CODEWITHSUNDEEP
powershell
Erez
Erez

Reputation: 6446

Powershell - what is wrong with my countdown timer

I have a script of counter that expects two parameters:

1) seconds to wait before the counter starts.

2) counter duration in seconds.

For example, if I input 3,10 I would like that after 3 seconds the timer will countdown from 10 to 0 and write it to the output every second.

This is my script:

$timeBeforeStart = $args[0]
$waitSeconds = $args[1]  

$startTime = get-date
$endTime   = $startTime.addSeconds($waitSeconds)
$timeSpan = new-timespan $startTime $endTime
start-sleep -s $timeBeforeStart
while ($timeSpan -gt 0) 
{
    $timeSpan = new-timespan $(get-date) $endTime
    write-host $([string]::Format("`rTime Remaining: {0:d2}:{1:d2}:{2:d2}",
    $timeSpan.hours, $timeSpan.minutes, $timeSpan.seconds)) 
    sleep 1
}

Unfortunately it doesn't work, the sleep seems to work simultaneity with the counter instead of delay the counter.

PS C:\> c:\555.ps1 3 10 
Time Remaining: 00:00:07
Time Remaining: 00:00:05
Time Remaining: 00:00:04
Time Remaining: 00:00:03
Time Remaining: 00:00:02
Time Remaining: 00:00:01
Time Remaining: 00:00:00
Time Remaining: 00:00:00

I've also tried start-sleep -s and the results where the same.

by the way, what is the difference between sleep and "start-sleep -s" ?

Upvotes: 1

Views: 6006

Answers (4)

Carlos Andrade Velazquez Esqui
Carlos Andrade Velazquez Esqui

Reputation: 21

Try this way: 

$timeBeforeStart = 0
$waitSeconds = 60

Start-Sleep -Seconds $timeBeforeStart

$waitSeconds..0 | Foreach-Object {
    Write-Host "`r          Time Remaining: $_ " -NoNewline -foregroundcolor green
    Start-Sleep -Seconds 1
}

Upvotes: 2

NZ Anon
NZ Anon

Reputation: 1

This also does the same thing:

$timeBeforeStart = 3
$waitSeconds = 10

Start-Sleep -Seconds $timeBeforeStart
$endTime = (get-date).addSeconds($waitSeconds)

while ( (get-date) -lt $endTime )
    {
    Write-Host "Time Remaining: $("{0}" -f ([int](new-timespan $(get-date) $endTime).totalseconds))"
    Start-Sleep -Seconds 1
    }

Upvotes: 0

Shay Levy
Shay Levy

Reputation: 126792

Try this way: 

$timeBeforeStart = 3
$waitSeconds = 10

Start-Sleep -Seconds $timeBeforeStart

$waitSeconds..0 | Foreach-Object {
    Write-Host "Time Remaining: $_"
    Start-Sleep -Seconds 1
}


Time Remaining: 10
Time Remaining: 9
Time Remaining: 8
Time Remaining: 7
Time Remaining: 6
Time Remaining: 5
Time Remaining: 4
Time Remaining: 3
Time Remaining: 2
Time Remaining: 1
Time Remaining: 0

Upvotes: 2

Emiliano Poggi
Emiliano Poggi

Reputation: 24826

what is the difference between sleep and "start-sleep -s"?

No difference, sleep is just alias of Start-Sleep.

Unfortunately it doesn't work, the sleep seems to work simultaneity with the counter instead of delay the counter.

You might want to put the sleep before the counter starts before getting the first $timeSpan:

start-sleep -s $timeBeforeStart

$startTime = get-date
$endTime   = $startTime.addSeconds($waitSeconds)
$timeSpan = new-timespan $startTime $endTime
while ($timeSpan -gt 0) 
{
 # ...
}

Upvotes: 2

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