PowerShell脚本命令行运行正常，任务计划程序执行时路径错误

问题根源 #

1. 错误的对象处理：脚本中get-item $media是冗余且错误的操作——$media已经是Get-ChildItem返回的FileInfo对象集合，直接对集合调用Get-Item会导致PowerShell在任务计划上下文里错误解析路径，把文件名误识别为根目录下的文件（如D:\Radio\202303100400.mp4，实际应为D:\Radio\kmox\202303100400.mp4）。
2. 路径拼接依赖工作目录：手动拼接路径时未使用绝对路径工具，任务计划默认工作目录与脚本预期不符时会触发异常。

具体修复步骤 #

1. 修复核心遍历逻辑 #

将出错的文件夹遍历代码：

foreach ($folder in ((get-item $media).DirectoryName) | Select-Object -Unique){

替换为直接读取FileInfo对象的DirectoryName属性：

foreach ($folder in ($media.DirectoryName | Select-Object -Unique)){

2. 统一使用绝对路径生成 #

用Join-Path替代手动拼接路径，避免斜杠错误和相对路径问题：

• 修改$htm_out的赋值：

  if ($path.FullName -eq $path.Root.FullName){
    $title = $title_alt
    $htm_out = Join-Path -Path $path.FullName -ChildPath "mpx.htm"
  }else{
    $title = $path.BaseName
    $htm_out = Join-Path -Path $path.FullName -ChildPath "mpx.htm"
  }
  

• 修改$rss_out的赋值：

  $rss_out = Join-Path -Path $folder -ChildPath "$ext.rss"
  

3. 任务计划配置优化 #

• 在任务计划的操作选项卡中，设置起始于为D:\Radio，确保脚本执行工作目录正确。
• 确认任务执行账户拥有D:\Radio文件夹的读写权限，避免权限不足导致的路径访问失败。

修复后的完整脚本 #

$path= 'D:\Radio'
$site='mysite.com'
Set-Location -Path $path

if ($path -and $(Try{Test-Path $path.trim()} Catch{}) -and (((get-item $path).Attributes) -match "Directory")){
  $path = Get-Item $path
} else {Write-Host "mp2rss error: Invalid" ;exit}
$media = (Get-ChildItem -path $path -File -Recurse -Filter "*.mp*") | Where-Object `
{$_.extension -in ".mp3",".mp4"} | Sort-Object -Descending -Property LastWriteTime
if (!$media.Count){Write-Host "mp2rss error: No Media Found" ;exit}

# done verifying

function when_long($param){
  $param = ($param.AddMinutes(-($param.minute %5)).ToString("h:mmtt ddd, MMM d'th'") -replace
  '(?<!1)1th$','1st' -replace'(?<!1)2th$','2nd' -replace '(?<!1)3th$','3rd') -replace
  '(?<=:\d\d)AM','a' -replace '(?<=:\d\d)PM','p'
  return $param
}
function when_short($param){
  $param = ($param.ToString("ddd"),($param.AddMinutes(-($param.minute %5))).ToString("M/dd h:mmt").ToLower() -join " ")
  return $param
}

if ((Get-Volume -DriveLetter $path.ToString().Substring(0,1)).FileSystemLabel){
    $title_alt = (Get-Volume -DriveLetter $path.ToString().Substring(0,1)).FileSystemLabel
}else{$title_alt = "$env:COMPUTERNAME`($($path.FullName.Substring(0,1))`)"}

if ($path.FullName -eq $path.Root.FullName){
  $title = $title_alt
  $htm_out = Join-Path -Path $path.FullName -ChildPath "mpx.htm"
}else{
  $title = $path.BaseName
  $htm_out = Join-Path -Path $path.FullName -ChildPath "mpx.htm"
}
$html = @("<html><head><title>$title</title></head><body>")

foreach ($folder in ($media.DirectoryName | Select-Object -Unique)){
  $ext = @('mp3','mp4')
  foreach ($ext in $ext){
    if ($media | Where-Object {$_.DirectoryName -in $folder -and $_.Extension -match $ext}){

      if ((Get-Item $folder).FullName -ne (Get-Item $folder).Root.FullName){
        $title = (Get-Item $folder).BaseName
      }else{$title = $title_alt}
      if ($ext -match 'mp4'){$title = "$title [V]"}
      $url = (([System.Uri]$folder).AbsoluteUri.TrimStart(([System.Uri]($path.ToString())).AbsoluteUri))
      if ($url){$url = "$site/$url/"}else{$url = "$site/"}
      $qty = (($media | Where-Object {$_.DirectoryName -in $folder -and $_.Extension -match $ext}) | Measure-Object).Count
      $whn = (when_long ($media | Where-Object {$_.DirectoryName -in $folder -and $_.Extension -match $ext} | Select-Object -First 1).CreationTime)

      $html += "<p><a href=`"http://$url$ext.rss`">$title</a><br>$qty files updated $whn</p>"
      $rss = @("<rss><channel><title>$title</title>")
      $rss += "<description>$qty files updated $whn</description>"

      foreach ($file in ($media | Where-Object {$_.DirectoryName -in $folder -and $_.Extension -match $ext})){
        if ($file.BaseName -match "^\d+$"){
          if ($file.BaseName -match "^\d{12}$"){
            $title = (when_short ([Datetime]::ParseExact($file.BaseName, 'yyyyMMddHHmm', $null)))
            $dsc = (when_long ([Datetime]::ParseExact($file.BaseName, 'yyyyMMddHHmm', $null)))
          }else{
            $title = (when_short $file.CreationTime)
            $dsc = (when_long $file.CreationTime)
          }
        }else{
          $title = $file.BaseName
          $dsc = (when_long $file.CreationTime)
        }
        $rss += "<item><title>$title</title>"
        $rss += "<description>$dsc</description>"
        $rss += "<enclosure url=`"http://$url$([uri]::EscapeDataString($file.Name))`"/></item>"
      }
      $rss += "</channel></rss>"
      $rss_out = Join-Path -Path $folder -ChildPath "$ext.rss"
      if (-not (Test-Path $rss_out) -or (Compare-Object (Get-Content -Path $rss_out) $rss)){Out-File -InputObject $rss -FilePath $rss_out}
    }
  }
}
if (-not (Test-Path $htm_out) -or (Compare-Object (Get-Content -Path $htm_out) $html)){Out-File -InputObject $html -FilePath $htm_out}

内容的提问来源于stack exchange，提问作者mrpaulc