删除项目不删除文件

Question

这是我的PowerShell脚本:

$dir = ([io.fileinfo]$MyInvocation.MyCommand.Definition).DirectoryName

Get-ChildItem -Path .\ -Filter *.png -Recurse -File | Where-Object {$_.Name -match ".+[\]]+.png"} | ForEach-Object {
    echo $_.FullName $(Test-Path $_.FullName)
    Remove-Item $_
    echo $_.FullName $(Test-Path $_.FullName)
}

回声提供实际的文件名,但Test-Path解析为False,并且没有删除任何内容.

Answer 1

因为您的路径包含]由-Path参数(您隐式使用)作为模式的一部分解释的路径.

您应该使用-LiteralPath参数:

$dir = ([io.fileinfo]$MyInvocation.MyCommand.Definition).DirectoryName

Get-ChildItem -Path .\ -Filter *.png -Recurse -File | Where-Object {$_.Name -match ".+[\]]+.png"} | ForEach-Object {
    echo $_.FullName $(Test-Path -LiteralPath $_.FullName)
    Remove-Item -LiteralPath $_
    echo $_.FullName $(Test-Path -LiteralPath $_.FullName)
}

请注意,如果您改为使用原始对象进行管道传输Get-ChildItem,它会自动绑定到-LiteralPath需要考虑的事项:

$dir = ([io.fileinfo]$MyInvocation.MyCommand.Definition).DirectoryName

Get-ChildItem -Path .\ -Filter *.png -Recurse -File | Where-Object {$_.Name -match ".+[\]]+.png"} | ForEach-Object {
    echo $_.FullName $($_ | Test-Path)
    $_ | Remove-Item
    echo $_.FullName $($_ | Test-Path)
}

为了证明这一点:

$dir = ([io.fileinfo]$MyInvocation.MyCommand.Definition).DirectoryName

$fileSample = Get-ChildItem -Path .\ -Filter *.png -Recurse -File | 
    Where-Object {$_.Name -match ".+[\]]+.png"} | 
    Select-Object -First 1


Trace-Command -Name ParameterBinding -Expression { 
    $fileSample.FullName | Test-Path 
} -PSHost  # $fileSample.FullName is a string, still binds to Path

Trace-Command -Name ParameterBinding -Expression { 
    $fileSample | Test-Path 
} -PSHost  # binds to LiteralPath