2 = (int)cpup.NextValue();var diskv2 = (int)diskp.NextValue();Thread.Sleep(150);var cpuv3 = (int)cpup.NextValue();var diskv3 = (int)diskp.NextValue();Thread.Sleep(150);var cpuv4 = (int)cpup.NextValue();var diskv4 = (int)diskp.NextValue();var cpuv = (cpuv1 + cpuv2 + cpuv3 + cpuv4) / 4;var diskv = (diskv1 + diskv2+ diskv3 + diskv4) / 4;string data = $"{cpuv}%/{diskv}";backgroundWorker.ReportProgress(0,data);} while (!backgroundWorker.CancellationPending);}catch (Exception){throw;}finally{cpup.Dispose();diskp.Dispose();isWorking = false;}}private void BackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e){string[] data = e.UserState.ToString().Split('/');cpuLabel.Text = $"CPU: {data[0]}";diskLabel.Text = $"Disk: {data[1]} Bytes/sec";}private void BackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e){var result = e.Result;var cc = e.Cancelled;}private void startButton_Click(object sender, EventArgs e){if (backgroundWorker.CancellationPending) return;if (isWorking){startButton.Text = "Start";backgroundWorker.CancelAsync();}else{startButton.Text = "Stop";backgroundWorker.RunWorkerAsync();} }private void Form_Closed(object sender, FormClosedEventArgs e){if (isWorking){startButton.Enabled = false;backgroundWorker.CancelAsync();}}}
}