I want to run my code with specific time everyday

Feroz Khan

3y952C#

Dear All, Please need your support i dovleped one application and there while loop which keep runining and condition there is spcific time like if time reach 13:00 then go to next code its working fine no issue found but only one issue while loop keep runinig and chekcing time for this system process using like 25% and more how can i reduce this and or is there another way to run application with spcific time without consuming system high processing. please advice below code for your refrence.

while (true)
{
    if (System.DateTime.Now.ToString("HH:mm") == "13:15")
    {
        int i;
        for (i = 0; i < 35; i++)
        {
        }
    }
    else
    {  }
}

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Amit Mohanty3y ago

Accepted answer

You can use System.Timers.Timer or System.Threading.Timer to run a specific code block at a specific time without busy-waiting. Here's an example using System.Timers.Timer:

using System;
using System.Timers;

class Program
{
    private static Timer timer;

    static void Main(string[] args)
    {
        // Set the desired time to trigger the event (13:15)
        DateTime targetTime = DateTime.Today.AddHours(13).AddMinutes(15);

        // Calculate the time difference between now and the target time
        double interval = (targetTime - DateTime.Now).TotalMilliseconds;

        // If the target time has already passed today, schedule it for the next day
        if (interval < 0)
        {
            targetTime = targetTime.AddDays(1);
            interval = (targetTime - DateTime.Now).TotalMilliseconds;
        }

        // Create a timer that will trigger the event at the target time
        timer = new Timer(interval);
        timer.Elapsed += Timer_Elapsed;
        timer.Start();

        // Keep the application running
        Console.WriteLine("Application is running. Press any key to exit.");
        Console.ReadKey();

        // Clean up resources when the application exits
        timer.Stop();
        timer.Dispose();
    }

    private static void Timer_Elapsed(object sender, ElapsedEventArgs e)
    {
        // Perform the task you want to execute at 13:15 here
        Console.WriteLine("Task executed at 13:15.");
        // You can add your code here instead of the dummy for loop
    }
}

Deepak Rawat3y ago

Timer class in C#. can perform this task:

using System;
using System.Threading;

public class MyScheduler
{
    private Timer timer;
    
    public MyScheduler()
    {
        // Set the target time for the action (e.g., 13:15)
        DateTime targetTime = DateTime.Today.AddHours(13).AddMinutes(15);
        
        // Calculate the time remaining until the target time
        int dueTime = (int)targetTime.Subtract(DateTime.Now).TotalMilliseconds;
        if (dueTime < 0)
        {
            // If the target time has already passed for today, schedule it for tomorrow
            dueTime += 24 * 60 * 60 * 1000;
        }
        
        // Set up the timer to execute the desired action when the target time is reached
        timer = new Timer(DoAction, null, dueTime, Timeout.Infinite);
    }
    
    private void DoAction(object state)
    {
        // Your code to execute when the target time is reached (e.g., 13:15)
        int i;
        for (i = 0; i < 35; i++)
        {
            // Your logic here
        }
        
        // Reschedule the timer for the next occurrence (e.g., 24 hours later)
        timer.Change(24 * 60 * 60 * 1000, Timeout.Infinite);
    }
}

Muhammad Imran Ansari3y ago

You can achive this through timer class. Here is the code example:

static void Main()
{
	// Define the time you want the code to run every day
	int targetHour = 15; // 3:00 PM
	int targetMinute = 30; // 3:30 PM

	// Calculate the time difference from now to the target time
	TimeSpan timeUntilTarget = CalculateTimeUntilTarget(targetHour, targetMinute);

	// Schedule the code to run at the target time every day
	Timer timer = new Timer(ExecuteCode, null, timeUntilTarget, TimeSpan.FromDays(1));

	// Keep the program running until manually terminated
	Console.WriteLine("Code scheduled to run every day at {0}:{1}", targetHour, targetMinute);
	Console.WriteLine("Press any key to exit...");
	Console.ReadKey();
}

static TimeSpan CalculateTimeUntilTarget(int targetHour, int targetMinute)
{
	DateTime now = DateTime.Now;
	DateTime targetTime = new DateTime(now.Year, now.Month, now.Day, targetHour, targetMinute, 0);

	if (targetTime < now)
	{
		targetTime = targetTime.AddDays(1);
	}

	return targetTime - now;
}

static void ExecuteCode(object state)
{
	// Place your code here that you want to execute at the specified time every day
	Console.WriteLine("Code executed at: " + DateTime.Now);
}