"Yet Another One" <m*@here.com> schreef in bericht
news:45qk339e4092sguegt1gvdi01t9rrmms8l@4ax.com...
> Sorry if this has been answered before, but I simply cannot find the
> solution on my own.
>
> I am looking to do a countdown in my application. Basically, I need to
> count down from 5:59 (5 minutes, 59 seconds) and then perform a task.
> Performing the task is easy enough, but the countdown is just slipping
> past me.
>
> Anyone have any idea how I can best achieve this?
>
> Thanks in advance and sorry for wasting your time. I am quite new to
> this and trying to learn as much as I can on my own.
>
>
> Ryan

"Yet Another One" <m*@here.com> wrote in message
news:km7m33td5m8tuj7qhne1ubbqf6tonijbvc@4ax.com...
> On Fri, 4 May 2007 03:18:06 +0200, "Cor Ligthert [MVP]"
> <notmyfirstn***@planet.nl> staggered into the room, obviously drunk,
> and said:
>
>>Hi,
>>
>>To be more precise in the answer from Iwdu15
>>
>>Use the forms timer and don't forget to reset it everytime inside its
>>event
>>otherwise you can get the craziest results.
>>
>>http://msdn2.microsoft.com/en-us/library/system.windows.forms.timer(VS.80).aspx
>>
>>I hope this helps,
>>
>>Cor
>>
>
> Thanks for the replies.
>
> I understand that I have to use a timer to do this (I should have been
> more clear, sorry), but my problem is that I don't know HOW to count
> down minutes like that.
>
> For instance; How do I subtract 1 from the minutes when the seconds
> reach zero and then reset the seconds to 59? I simply cannot figure
> this out, hehe. As I said, I am new to this and trying to learn on my
> own. Probably a bad idea, yes, but reading the help has only gotten me
> so far with counting down the way I need to.
>
> This project isn't anything important. It's just me trying to learn
> some stuff about visual basic is all.
>
> Thanks again,
>
> Ryan

"Yet Another One" <m*@here.com> wrote...
> On Fri, 4 May 2007 10:33:12 -0700, "Mythran" <kip_pot***@hotmail.com>
> staggered into the room, obviously drunk, and said:
>>
>>One way to do it is to use a member variable in the class or form you are
>>working with.  You would initially set this var to 359 (in seconds) and
>>subtract one every tic from the timer control event.  When it reaches 0,
>>the
>>5 minutes 59 seconds has elapsed and you can call your function that does
>>the operation you want.  Once done, you'd probably want to reset the var
>>back to 359 and start the timer again...
>>
>>Mythran
>>
>
> Thanks for the ideas, I really appreciate it.
>
> Here is what I have so far... please be gentle and don't laugh, I am
> still new to this. :)
>
>    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles Timer1.Tick
>
>        Seconds = Seconds - 1
>        If Seconds = 0 Then
>            Minutes = Minutes - 1
>            Seconds = 59
>        Else
>            If Minutes = 0 And Seconds <= 11 Then
>                Minutes = Minutes
>            Else
>                Minutes = 5
>            End If
>        End If
>
>        ....
>
>    End Sub
>
> This seems to count down the way I want but with one problem... when
> it never gets to 0:00, it always goes to -5:59 and THEN back to 5:59.
>
> Can anyone help me clean this up a little? Basically, I need it to do
> this:
>
> Label text would equal 5:59... 5:58... 5:57... etc, counting down to
> 0:00 and then resetting to 5:59 without showing negative numbers.
>
> All the help so far has been appreciated very much. It's given me
> ideas and they seem to be somewhat working, but not exactly as
> desired.
>
> Thanks!
>
> Ryan

>I'm not going to be able to write the code (unless you can wait a week) but
>let me give you an alternative.  First you probably do not want to set a
>timer using it to count the clicks.  You _do_ want to use a timer but rather
>than count clicks you just use the timer to give you an opportunity to check
>the clock.
>
>Let's say you need to set the timer for 5 minutes from now.  Set the "target
>time" to the current time plus 5 minutes.  When the click event occurs you
>can display the differerence between the target time and the current time.
>That difference gets smaller as the real time approaches the target time.
>At one point your timer event fires and the difference will be zero or
>possibly a fraction of a second negative.  If you compute the Max() of the
>difference and zero you will never go negative.  And when the difference is
>zero you run whatever process you wanted.  To reset the the "timer" you
>simply reset the target time to another point in the future.
>
>The actual time is the thing that adjusts (it is adjusting automatically
>because the computer has a clock) and all you need is a non-incrementing
>"static" value representing the target time.  There is no need to increment
>or update anything on each event.
>
>Keep in mind that you'll need date/time math (or use a value that takes the
>date into consideration) in case it is (say) 3 minutes before midnight and
>you set the target time 5 minutes ahead.  If you don't notice the date
>changed your time won't match until some 23 hours and 55 minutes later.
>
>Does this make any sense?
>Tom

>Hi,
>
>Maybe you could try approaching the problem from this angle.
>
>Dim t As New DateTime()
>    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As
>System.EventArgs) Handles MyBase.Load
>        Me.Timer1.Enabled = True
>        t = t.AddMinutes(359)
>        Label1.Text = t.ToShortTimeString
>    End Sub
>
>    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As
>System.EventArgs) Handles Timer1.Tick
>        t = t.AddMinutes(-1)
>        Label1.Text = t.ToShortTimeString
>        If t.Ticks = 0 Then
>            t = t.AddMinutes(359)
>            Label1.Text = t.ToShortTimeString
>        End If
>    End Sub
>
>This isn't a complete solution depending on what you are after, because it
>isn't guaranteed to be an exact timed countdown, but I hope it helps.
>
>Kind regards,
>
>Martin.
>