Question

我有一个用于维护窗口的功能。我试图找出我做的方式，实际上是最好的方法。

我以格式“2015-05-07 01:00 + 13:00”传递日期，并希望将其与运行日期进行比较。即今天为此目的的日期。传入的日期将传入一个变量，为了测试我只需手动输入它。因此，HelpMessage。

到目前为止，我认为有效，我相信有更有效的方式来运行我想要的东西。

代码如下：

Function Get-MaintenanceWindow {
PARAM (
[cmdletbinding()]
    [Parameter(Position=1,
        Mandatory=$True,
        HelpMessage="Enter maintenance window to compare against i.e 2015-05-07 01:00+13:00")]
    $Window
)
    # Pass in two var and compare against, if $window1 < $Window2 still in Window
    Write-Host ""
    Write-Host " * * * Running Function Maintenance Window * * * "
    #Compares two dates
    $TodaysDate = (Get-Date)
    $xTodaysDate = (Get-Date -Format yyyyMMddhhmm $TodaysDate)
    $xWindow = (Get-Date -Format yyyyMMddhhmm $Window)

    Write-Host "Today's date is : $xTodaysDate, compared to date is : $xWindow"

    Write-Host "Comparing against today's date $xTodaysDate against passed date $Window..."
    If ($xTodaysDate -lt $xWindow) {
        Write-host $xTodaysDate " is less than `$xWindow $xWindow, still in Maintenance Window!"
        $global:Check = $True
        }
    Else {
        Write-Host "Not in Maintenance Window, exiting..."
        #$Y = (Get-Date) +  " is less than `$Window $Window, still in Maintenance Window!"
        $global:Check = $False
        Break #Exits Function
    }
}

Answer 1

是的，有一种（方式）更简单的方法可以做到这一点。 PowerShell（即.NET）对日期非常酷。

    $TodaysDate = [DateTime]::Now
    $xWindow = [DateTime] $Window

它会自动为您解析日期，并且效果非常好。请参阅以下示例：

$date = [DateTime] "5:00 PM"
$date = [DateTime] "Mon, Jan 5, 2014"
$date = [DateTime] "May 4"

在PowerShell中将日期与日期进行比较

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