Question

我正在尝试在Powershell中使用$ FileSystemWatcher，它在由程序生成时似乎会丢失某些更改。

机器的一个应用程序会生成一个xml文件，该文件包含用于生成零件的参数。通过机器附带的软件进行修改时，我看到上次修改的日期已更改。但是，我没有注册任何活动。

如果我获取xml文件，请将其打开，修改并关闭，然后将事件注册。

下面是我使用的代码。

关于原因和解决方案的任何想法吗？

    $PathToMonitor = "C:\Test"
$FileSystemWatcher = New-Object System.IO.FileSystemWatcher
$FileSystemWatcher.Path  = $PathToMonitor
$FileSystemWatcher.Filter= "product.xml"
$FileSystemWatcher.IncludeSubdirectories = $true

$FileSystemWatcher.EnableRaisingEvents = $true
$previoustimestamp = $null
$previousfullpath = $null


# define the code that should execute when a file change is detected
$Action = {
    $Timestamp = $event.TimeGenerated
    $details = $event.SourceEventArgs
    $FullPath = $details.FullPath


    if (($previoustimestamp -ne $Timestamp) -and ($previousfullpath -ne $FullPath)){
    $previoustimestamp= $Timestamp
    $previousfullpath = $FullPath


    $Name = $details.Name
    $FullPath = $details.FullPath
    $OldFullPath = $details.OldFullPath
    $OldName = $details.OldName
    $ChangeType = $details.ChangeType
    

    # you can also execute code based on change type here
    switch ($ChangeType)
    {
        'Changed' { "CHANGED" 
  
            $OriginalPath=$FullPath.split("\")
            $OriginalPath=$OriginalPath[0]+"\"+$OriginalPath[1]+"\"+$OriginalPath[2]+"\"+$OriginalPath[3]+"\"+  $OriginalPath[4]+"\"  
            
            $RecipeFolder=$OriginalPath.split("\")
            $RecipeFolder=$RecipeFolder[4]
            Write-Host $RecipeFolder[4]
            $OriginalRecipeFolder=$RecipeFolder
            $RecipeFolder+="_"+$timeStamp
            $NewRecipeFolder=$RecipeFolder.Replace("/","_").Replace(" ","_").Replace(":","_")
            $BackupPath=$OriginalPath.Replace("Products","Backup").Replace($OriginalRecipeFolder,$NewRecipeFolder)

        Copy-Item -Path $OriginalPath -Destination $BackupPath -Recurse

        Write-Host "Backup done of recipe $OriginalRecipeFolder from $OriginalPath to $BackupPath at $timeStamp because $changetype" -ForegroundColor Yellow
        Start-Sleep -Seconds 5
        
    }   
 }   
 }

}

# add event handlers
$handlers = . {
    Register-ObjectEvent -InputObject $FileSystemWatcher -EventName Changed -Action $Action -SourceIdentifier FsChange 
    #FSCreate FSDelete FSRename
}

Write-Host "Watching for changes to $PathToMonitor"

try
{
   do

    enter code here
    {
        Wait-Event -Timeout 1
       Write-Host "." -NoNewline
        
    } while ($true)
}
finally
{
    # this gets executed when user presses CTRL+C
    # remove the event handlers
    Unregister-Event -SourceIdentifier FSChange
    # remove background jobs
    $handlers | Remove-Job
    # remove filesystemwatcher
    $FileSystemWatcher.EnableRaisingEvents = $false
    $FileSystemWatcher.Dispose()
    "Event Handler disabled."
}

Powershell FileSystemWatcher丢失更改

0 个答案: