Inserting a delay

Question

I want to create a delay of X seconds in some code I have written however I am not sure how to do it. Any help would be appreciated.

eg.
CheckTemperature()
delay
CheckTemperature()
delay
CheckTemperature()
delay
CheckTemperature()

Answer 1

CheckTemperature()
Thread.Sleep(1000) '1000 milliseconds
CheckTemperature()
Thread.Sleep(1000) '1000 milliseconds
CheckTemperature()
Thread.Sleep(1000) '1000 milliseconds
CheckTemperature()

---

Thanks,
A.m.a.L

.Net Goodies
[Remember to click "mark as answered" when you get a correct reply to your question]

Answer 2

I want to create a delay of X seconds in some code I have written however I am not sure how to do it. Any help would be appreciated.

eg.
CheckTemperature()
delay
CheckTemperature()
delay
CheckTemperature()
delay
CheckTemperature()

You can also add a timer and use its tick even to execute a set of statements in specified time interval.

---

Thanks,
A.m.a.L

.Net Goodies
[Remember to click "mark as answered" when you get a correct reply to your question]

Answer 3

Using the timer would be preferable to using Thread.Sleep as it will leave your GUI responsive which Thread.Sleep will not.

    Dim WithEvents Tmr As New Timer
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Tmr.Interval = 1000
        Tmr.Start()
    End Sub
    Private Sub Tmr_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Tmr.Tick
        CheckTemperature()
    End Sub

Answer 4

I asked this question earlier but I did not ask the right thing.

I need to put a delay into my application where after Function A runs I need to run Function B a variable number of seconds later.

e.g. Function A - turn on switch ..... wait some time ..... Function B - check if the result has been achieved

The application will not require any user input during this delay if that makes a difference. I tried using the timer option but had trouble getting a good grasp of it and I only want it to perform Function B once and I was having trouble with that as it would repeat every interval.

Answer 5

Dim WithEvents myTimer As New Timer
    
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        myTimer.Interval = 2000 '2 seconds
        sub1()
End Sub
 
Private Sub sub1()
        'work
        'work
        'work
        myTimer.Enabled = True
End Sub
    
Private Sub sub2()
        MsgBox("hi")
End Sub
    
Private Sub myTick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles myTimer.Tick
        myTimer.Enabled = False
        sub2()
End Sub

 

---

Thanks

- Omie

Answer 6

Assuming Function A runs when a button is clicked (or something similar):
At the end of Function A, enable the timer (Timer1.Enabled = True). Set your timer's interval to however many milliseconds you want (5000 milliseconds = 5 secs). In the Timer1.Tick put your code for Function B or a call to Function B, then at the end of this disable the timer (Timer1.Enabled = False).

Answer 7

then at the end of this disable the timer (Timer1.Enabled = False).

If execution of B() lasts for more than interval then next tick is processed, need to stop it before calling B() :-)

---

Thanks

- Omie

Answer 8

Omie, good point
Didn't consider that - can't think of a time where I've had a process take longer than maybe a second. But it is a possibility.
Thanks for the catch

Answer 9

Put a msgbox inside B() and when it pops up, keep it as it is and let it pass interval time :-p

---

Thanks

- Omie

Answer 10

Dave 299,

 I'd like to thank you.  I'm fairly new to programming in Visual Basic.  I'm currently using VB 2008.  I've been racking my brain trying to figure out how to use the Timer class.  The example, and all examples, it seems, that MSDN provides is insanely complicated.  I don't know why they have to make all their examples so complicated.  Your example above made it simple enough for me to get it working.

I'm trying to rotate through characters in a textbox, and incorporating the timer in a class.  I think with your example above, finally I hear one shoe falling.

Answer 11

All righty then, the second shoe has fallen.

There are two types of timer classes.  I wanted to use class Timer in a class.  I tried to use the Tick event, and it didn't recognize it.  Then I noticed that for my object, Intellisense wasn't showing Tick as an option.  Then I went back and read some more from MSDN.  From what I read, the class System.Timers.Timer doesn't have a Tick event, only an Elapsed event.  Then why did Tick work in the form code. 

Form code uses Windows.Form.Timer.

Great.  I obviously have much to learn.