PowerShell - 是否每小时创建一个文件？

Question

我正在尝试创建一个 PowerShell 脚本，该脚本将每天早上运行一次（通过任务计划程序）并提醒某人（通过直接发送（我知道如何执行此操作，稍后将实现所述功能）） t 在前一天的每个小时内创建，以便不再需要手动执行此操作或出现问题时。文件名，如 $FilePattern 所示，都包含它们的创建日期以及时间。显然，我的 Foreach 循环中的逻辑是有缺陷的，因为 $Time 将始终以 $Hours 为单位，但我一直在摸不着头脑，无法弄清楚我应该如何去做。我以为我可以比较两个数组，但我现在不太确定。我还遇到了看起来很有希望的 Compare-Object，但我无法完全掌握它。我为混乱道歉。我目前的代码如下。

[CmdletBinding()]

param(

    [Parameter(Mandatory=$false)]
    [ValidateScript({ Test-Path $_ -PathType Container })]
    [string]
    $Path = "C:\Users\<username>\Desktop\Archive",
    $Year = [DateTime]::Today.AddDays(-1).Year,
    $Month = [DateTime]::Today.AddDays(-1).Month,
    $Day = ([DateTime]::Today.AddDays(-1).Day),
    $strMonth = ([String]$Month).PadLeft(2,'0'),
    $strDay = ([String]$Day).PadLeft(2,'0'),
    $Date = "$Year" + "$strMonth" + "$strDay",
    $FilePattern = @("850_" + $Date + "*.txt"),
    $Files = (Get-ChildItem -Path $Path -Include $FilePattern -Recurse | 
        Select-Object -ExpandProperty CreationTime | Get-Date -f "yyyyMMdd"),
    $Time = (Get-ChildItem -Path $Path -Include $FilePattern -Recurse |
        Select-Object -ExpandProperty CreationTime | Get-Date -f "hh"),
    $Hours = @(0..23)

)

Foreach ($File in $Files) {

    #if (-Not (Test-Path "$Path\$FilePattern")) {
    #    Write-Host "Warning: The file path doesn't exist!"
    #} else {
    #    Write-Host "The file path exists..."
    #}

    if ($Hours -notin $Time) {
        Write-Host "There's no file present for $Time o'clock for $Date."
    } else {
        Write-Host "There's at least one file per hour for $Date."
    }

}

Answer 1

这是一个更短且可能更易读的实现：

$Path = "C:\Users\<username>\Desktop\Archive\*"
$Date = (Get-Date).AddDays(-1).ToString('yyyyMMdd')
$Hours = Get-ChildItem -Path $Path -Include "850_$($Date)*.txt" | ForEach-Object {(Get-Date $_.CreationTime).Hour} | Sort-Object | Get-Unique
for ($Hour = 0; $Hour -lt 24; $Hour++) {
    if ($Hour -in $Hours) {
        Write-Host "There's at least one file for $Hour o'clock for $Date." -ForegroundColor Green
    } else {
        Write-Host "There's no file present for $Hour o'clock for $Date." -ForegroundColor Red
    }
}

那么我改变了什么：

• 我删除了params 块，因为我认为您只是使用它来初始化变量，但它旨在定义您想要传递给函数的参数。看起来您不想向该脚本传递任何内容。纠正我，如果我错了。
• 我在您的路径中添加了一个星号 (*) 以使 -Include 参数起作用（请参阅 docs）。我认为您添加了-Recurse 以使其正常工作。仅当您的日志位于子目录中时才使用 -Recurse。
• 我添加了一种更具可读性和更易于理解的方法来创建所需的时间戳。
• 我提取了小时数，您正在寻找数字，因此您可以将它们与数字进行比较，而不必创建由两位数字字符串化小时数组成的数组。
• 如果缺少任何文件，我在输出中添加了颜色以获得更快的概览。

Answer 2

我仍然需要重构和更改一些东西，但这似乎可行。

[CmdletBinding()]

param(

    $Path = "C:\Users\<username>\Desktop\Archive",
    $Year = [DateTime]::Today.AddDays(-1).Year,
    $Month = [DateTime]::Today.AddDays(-1).Month,
    $strMonth = ([String]$Month).PadLeft(2,'0'),
    $Day = ([DateTime]::Today.AddDays(-1).Day),
    $strDay = ([String]$Day).PadLeft(2,'0'),
    $Date = "$Year" + "$strMonth" + "$strDay",
    $Hours = @(
        "00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11",
        "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23"
    ),
    $strHours = $Hours.ToString().PadLeft(2,'0'),
    $FilePattern = @("850_" + $Date + "*.txt"),
    $Files = (Get-ChildItem -Path $Path -Include $FilePattern -Recurse | 
        Select-Object -ExpandProperty CreationTime | Get-Date -f "HH")

)

ForEach ($Hour in $Hours) {

    if ($Hour -notin $Files) {

        Write-Host "There's no file present for $Hour o'clock for $Date."

    } else {

        Write-Host "There's at least one file for $Hour o'clock for $Date."

    }

}