Stopwatch C#

Using Stopwatch in C#

Stopwatch (Sekundamer) – o’tgan vaqtni o’lchash uhcun ishlatiladi. Odatda kodni test qilish, optimallashtirish uchun qulay.

Stopwatch sinfi  System.Diagnostics namespaseda joylashgan uning daraxtsimon ko’rinishi quyidagicha:

 

 

Stopwatch sinfida quyidagi “xususiyat”(properties)lar aniqlangan:

-          Elapsed  - Umumiy ketgan vaqtni qaytaradi (Hours, Minutes, Seconds, Milliseconds, Days kapi maydonlar mavjud)

-          ElapsedMilliseconds – Umimiy ketgan vaqtni Millisecondda qaytaradi

-          ElapsedTicks – Umimiy ketgan vaqtni timer bo’yicha qaytaradi

-          IsRunning – Stopwatch timeri start bo’lgan bo’lsa ‘true’, aks holda ‘false’ qiymat qaytaradi

Stopwatch sinfida quyidagi metodlar aniqlangan:

Start – Stopwatchni yuklash yoki davom qilidirish uchun ishlatiladi

Stop – Stopwatchni to’xtatish uchun ishlatiladi

Restart – Stopwatch ob’ektni qiymatlarni nolga tenglashtiradi va qaytib ‘start’ qiladi

Reset  - Stopwatch ob’ekti qiymatlarini nolga deb oladi

Maslan:

1)      N! ni hisoblash

using System;

using System.Diagnostics;

using System.Threading;

namespace ConsoleApplicationStopWatchTest1

{

    class Program

    {

        static long fact(int n)

        {

            Thread.Sleep(100);//100 millisekund kutish

            if (n==0)

            return 1;

            else

            {

                return n*fact(n - 1);

            }

        }

        static void Main(string[] args)

        {

            Console.WriteLine("Stopwatch C#:");

            Stopwatch timer=new Stopwatch();

            //N!=1*2*...*N ni hisoblash

            Console.Write("> N=");

            int n=int.Parse(Console.ReadLine());

            long result = 0;

            timer.Start();

            result = fact(n);

            timer.Stop();

            Console.WriteLine("------------- Natija -------------------");

            Console.WriteLine("{0}! = {1}",n,result);

            Console.WriteLine("Hisoblash uchun ketgan vaqt:{0} soat, {1} min, {2} sek, {3}"+

                " milli sek vaqt ketdi!",timer.Elapsed.Hours,

                timer.Elapsed.Minutes,timer.Elapsed.Seconds,timer.Elapsed.Milliseconds);

            Console.ReadLine();

        }

    }

}

Natija:

2) C# Windows Forms Application yordamida “SEKUNDAMER” desturini yaratish

“Sekundamer” dasturini WindowsFormsApp da yaratish uchun shu tipdagi yangi proyekt yaratamiz, va undagi Form1 formasini quyidagi ko’rinishda quramiz:

 

“Boshlash” tugmasini – btnStart, “Stop” tugmasini – btnStop, “Reset qilish” tugmasini btnReset,

Labellarni esa mos ravishda lblStopWatchFullValue va lblStopWatchInMilliSeconds deb nomlaymiz.

Bizga “Timer” komponenti kerak bo’ladi, uni C# standart komponentlari ichidan (odatda “Components” bo’limida joylashadi) o’rnatamiz.

Form1.cs sinfi kodi quyidagicha bo’ladi:

using System;

using System.Diagnostics;

using System.Windows.Forms;

namespace WindowsFormsApplicationStopWatchTest1

{

    public partial class Form1 : Form

    {

        private Stopwatch sw;

        public Form1()

        {

            InitializeComponent();

            sw=new Stopwatch();

        }

        private void btnStart_Click(object sender, EventArgs e)

        {

            sw.Start();

            timer1.Start();

        }

        private void btnStop_Click(object sender, EventArgs e)

        {

            sw.Stop();timer1.Stop();

        }

        private void btnReset_Click(object sender, EventArgs e)

        {

            sw.Reset();

            lblStopWatchFullValue.Text = "00:00:00:00";

            lblStopWatchInMilliSeconds.Text = "0 Millisekund";

        }

        private void timer1_Tick(object sender, EventArgs e)

        {

            lblStopWatchFullValue.Text = string.Format("{0}:{1}:{2}:{3}", sw.Elapsed.Hours, sw.Elapsed.Minutes, sw.Elapsed.Seconds,

                sw.Elapsed.Milliseconds);

            lblStopWatchInMilliSeconds.Text = string.Format("{0} Millisekund", sw.ElapsedMilliseconds);

        }

    }

}

Dasturni ishga tushirib, “Boshlash" tugmasini bosganda quyidagi natijani olishimiz mumkin:

Stopwatch dan net dasturlashda(socketlar bilan ishlaganda), DB ga yuborilayatgan query(zopros)larning bajarilishi uchun ketgan vaqtni aniqlashda foydalanish mumkin

Masalan quyidagi rasmda “DataWhare House” ga bo’layotgan zaproslar va ularning bajarilishi uchun ketgan vaqtni service orqali monitoring qilish jarayoni qisman ko’rsatilgan. Ushbu jarayonda Thread va Stopwatchdan foydalanish mumkin.

 

 

Useful LINKS:

• http://msdn.microsoft.com/ru-ru/library/system.diagnostics.stopwatch(v=vs.110).aspx
• http://tipsandtricks.runicsoft.com/CSharp/PerformanceMeasuring.html
• http://www.dotnetfunda.com/articles/show/907/stopwatch-application-using-csharp