If the time is 1:00am Run the function in C#?

Question

Is there a way in C# where if the time in PC or system says 1:00AM the function will run. I know this can be achieved using timer, but how can I do it? The code I am tinkering right now is this:

var t = new Timer { Enabled = true, Interval = 1 * 1000 };
        t.Tick += delegate { mem_details(); };

But this code runs the function every 1 seconds, Do I need to compute 1:00AM to Seconds so I can do it using this code?

Answer 1

Since you're using a 1 second timer why not check the time every tick?

EDIT:

Ok I changed my code a bit. It's still a 1 second timer (1000 milliseconds) but now when the timer tick event triggers, it only looks at the current hour and minute. Thus if your program is running a bit slow it will still run your process at 1 AM.

The global variable "lastRunDate" stores the date of when the last process run. This needs to be updated before your process runs just in case your process takes longer than a second to complete.

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        private String lastRunDate = "";

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            timer1.Interval = 1000;
            timer1.Enabled = true;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (lastRunDate != System.DateTime.Now.ToString("yyyy-MM-dd"))
            {
                String str = System.DateTime.Now.ToString("h:mm tt");

                if (str.Equals("1:00 AM"))
                {
                    lastRunDate = System.DateTime.Now.ToString("yyyy-MM-dd");
                    MessageBox.Show(str);                    
                }
            }
        }
    }
}

Answer 2

Please have a look to Quartz scheduler, I suppose it will help http://quartz-scheduler.org/

Here is an example of how to configure Quartz for different time using cron strings:http://quartz-scheduler.org/documentation/quartz-2.2.x/examples/Example3.

You can use the online cron generator to select time you need.

Answer 3

You could always go with Microsoft's Reactive Framework to do this. The schedulers in there are incredibly robust.

You could write this code:

var start = DateTimeOffset.Now;
start = start.Date.AddHours(start.Hour == 0 ? 1.0 : 25.0);
/* start is now set for the next 1AM */

/* So schedule it */
Scheduler.Default.Schedule(start, reschedule =>
{
    /* Do you thing as it's now 1AM */

    /* And now reschedule to run tomorrow at 1AM */
    reschedule(DateTimeOffset.Now.Date.AddHours(25.0));
});

Answer 4

You can use timer and check time in it. For example

var t = new Timer { Enabled = true, Interval = 1 * 1000 }; t.Tick += delegate (object sender, EventArgs e) { if (DateTime.Now.TimeOfDay.TotalHours > 1 && DateTime.Now.TimeOfDay.TotalHours < 2) { mem_details(); (sender as Timer).Enabled=false; } };