如果你绝对需要使用-Format选项，那么就这样做:

$dateStr = Get-Date $date -Format "yyyMMdd"

然而

$dateStr = $date.toString('yyyMMdd')

可能更有效率…：）

和在。net中一样:

$DateStr = $Date.ToString("yyyyMMdd")

Or:

$DateStr = '{0:yyyyMMdd}' -f $Date

你可以做的一件事是:

$date.ToString("yyyyMMdd")

如果你绝对需要使用-Format选项，那么就这样做:

$dateStr = Get-Date $date -Format "yyyMMdd"

然而

$dateStr = $date.toString('yyyMMdd')

可能更有效率…：）

你可以用它来选择你想要的格式，然后在任何需要的地方跳过它。

$DTFormats = (Get-Date).GetDateTimeFormats()
$Formats = @()
$i=0
While ($i -lt $DTFormats.Count){
    $row = [PSCustomObject]@{
        'IndexNumber' = $i
        'DateTime Format' = $DTFormats[$i]
    }
    $Formats += $row
    $i++
}

$DTSelection = ($Formats | Out-GridView -OutputMode Single -Title 'Select DateTime Format').IndexNumber
$MyDTFormat = "(Get-Date).GetDateTimeFormats()[$DTSelection]"
Write-Host " "
Write-Host " Use the following code snippet to get the DateTime format you selected:"
Write-Host "    $MyDTFormat" -ForegroundColor Green
Write-Host " "
$MyDTFormat | Clip
Write-Host " The code snippet has been copied to your clipboard. Paste snippet where needed."

一个简单而又好的方法是:

$time = (Get-Date).ToString("yyyy:MM:dd")