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茫茫網海中的冷日
發生過的事，不可能遺忘，只是想不起來而已！ |
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冷日
(冷日) |
發表時間：2016/1/23 9:07 |
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- 註冊日: 2008/2/19
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- [分享]如何用 Powershell 比對時間差
- 冷日為了因些因素，需要知道時間差，所以找了一下網路上的範例，這裡整理一下！
找到的第一篇是這個：PowerTip: Get Time Difference between Dates with PowerShell - Hey, Scripting Guy! Blog - Site Home - TechNet Blogs
Get Time Difference between Dates with PowerShell
Summary: Use New-TimeSpan to produce the time difference between two dates.
Hey, Scripting Guy! Question I know I can subtract dates, but is there a Windows PoweShell cmdlet to show me the time difference between dates?
Hey, Scripting Guy! Answer Use New-TimeSpan and supply the information!
For example, to show the difference between today and the upcoming New Year:
$StartDate=(GET-DATE)
$EndDate=[datetime]”01/01/2014 00:00”
NEW-TIMESPAN –Start $StartDate –End $EndDate
冷日：
看起來就是利用『GET-DATE』，然後可以直接減？
恩，應該不難！
然後是這篇：Difference between dates using powershell - Stack Overflow
Difference between dates using powershell
I am learning windows powershell and I am trying to get the months difference given two dates:
$now = get-date
$date = $end -as [DateTime];
if (!$date)
{
'You entered an invalid date'
}
else
{
$nts = ($now - $end ).Months
write-output $nts
}
I have tried everything, and I can't get the correct months in powershell. any ideas will be much appreciated.
Something like this?
$begin = [datetime]'02/10/2011'
$end = [datetime]'01/10/2013'
$monthdiff = $end.month - $begin.month + (($end.Year - $begin.year) * 12)
$monthdiff
Amazing!! thanks this worked like a charm!! – Menew Jan 10 '14 at 19:44
Where is the $endFromDatabase variable coming from? That part isn't clear in your post.
To demonstrate subtracting DateTime objects, see the example below.
$TimeSpan = [DateTime]'2014-01-10' - [DateTime]'2014-01-06';
You will receive a System.TimeSpan as a result from the operation, so you can explore members such as:
My guess is that you just need to fix the value in the $endFromDatabase variable, so that it can be cast into a System.DateTime object.
冷日：
這裡冷日看到的關鍵應該是
$end.month - $begin.month
也就是說，Get-Date 以後，可以直接取用他的一些常數，我們就可以直接取秒、分、時、日、月、年的差額！
恩，看你需要的是啥囉！
而後看到的是這篇：Time Difference in Powershell - Spiceworks
Time Difference in Powershell
I wanted to post this solution to a Powershell problem I had because I couldn't find any examples on the internet.
I needed to be able to calculate the difference between a timestamp from the last 24 hours, and the current time.
The input and output formats needed to be hh:mm:ss
Here's how I did it:
$Time1 = "15:30:00"
$Time2 = Get-Date -format HH:mm:ss
$TimeDiff = New-TimeSpan $Time1 $Time2
if ($TimeDiff.Seconds -lt 0) {
$Hrs = ($TimeDiff.Hours) + 23
$Mins = ($TimeDiff.Minutes) + 59
$Secs = ($TimeDiff.Seconds) + 59 }
else {
$Hrs = $TimeDiff.Hours
$Mins = $TimeDiff.Minutes
$Secs = $TimeDiff.Seconds }
$Difference = '{0:00}:{1:00}:{2:00}' -f $Hrs,$Mins,$Secs
$Difference
I hope this helps someone else.
冷日：
基本上他把冷日上一篇所說的的時（Hours）分（Minutes）秒（Seconds）都說得很清楚了，看來真的不難！
最後就補上官方的說明文件：https://technet.microsoft.com/zh-tw/library/hh849887.aspx
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