.net 如何使用 PowerShell 检查文件是否超过特定时间？
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How can I check if a file is older than a certain time with PowerShell?
提问by pencilCake
How can I check in Powershellto see if a file in $fullPath is older than "5 days 10 hours 5 minutes" ?
如何检查Powershell以查看 $fullPath 中的文件是否早于“5 天 10 小时 5 分钟”？
(by OLD, I meanif it was created or modified NOT later than 5 days 10 hours 5 minutes)
（旧的，我的意思是如果它是在不迟于 5 天 10 小时 5 分钟的时间内创建或修改的）
回答by x0n
Here's quite a succinct yet very readable way to do this:
这是一个非常简洁但非常易读的方法来做到这一点：
$lastWrite = (get-item $fullPath).LastWriteTime
$timespan = new-timespan -days 5 -hours 10 -minutes 5
if (((get-date) - $lastWrite) -gt $timespan) {
# older
} else {
# newer
}
The reason this works is because subtracting two dates gives you a timespan. Timespans are comparable with standard operators.
这样做的原因是因为减去两个日期会给你一个时间跨度。时间跨度与标准运算符相当。
Hope this helps.
希望这可以帮助。
回答by Manuel Batsching
Test-Pathcan do this for you:
Test-Path可以为您做到这一点：
Test-Path $fullPath -OlderThan (Get-Date).AddDays(-5).AddHours(-10).AddMinutes(-5)
回答by chue x
This powershell script will show files older than 5 days, 10 hours, and 5 minutes. You can save it as a file with a .ps1extension and then run it:
此 powershell 脚本将显示超过 5 天、10 小时和 5 分钟的文件。您可以将其另存为带有.ps1扩展名的文件，然后运行它：
# You may want to adjust these
$fullPath = "c:\path\to\your\files"
$numdays = 5
$numhours = 10
$nummins = 5
function ShowOldFiles($path, $days, $hours, $mins)
{
$files = @(get-childitem $path -include *.* -recurse | where {($_.LastWriteTime -lt (Get-Date).AddDays(-$days).AddHours(-$hours).AddMinutes(-$mins)) -and ($_.psIsContainer -eq $false)})
if ($files -ne $NULL)
{
for ($idx = 0; $idx -lt $files.Length; $idx++)
{
$file = $files[$idx]
write-host ("Old: " + $file.Name) -Fore Red
}
}
}
ShowOldFiles $fullPath $numdays $numhours $nummins
The following is a little bit more detail about the line that filters the files. It is split into multiple lines (may not be legal powershell) so that I could include comments:
以下是有关过滤文件的行的更多详细信息。它被分成多行（可能不是合法的 powershell），以便我可以包含评论：
$files = @(
# gets all children at the path, recursing into sub-folders
get-childitem $path -include *.* -recurse |
where {
# compares the mod date on the file with the current date,
# subtracting your criteria (5 days, 10 hours, 5 min)
($_.LastWriteTime -lt (Get-Date).AddDays(-$days).AddHours(-$hours).AddMinutes(-$mins))
# only files (not folders)
-and ($_.psIsContainer -eq $false)
}
)
