Question

我正在使用以下代码启动

$folder = '....' 
$filter = '*.csv' 
$fsw = New-Object IO.FileSystemWatcher $folder, $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
    ... #execute a program to read the files, 
    ... #may fail because file is still being writing..... }

但是，我会在创建文件后立即触发操作。可能有数百个拥抱文件要在文件夹中转储/复制。是否可以测试文件是否完成？

Answer 1

一种可能性：

Try {
  [IO.File]::OpenWrite($File).Close()
  #Do something with file
}
Catch {}

如果文件已写入并已关闭[IO.File]::OpenWrite($File).Close() 将打开文件进行写入，然后立即关闭它。如果它仍然被写入，则无法获得写锁定，该命令将失败，脚本将进入Catch块并等待下一个LastWrite事件。

创建和关闭文件后如何使FileSystemWatcher触发操作？

1 个答案: