$ Event.SourceEventArgs。 <attribute>がnullまたは空のオブジェクトを返しています

Question

私はFileSystemWatcherプログラムを持っています。イベントが発生するたびに、変更がどこで発生したか通知する電子メールが送信されます。

ただし、$Event.SourceEventArgs.FullPathは空を返し、その他の属性は$nullを返します。

関連コード：

Function Watch{ 
$global:FileChanged = $false 
$folder = "\\foo\boo\here\is\folder" 
$filter = "*this is the filter*" 
$watcher = New-Object IO.FileSystemWatcher $folder, $filter -Property @{ 

     IncludeSubdirectories = $true 
     EnableRaisingEvents = $true 
    } 
# Start-Sleep -Seconds 1 

Register-ObjectEvent $watcher "Changed" -Action {$global:FileChanged = $true} > $null 
# Register-ObjectEvent $watcher "Created" -Action {$global:FileChanged = $true} > $null 
# Register-ObjectEvent $watcher "Deleted" -Action {$global:FileChanged = $true} > $null 
# $watcher.EnableRaisingEvents = $true 

while($true){ 

    while($global:FileChanged -eq $false){ 
     Start-Sleep -Milliseconds 250 

    } 
$global:FileChanged = $false 
$paths = $Event.SourceEventArgs.FullPath 
$name = $Event.SourceEventArgs.FileName 
$changetype = $Event.SourceEventArgs.ChangeType 
$TimeChanged = $Event.TimeGenerated 
RunScript $paths, $name, $changetype, $TimeChanged 
} 
} 
Function RunScript 
{ 
    param($paths, $name, $changetype, $TimeChanged) 

    Write-Host "This should work $paths $name $changetype $TimeChanged" 
    $From = "email" 
    $ToAddress = "email" 
    $MessageSubject = "Form Submitted by $paths" 
    $MessageBody = "File Path: $Event.SourceEventArgs.FullPath 
    Name: $name 
    Change Type?: $changetype 
    Time Changed: $timechanged" 
    $SendingServer = "999.999.999.9.9" 
    $SMTPMessage = New-Object System.Net.Mail.MailMessage $From, $ToAddress, 
$MessageSubject, $MessageBody 
$SMTPClient = New-Object System.Net.Mail.SMTPClient $SendingServer 
$SMTPClient.Send($SMTPMessage) 
} 

Watcher 

Answer 1

更新例。注：私はこれを全くテストしていないので、バグがある可能性があることに注意してください。私はいくつかのコメントとコードの他のセクションのためのいくつかの異なるアプローチを追加しました。

Function Watch { 
    $folder = "\\foo\boo\here\is\folder" 
    $filter = "*this is the filter*" 
    $watcher = New-Object IO.FileSystemWatcher $folder, $filter -Property @{ 
     IncludeSubdirectories = $true 
     EnableRaisingEvents = $true 
    } 
    # Start-Sleep -Seconds 1 

    Register-ObjectEvent $watcher "Changed" > $null 
    # Register-ObjectEvent $watcher "Created" > $null 
    # Register-ObjectEvent $watcher "Deleted" > $null 
    # $watcher.EnableRaisingEvents = $true 

    while($true){ 
     Wait-Event | Get-Event | ForEach-Object { 
      # $paths = $_.SourceEventArgs.FullPath 
      # $name = $_.SourceEventArgs.FileName 
      # $changetype = $_.SourceEventArgs.ChangeType 
      # $TimeChanged = $_.TimeGenerated 
      # If you comma-delimit this list you pass all of the arguments into "RunScript". 
      # Either name the parameters or make them positional. 
      # Positional: 
      # RunScript $paths $name $changetype $TimeChanged 
      # Named: 
      # RunScript -Paths $paths -Name $name -ChangeType $changetype -TimeChanged $TimeChanged 
      # Or use Splatting: 
      $params = @{ 
       Paths  = $_.SourceEventArgs.FullPath 
       Name  = $_.SourceEventArgs.FileName 
       ChangeType = $_.SourceEventArgs.ChangeType 
       TimeChanged = $_.TimeGenerated 
      } 
      RunScript @params 

     } 
    } 
} 

Function RunScript { 
    param($paths, $name, $changetype, $TimeChanged) 

    Write-Host "This should work $paths $name $changetype $TimeChanged" 
    # $From = "email" 
    # $ToAddress = "email" 
    # $MessageSubject = "Form Submitted by $paths" 
    # $MessageBody = "File Path: $Event.SourceEventArgs.FullPath 
    # Name: $name 
    # Change Type?: $changetype 
    # Time Changed: $timechanged" 
    # $SendingServer = "999.999.999.9.9" 
    # $SMTPMessage = New-Object System.Net.Mail.MailMessage $From, $ToAddress, 
    # $MessageSubject, $MessageBody 
    # $SMTPClient = New-Object System.Net.Mail.SMTPClient $SendingServer 
    # $SMTPClient.Send($SMTPMessage) 

    # Is there a reason you're not using Send-MailMessage? 
    # Splatting again :) 
    # The body of the email isn't going to be very pretty, but it's a start. 
    $params = @{ 
     From = "email" 
     To = "email" 
     Subject = "Form Submitted by $paths" 
     Body = "File Path: $paths 
     Name: $name 
     Change Type?: $changetype 
     Time Changed: $timechanged" 
     " 
     SmtpServer = "999.999.999.9.9" 
    } 
    Send-MailMessage @params 


} 

ここで注意が必要です。 FileSystemWatcherは便利ですが、Windowsがどのように動作するかによって、単一の変更に対して2つのイベント通知を受け取る可能性があります（これはコードの問題ではなくWindowsの深刻な問題です）。それを試してみてください。

クリス

編集：アクションパラメータを削除するのを忘れました。それは今行ってしまった。