FileSystemWatcher 在 PowerShell 关闭之前不会触发事件

Question

我有一个脚本（如下），它监视 .ps1 脚本所在的文件夹。 创建文件时，它会触发一个 .bat 文件来完成一项工作。

最初它会立即运行并关闭。 所以我加了'''Start-Sleep -s 50'''

它有效，但仅在 PowerShell 窗口关闭时触发 .bat 启动。

（因为我不知道文件夹中出现文件需要多长时间，所以这有点没用。

理想情况下，我可以在创建新文件后立即启动 .bat 文件，然后关闭 PowerShell 窗口

$configFilePath = $PSScriptRoot
$filter = '*.*'

$fsw = New-Object IO.FileSystemWatcher $configFilePath, $filter -Property @{IncludeSubdirectories = $true;NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'}

Register-ObjectEvent $fsw Created -SourceIdentifier FileCreated -Action {
    $name = $Event.SourceEventArgs.Name
    $changeType = $Event.SourceEventArgs.ChangeType
    $timeStamp = $Event.TimeGenerated
    Write-Host "The file '$name' was $changeType at $timeStamp" -fore green
    Out-File -FilePath c:\temp\log\Filelog.txt -Append -InputObject "The file '$name' was $changeType at $timeStamp"
    Set-Location "$PSScriptRoot"
    Start-Process "$PSScriptRoot\PS_Run.bat"
}

Start-Sleep -s 50

Answer 1

您可以将 Start-Sleep 替换为：

Wait-Event -SourceIdentifier FileCreated

然后你需要像这样向你的观察者添加一个退出命令：

Start-Process "$PSScriptRoot\PS_Run.bat"
exit
}

由于您无法从文件观察程序中退出控制台，因此您可以这样做：

$configFilePath = $PSScriptRoot
$filter = '*.*'

$fsw = New-Object IO.FileSystemWatcher $configFilePath, $filter -Property @{IncludeSubdirectories = $true;NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'}

Register-ObjectEvent $fsw Created -SourceIdentifier FileCreated -Action {
    $name = $Event.SourceEventArgs.Name
    $changeType = $Event.SourceEventArgs.ChangeType
    $timeStamp = $Event.TimeGenerated
    Write-Host "The file '$name' was $changeType at $timeStamp" -fore green
    Out-File -FilePath c:\temp\log\Filelog.txt -Append -InputObject "The file '$name' was $changeType at $timeStamp"
    Set-Location "$PSScriptRoot"
    Start-Process "$PSScriptRoot\PS_Run.bat"
}
Wait-Event -SourceIdentifier FileCreated -Timeout 50 # or no of seconds before file shows up.

当作为计划任务运行时，这将在创建新文件后立即执行 bat 文件，并在达到超时时关闭控制台。