FileSystemWatcher可在PowerShell ISE中运行，但无法在运行时运行 [英] FileSystemWatcher works in the PowerShell ISE but not when run

问题描述

我想监视一个文件夹并移动符合某些条件的文件，所以我试图使用FileSystemWatcher.

I want to monitor a folder and move files that match certain criteria, so I'm trying to use the FileSystemWatcher.

我有一个将在每个新文件中调用的函数:

I have a function that will be called with each new file:

function ProcessFile()
{
    param ([string]$filename)
    Write-Host "Processing file '$filename' to $destination"
}

然后我设置了FSW:

Write-Host "Watching $source for new files..."
$fsw = New-Object IO.FileSystemWatcher $source, $filter -Property @{IncludeSubdirectories = $false; NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'}

Register-ObjectEvent $fsw Created -SourceIdentifier FileCreated -Action 
{
    ProcessFile $Event.SourceEventArgs.FullPath 
}

当我从ISE运行它时，效果很好，并且可以正确跟踪我放到监视的文件夹中的所有文件，但是如果我启动PowerShell窗口并使用.\ FileWatch.ps1运行脚本，那么什么都不会发生.

That works fine when I run it from the ISE, and any files I drop into the watched folder are correctly tracked, but if I start a PowerShell window and run the script with .\FileWatch.ps1 then nothing happens.

我看到正在观看..."消息，但从没有看到正在处理..."消息

I see the "watching ..." message, but never see a "processing..." message

这里是可在ISE中运行但不在Shell中运行的完整脚本...

Here's the full script that works in the ISE but not in a shell...

$source = 'D:\Dev\PowerShell\FileWatch\Test\Source'
$filter = '*.*'
$destination = 'D:\Dev\PowerShell\FileWatch\Test\Found\'

function ProcessFile()
{
    param ([string]$filename)
    Write-Host "Processing file '$filename' to $destination"
}

Write-Host "Watching $source for new files..."
$fsw = New-Object IO.FileSystemWatcher $source, $filter -Property @{IncludeSubdirectories = $false; NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'}
Register-ObjectEvent $fsw Created -SourceIdentifier FileCreated -Action {
    ProcessFile $Event.SourceEventArgs.FullPath 
}

推荐答案

问题是您的函数ProcessFile未在Powershell会话中加载.

The problem is that your function ProcessFile isn't loaded in powershell session.

尝试以这种方式加载脚本:

Try loading you script in this way:

. .\myscript.ps1

通过这种方式，您在我的系统中的代码可以正常工作！

In this way your code in my system works!

了解有关 Dot Sourcing Powershell中的脚本.

Read about Dot Sourcing a script in powershell.

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