Reputation: 1240
I want to make a simple program to make it run in the specific time. Here is my code:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Alarm ft = new Alarm(dateTimePicker1.Value);
}
}
public class Alarm
{
public Timer reminder = new Timer();
public DateTime RemindAt;
public Alarm(DateTime time)
{
RemindAt = time;
reminder.Interval = (int)(RemindAt - DateTime.Now).TotalMilliseconds;
reminder.Start();
reminder.Tick += new EventHandler(reminder_Tick);
}
void reminder_Tick(object sender, EventArgs e)
{
if (RemindAt <= DateTime.Now)
{
reminder.Dispose();
MessageBox.Show("W: " + RemindAt.ToString("dd MMMM yyyy, HH:mm:ss") + "\n" + "N: " + DateTime.Now.ToString("dd MMMM yyyy, HH:mm:ss") + "\n\n");
}
}
As you can seem I use timers, but it seems pretty inaccurate, I have no idea why. Here is the screenshot of 6 alarms: https://i.sstatic.net/IGzIh.png
Half of them are wrong. W stands for when it should work, N stands for now. The difference can be huge sometimes, why is that? How to fix that, or maybe there is a better way to make a simple alarm?
Upvotes: 1
Views: 3872
Reputation: 1529
Take a Look at Windows Task Schedular
Basically create your EXE and let Windows handle the time to run.
Upvotes: 0
Reputation: 225281
System.Windows.Forms.Timer
s aren't precise, especially for large numbers. Instead of calculating the value for Interval
, set it to something constant, say 1000
.
Upvotes: 1