取消註冊所有自定義對象事件

Question

我想在所有取消註冊任何自定義Register-ObjectEvent的代碼之前運行命令;有些命令與對象事件的Remove-Jobs *類似。我想這樣做，因爲如果我嘗試兩次註冊$watcher，它會引發錯誤。有沒有叫Get-ObjectEvent命令，否則我就不會問這個

$folder = "C:\some\path\to\folder" 

# File it is watching 
$filter = "flag.txt" 

# Instantiate Watcher 
$Watcher = New-Object IO.FileSystemWatcher $folder, $filter -Property @{ 
    IncludeSubdirectories = $false 
    NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite' 
} 

# EVENT: $filter is created 
$onCreated = Register-ObjectEvent $Watcher Created -SourceIdentifier FileCreated -Action { 
    $path = $Event.SourceEventArgs.FullPath 
    $name = $Event.SourceEventArgs.Name 
    $changeType = $Event.SourceEventArgs.ChangeType 
    $timeStamp = $Event.TimeGenerated 
    Write-Host "The file '$name' was $changeType at $timeStamp" 
    Write-Host $path 
} 

Answer 1

雖然有可能不是一個Get-ObjectEvent有是一個Get-EventSubscriber。

Get-EventSubscriber | Unregister-Event 

此外，事件訂閱是流程本地的，因此終止PowerShell流程也會刪除其中的訂閱。