powershell - Powershell Change Watcher 仅在目录上触发

Question

我正在 powershell 中构建一个文件监视脚本。我一直在操作以下代码：https ://gallery.technet.microsoft.com/scriptcenter/Powershell-FileSystemWatche-dfd7084b

一切似乎都很好，但是当我进行一些实际测试时，我注意到更改事件仅在父目录上触发，而不是在实际文件本身上触发。以下是我偷猎和更新的代码：

$folder = 'C:\extended_attributes\testing\DesignerVistaReorganize' # Enter the root path you want to monitor. 
$filter = '*.*'  # You can enter a wildcard filter here. 

# In the following line, you can change 'IncludeSubdirectories to $true if required.                           
$fsw = New-Object IO.FileSystemWatcher $folder, $filter -Property @{IncludeSubdirectories = $true;NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'} 

# Here, all three events are registerd.  You need only subscribe to events that you need: 

Register-ObjectEvent $fsw Created -SourceIdentifier FileCreated -Action { 
    $name        = $Event.SourceEventArgs.Name 
    $changeType  = $Event.SourceEventArgs.ChangeType 
    $timeStamp   = $Event.TimeGenerated 
    $filePath    = -join($folder,"\",$name) | Out-String
    Write-Host "The file '$filePath' was $changeType at $timeStamp" -fore green 
    Out-File -FilePath C:\extended_attributes\testing\outlog.txt -Append -InputObject "The file '$filePath' was $changeType at $timeStamp"} 

Register-ObjectEvent $fsw Deleted -SourceIdentifier FileDeleted -Action { 
    $name        = $Event.SourceEventArgs.Name 
    $changeType  = $Event.SourceEventArgs.ChangeType 
    $timeStamp   = $Event.TimeGenerated 
    $filePath    = -join($folder,"\",$name) | Out-String
    Write-Host "The file '$filePath' was $changeType at $timeStamp" -fore red 
    Out-File -FilePath C:\extended_attributes\testing\outlog.txt -Append -InputObject "The file '$filePath' was $changeType at $timeStamp"} 

Register-ObjectEvent $fsw Changed -SourceIdentifier FileChanged -Action { 
    $name        = $Event.SourceEventArgs.Name 
    $changeType  = $Event.SourceEventArgs.ChangeType 
    $timeStamp   = $Event.TimeGenerated 
    $filePath    = -join($folder,"\",$name) | Out-String
    Write-Host "The file '$filePath' was $changeType at $timeStamp" -fore white 
    Out-File -FilePath c:\scripts\filechange\outlog.txt -Append -InputObject "The file '$filePath' was $changeType at $timeStamp"} 

删除和创建事件按预期工作（如下所示）：

文件创建：

The file 'C:\extended_attributes\testing\DesignerVistaReorganize\Cart_Warnings\newFile.txt' Created at 10/01/2018 14:55:35

文件更改：

The file 'C:\extended_attributes\testing\DesignerVistaReorganize\Cart_Warnings'

于 2018 年 10 月 1 日 15:01:18 更改

文件删除：

The file 'C:\extended_attributes\testing\DesignerVistaReorganize\Cart_Warnings\newFile.txt' Deleted at 10/01/2018 14:56:47

我注意到的另一件事是更改事件仅在根目录下的第一个文件更改时触发。其他两个事件在文件被创建或删除时触发。以前有没有人遇到过这个问题，如果是这样，您能否提供一些有关解决方法的见解？

解决方法（虽然不是有效的答案）

我尝试了很多不同的方法来让这个事件持续触发，但似乎只有一个有效。我有两个用于文件更改事件的脚本。它们几乎相同，只是它们在事件完成后相互调用。关键不是确保您在调用第二个脚本之前通过取消注册事件来杀死观察者。

脚本 1

$folder = 'C:\extended_attributes\testing\DesignerVistaReorganize' # Enter the root path you want to monitor. 
$filter = '*.*'  # You can enter a wildcard filter here. 

# In the following line, you can change 'IncludeSubdirectories to $true if required.                           
$fsw = New-Object IO.FileSystemWatcher $folder, $filter -Property @{IncludeSubdirectories = $true;NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'} 

Register-ObjectEvent $fsw Changed -SourceIdentifier FileChanged -Action { 
        echo "Script 1"
        $name = $Event.SourceEventArgs.Name 
        $changeType = $Event.SourceEventArgs.ChangeType 
        $timeStamp = $Event.TimeGenerated 
        $filePath    = -join($folder,"\",$name) | Out-String
        Unregister-Event FileChanged
        Write-Host "The file '$filePath' was $changeType at $timeStamp" -fore white 
        Out-File -FilePath C:\extended_attributes\testing\outlog.txt -Append -InputObject "The file '$filePath' was $changeType at $timeStamp"
        .\change_watcher_2.ps1
} 

脚本 2

$folder = 'C:\extended_attributes\testing\DesignerVistaReorganize' # Enter the root path you want to monitor. 
$filter = '*.*'  # You can enter a wildcard filter here. 

# In the following line, you can change 'IncludeSubdirectories to $true if required.                           
$fsw = New-Object IO.FileSystemWatcher $folder, $filter -Property @{IncludeSubdirectories = $true;NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'} 


Register-ObjectEvent $fsw Changed -SourceIdentifier FileChanged -Action { 
        echo "Script 2"
        $name = $Event.SourceEventArgs.Name 
        $changeType = $Event.SourceEventArgs.ChangeType 
        $timeStamp = $Event.TimeGenerated 
        $filePath    = -join($folder,"\",$name) | Out-String
        Unregister-Event FileChanged
        Write-Host "The file '$filePath' was $changeType at $timeStamp" -fore white 
        Out-File -FilePath C:\extended_attributes\testing\outlog.txt -Append -InputObject "The file '$filePath' was $changeType at $timeStamp"
        .\change_watcher_1.ps1
} 

输出

PS C:\extended_attributes\testing> C:\extended_attributes\testing\change_watcher_1.ps1

Id     Name            PSJobTypeName   State         HasMoreData     Location             Command                  
--     ----            -------------   -----         -----------     --------             -------                  
2      FileChanged                     NotStarted    False                                 ...                     



PS C:\extended_attributes\testing> The file 'C:\extended_attributes\testing\DesignerVistaReorganize\BusinessPrinting
' was Changed at 10/02/2018 10:46:43
The file 'C:\extended_attributes\testing\DesignerVistaReorganize\Editor_Warnings
' was Changed at 10/02/2018 10:47:09
The file 'C:\extended_attributes\testing\DesignerVistaReorganize\Mobile\Mobile_Control_Panel_2015_05_14.dvf
' was Changed at 10/02/2018 10:49:50
The file 'C:\extended_attributes\testing\DesignerVistaReorganize\Mobile
' was Changed at 10/02/2018 10:49:58
The file 'C:\extended_attributes\testing\DesignerVistaReorganize\Mobile\Gradients_Panels_Colors_Menus_2015_03_01.dvf
' was Changed at 10/02/2018 10:51:49
The file 'C:\extended_attributes\testing\DesignerVistaReorganize\Mobile\Tablet_Editor_2015_03_31.dvf
' was Changed at 10/02/2018 10:52:46
The file 'C:\extended_attributes\testing\DesignerVistaReorganize\Mobile
' was Changed at 10/02/2018 10:52:57

我真的想要一个比这更好的解决方案，因为我可以预见这种方法会产生许多问题。

标签： powershellfilesystemwatcher

Answer 1

我找到了一个比我在原始问题更新中发布的更好的解决方案。如果您使用 EnableRaisingEvents 的属性，如下所示。每次对文件系统进行更改时都会触发该事件：

$watcher = New-Object System.IO.FileSystemWatcher
$watcher.Path = 'C:\extended_attributes\testing\DesignerVistaReorganize'
$watcher.IncludeSubdirectories = $true
$watcher.EnableRaisingEvents = $true


$changed = Register-ObjectEvent $watcher "Changed" -Action {
    write-host "Changed: $($eventArgs.FullPath)"
    $creation_time = gi -Path $eventArgs.FullPath    | get-itemproperty | select -ExpandProperty CreationTime | Get-date -Format s
    $file_extension = gi -Path $eventArgs.FullPath   | get-itemproperty | select -ExpandProperty Extension    
    $file_base_name = gi -Path $eventArgs.FullPath   | get-itemproperty | select -ExpandProperty BaseName     
    $last_access_time = gi -Path $eventArgs.FullPath | get-itemproperty | select -ExpandProperty LastAccessTime | Get-date -Format s
    $last_write_time = gi -Path $eventArgs.FullPath  | get-itemproperty | select -ExpandProperty LastWriteTime | Get-date -Format s

    Write-Host "Creation time: $($creation_time)"
    Write-Host "ex: $($file_extension)"
    Write-Host "Name: $($file_base_name)"
    Write-Host "access: $($last_access_time)"
    Write-Host "write: $($last_write_time)"

    $object = New-Object System.Object
    $object | Add-Member -type NoteProperty –Name Extension –Value  $file_extension
    $object | Add-Member -type NoteProperty –Name BaseName –Value $file_base_name
    $object | Add-Member -type NoteProperty –Name Createtime –Value $creation_time
    $object | Add-Member -type NoteProperty –Name Accesstime –Value $last_write_time
    $object | Add-Member -type NoteProperty –Name Writetime –Value $last_access_time

    Write-Host "After Object"

    # Load the module
    Import-Module Mdbc
    # Connect the new collection test.test
    Connect-Mdbc . test test -NewCollection
    # add the objects to the collection
    $object | Add-MdbcData
    # Get all data as custom objects and show them in a table
    Get-MdbcData -As PS | Format-Table -AutoSize | Out-String
}