Powershell：文件完成复制后执行脚本答案

【问题标题】：Powershell: Execute a script after file finishes copyingPowershell：文件完成复制后执行脚本
【发布时间】：2014-01-30 13:24:55
【问题描述】：

我遇到了 IO.FileSystemWatcher 的问题。我有一个脚本，当文件复制到某个目录时，它会处理该文件并将其复制到网络上的另一个文件夹。但是有一个问题，一旦 fsw 触发 oncreate 事件，它就会开始复制，这会产生错误（文件已打开），我希望它仅在文件完成复制后才开始。重命名和删除工作正常。 cloud.ps1 是处理文件并复制它的脚本。这是监控脚本的代码：

$watch = '\\HR-ZAG-SR-0011\ACO\ACO2\99. BOX'
$watcher = New-Object System.IO.FileSystemWatcher
$watcher.Path = $watch
$watcher.IncludeSubdirectories = $true
$watcher.EnableRaisingEvents = $true

$changed = Register-ObjectEvent $watcher "Changed" -Action {
#    Write-Host "Changed: $($eventArgs.ChangeType)"
#    $watch\cloud.ps1 modify "$($eventArgs.FullPath)"
}
$created = Register-ObjectEvent $watcher "Created" -Action {
   Write-Host "Created: $($eventArgs.FullPath)"
   .\cloud.ps1 create "$($eventArgs.FullPath)"
}
$deleted = Register-ObjectEvent $watcher "Deleted" -Action {
   Write-Host "Deleted: $($eventArgs.FullPath)"
   .\cloud.ps1 delete "$($eventArgs.FullPath)"
}
$renamed = Register-ObjectEvent $watcher "Renamed" -Action {
   Write-Host "Renamed: $($eventArgs.OldFullPath) to $($eventArgs.FullPath)"
   .\cloud.ps1 rename "$($eventArgs.OldFullPath)" "$($eventArgs.FullPath)"
}

【问题讨论】：

标签： powershell file-io filesystemwatcher

【解决方案1】：

你可以放入一个循环开始检查你是否可以获得文件的写锁：

While ($True)
 {
   Try { 
         [IO.File]::OpenWrite($file).Close() 
         Break
       }
   Catch { Start-Sleep -Seconds 1 }
 }

只要正在写入文件，就无法获得写锁，Try 会失败。写入完成并关闭文件后，OpenWrite 将成功，循环将中断，您可以继续复制文件。

【讨论】：