How do I stop a timer in its own timer tick? This is the code so far:
Private Sub replyTimer_Tick(sender As Object, e As EventArgs) Handles replyTimer.Tick
MsgBox("Hello!")
Me.replyTimer.Stop()
End Sub
But for some reason, it doesn't stop.
First of all:
The enabled property for the timer must be "False", so the timer doesn't start when form loaded.
and you have to make sure that: in the other parts of your code there is no command or loop to restart the timer.
and to stop the timer... you just need this code :
Private Sub replyTimer_Tick(sender As Object, e As EventArgs) Handles replyTimer.Tick
replyTimer.Stop()
MsgBox("Hello!")
End Sub
so every time the timer starts : the message will pop, and the timer will not restart.
To start the timer again write:
replytimer.start()
i hope my answer was useful to you :)
Related
I'm new to the programming world.
I'm trying to make a simple software which will go through 5-6 forms (showing the progress bar as a picture) and on each form display progress as a picture while some other code is being run in the background. I've written my code and it just keeps looping the application for some reason and I don't know how to stop it from looping.
As I said, I'm new to visual basic and programming world, so please just go easy on me, thanks!
I just need help with stopping the timer after the HandleTimerTick() happens. I don't know how to call the timer to stop, from the previous sub or something. So, I just need a command to stop t.Tick once HandleTimerTick from the second sub starts.
If you have any simpler command to stop the code from executing for the number of seconds feel free to share. Thanks in advance!
Private Sub Delay1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim t As Timer = New Timer()
t.Interval = 2000
AddHandler t.Tick, AddressOf HandleTimerTick
t.Start()
End Sub
Private Sub HandleTimerTick()
Dim SecondForm As New Delay2
SecondForm.Show()
Me.Close()
End Sub
Use the proper signature for the Event handler In this way you get a reference to the Timer that trigger the event handler and you can stop it
Private Sub HandleTimerTick(sender As Object, e As EventArgs)
... your code to handle the event
' Stop the timer
Dim t As System.Windows.Forms.Timer
t = DirectCast(sender, System.Windows.Forms.Timer)
t.Stop
End Sub
I have used three timers in my program. All are working fine except the third one. i don't know why?
Private Sub Timer3_Tick(sender As Object, e As EventArgs) Handles Timer3.Tick
MessageBox.Show("dont repeat please")
Timer3.Stop()
End Sub
In the form_load i had started the timer, but its showing message box again and again at the interval of 3000ms which i have set. Please help.
Unless there is more to it a quick solution is to just move the call stop the timer to before the message box.
Private Sub Timer3_Tick(sender As Object, e As EventArgs) Handles Timer3.Tick
Timer3.Stop()
MessageBox.Show("dont repeat please")
End Sub
Basically the processing of the code in the Timer3_Ticket sub is being blocked by the display of the message box. The timer running on another thread will continue to raise tick events at each time interval until a message box is closed and the stop method is called.
I'm working with visual basic express 2010 to create a very simple application.
I know this is basic stuff but i need to know how to repeat the same function every X minute while the application is being left open.
This is all my code:
Public Class Form1
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
My.Computer.Network.DownloadFile(
"http://google.co.uk/images/someimage.png", "C:/Documents and Settings/All Users/Desktop/someimage.png")
End Sub
End Class
could someone please advise on this issue?
EDIT:
This is my entire code now:
Public Class Form1
Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
My.Computer.Network.DownloadFile(
"http://new.tse.ir/en/json/MarketWatch/enMarketWatch_1.xls", "C:/temp/enMarketWatch_1.xls", "", "", False, 60, True)
End Sub
End Class
in the properties panel of the timer, I set the Enabled to true and Interval to 60000.
when i run this code, I get file downloaded but 1 second later, the file gets deleted automatically and an error pops up in the visual basic saying the operation has timed out
I tried to change the directory and still happening.
any advise would be appreciated.
Add a timer to your form in the graphical designer.
Double click the timer to generate its tick event handler code in the code window.
Move the code you want to repeat into a sub
Private Sub DownloadFile()
My.Computer.Network.DownloadFile("http://google.co.uk/images/someimage.png", "C:/Documents and Settings/All Users/Desktop/someimage.png")
End Sub
Add the command below into your timer tick event handler
DownloadFile()
Change your form.load event to
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
DownloadFile()
Timer1.Interval = x ' where x is the number of minutes*60000 because there are 60000 ticks in a minute
Timer1.Enabled = True
End Sub
The reason I've put your code into a separate sub is so that it is easily reusable in both the form.load handler and the timer.tick handler without having to write it again, and if in the future you need to change, for example the file path, you only need to remember to change it once.
Also I should add that, in the form.load handler I have included the DownloadFile method because, when the timer is enabled, it won't generate a tick until the interval has elapsed. Not at the beginning when the timer is enabled.
Also - as Plutonix suggested in comments below - If it is possible that the file to be downloaded will take longer to download than the length of the timer interval you should disable the timer in the DownloadFile sub and enable it again at the end of the sub. Like so :-
Private Sub DownloadFile()
Timer1.Enabled = False
My.Computer.Network.DownloadFile("http://google.co.uk/images/someimage.png", "C:/Documents and Settings/All Users/Desktop/someimage.png")
Timer1.Enabled = True
End Sub
I have a vb.net winform and I want to know how to add sort of like a session time out to it. For example, I have a varialbe set to 10 min, within that 10 min, if there is no activity (no mouse/no keyboard interaction), I would like to log the user out. Can anyone shine some light on this subject on how to make this work?
First question, why do you want to do in a winform. Such things we generally use in web forms. But even you want to use such things in WinForms you need to use Timer Class.
Whenever you encounter activity, you can just reset the timer by calling Stop then immediately calling Start. Place whatever code you'd like in the Timer's Tick event (assuming this is a System.Windows.Forms.Timer) and you'll be all set.
I'd suggest you use the event Application.Idle.
No need to P/Invoke.
Public Class Form1
Private WithEvents _timer As Timer
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
' 10 seconds for testing
Me._timer = New Timer With {.Interval = 10000, .Enabled = True}
AddHandler Application.Idle, AddressOf Me.Application_Idle
End Sub
Private Sub Application_Idle(sender As Object, e As EventArgs)
Me._timer.Stop()
Me._timer.Start()
End Sub
Private Sub Timer_Tick(sender As Object, e As EventArgs) Handles _timer.Tick
Me._timer.Stop()
RemoveHandler Application.Idle, AddressOf Me.Application_Idle
' Do something to log the user out
Me.Close()
End Sub
End Class
If you are looking for a way to detect input outside your application Amit's suggestion will not work.
See Detecting idle users in Winforms if that is the case. Calling GetLastInputInfo() and checking the last input value should give you something to go off.
If you are not worried about the user leaving your application, and getting logged out after not using it, use Amit's way of resetting a timer on the input event.
Can i set time limit for a task or a code? for example if i want to show message boxes for 10 seconds and then stop or change the the message body ?
Yes, check out timers. There are three different kinds of timers:
System.Timers.Timer
System.Threading.Timer
System.Windows.Forms.Timer
Which one will work best for you will depend entirely on your specific situation. Given the limited information you provided, I suspect that the easiest way to do what you need to do is to create your own message-box-like form and place a System.Windows.Forms.Timer component on the form (you can find it in the form designer's tool box). Have the form start the timer in its own Shown event. And then show the form using the ShowDialog method.
You can start a Thread and abort it when you want:
Dim t1 As New Threading.Thread(AddressOf MyMethod)
t1.Start()
Timer1.Start()
Private Sub MyMethod()
' Do what you want
End Sub
Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
Timer1.Enabled = False
t1.Abort()
End Sub