QuirkSys Monitor

Source Code:

//System Resource Monitor

//Developed by: Nicholas Quirk

//Written in: C#

using System;

using System.Management;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Diagnostics;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace WindowsFormsApp1

{

    public partial class Form1 : Form

    {

        //Setting counters

        PerformanceCounter cpuCounter;

        PerformanceCounter ramCounter;

        PerformanceCounter ramCounterTotal; //debugging RAM issue

        public Form1()

        {

            InitializeComponent();

            //Changing the window title

            this.Text = "QuirkSys Monitor";

            //Assigning performance counters

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

            ramCounter = new PerformanceCounter("Memory", "Available MBytes");

            ramCounterTotal = new PerformanceCounter("Memory", "Committed Bytes");

            // Prime the CPU counter

            cpuCounter.NextValue();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            //Start the application timer

            timer1.Start(); 

        }

        private void timer1_Tick(object sender, EventArgs e)

        {

            float cpuUsage = cpuCounter.NextValue();

            float availableRAM_MB = ramCounter.NextValue(); // in MB

            float committedRAM_Bytes = ramCounterTotal.NextValue();

            //Convert committed RAM from bytes to MB

            float committedRAM_MB = committedRAM_Bytes / (1024f * 1024f);

            float totalRAM_Bytes = GetTotalPhysicalMemory(); // in bytes

            float totalRAM_MB = totalRAM_Bytes / (1024f * 1024f); //Converts bytes to MB

            float usedRAM_MB = totalRAM_MB - availableRAM_MB; //Calculate used RAM as total available

            //Convert to GB

            float usedRAM_GB = usedRAM_MB / 1024f;

            float totalRAM_GB = totalRAM_MB / 1024f;

            float pageFileUsage_MB = GetPageFileUsage();

            float pageFileUsage_GB = pageFileUsage_MB / 1024f;

            //debugging line to check if the timer tick event is firing

            //MessageBox.Show("Timer ticked! Updating values.");

            lblCPU.Text = $"🖥️ CPU Usage: {cpuUsage:F1}%";

            lblRAM.Text = $"🧠 RAM Used: {usedRAM_GB:F2} GB / {totalRAM_GB:F2} GB";

            lblSwap.Text = $"💽 PageFile/Swap Used: {pageFileUsage_GB:F2} GB";

        }

        private float GetTotalPhysicalMemory()

        { 

            float total = 0;

            var searcher = new ManagementObjectSearcher("SELECT TotalPhysicalMemory FROM Win32_ComputerSystem");

            foreach (ManagementObject obj in searcher.Get())

            {

                total = Convert.ToSingle(obj["TotalPhysicalMemory"]);

            }

            return total;

        }

        private float GetPageFileUsage()

        {

            float usage = 0;

            var searcher = new ManagementObjectSearcher("SELECT CurrentUsage FROM Win32_PageFileUsage");

            foreach (ManagementObject obj in searcher.Get())

            {

                usage += Convert.ToSingle(obj["CurrentUsage"]);

            }

            return usage; // in MB

        }

        private void lblCPU_Click(object sender, EventArgs e)

        {

        }

        private void textBox1_TextChanged(object sender, EventArgs e)

        {

        }

        private void label2_Click(object sender, EventArgs e)

        {

        }

        private void button1_Click(object sender, EventArgs e)

        {

            //

        }

            private void btnPinOnTop_Click(object sender, EventArgs e)

        {

            this.TopMost = !this.TopMost;

            btnPinOnTop.Text = this.TopMost ? "Unpin" : "Pin on Top";

        }

    }

}