Solved

Start timer at next fixed interval

Posted on 2014-12-27
6
140 Views
Last Modified: 2014-12-27
I am using a timer but I don't want it to start until the next exact 10s slot

By this I mean

12/12/2014 16:02:14.000 should start at 12/12/2014 16:02:20.000

Thanks for the help
0
Comment
Question by:SweetingA
  • 3
  • 2
6 Comments
 
LVL 44

Expert Comment

by:AndyAinscow
ID: 40519587
Then you have two timers.  The first just to check for the start time of the second timer and set that going when it is required.
0
 
LVL 3

Expert Comment

by:Ali HND
ID: 40519588
Set timer interval to 100
Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
        Dim s As Integer = DateTime.Now.Second
        If s Mod 10 = 0 Then
            'Something that you need to do
        End If
    End Sub

Open in new window

0
 
LVL 44

Accepted Solution

by:
AndyAinscow earned 500 total points
ID: 40519594
Oh and one other thing.
next exact 10s slot
Timer events are fired when the system is not busy.  You can never guarantee it will be at .000 seconds no matter what you set as the timer interval.
0
DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

 
LVL 3

Expert Comment

by:Ali HND
ID: 40519602
@AndyAinscow
I think, by decreasing interval of timer to 100, 10 or 1 that's possible to do.
0
 
LVL 44

Expert Comment

by:AndyAinscow
ID: 40519608
>>I think, by decreasing interval of timer to 100, 10 or 1 that's possible to do.

Sorry but that is not correct.  Various services run, numbers of programs run.  Each are given a time slice.  You can never be certain that time slice will be cover eg. 16:02:20.000
The time slice might start at 16:02:20.001 or it might finish at 16:02:19.999 or even further away OR, by chance, it might be at 16:02:20.000.
0
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 40519731
Instead of two timers, I like to calculate the milliseconds to the next target time like this:
Public Class Form1

	Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
		Timer1.Interval = IntervalToNextTarget()
		Timer1.Start()
	End Sub

	Private Function IntervalToNextTarget() As Integer
		Dim now As DateTime = DateTime.Now
		Return CInt(now.AddSeconds(10 - (now.Second Mod 10)).Subtract(now).TotalMilliseconds)
	End Function

	Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
		' ... do something ...
		Debug.Print(DateTime.Now)

		Timer1.Interval = IntervalToNextTarget()
	End Sub

End Class

Open in new window

0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This script will sweep a range of IP addresses (class c only, 255.255.255.0) and report to a log the version of office installed. What it does: 1.)      Creates log file in the directory the script is run from (if it doesn't already exist) 2.)      Sweep…
More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…
Hi friends,  in this video  I'll show you how new windows 10 user can learn the using of windows 10. Thank you.

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now