Powershell重命名项无法重命名 [英] powershell Rename-Item fail to rename

问题描述

我的powershell脚本:

My powershell script:

$dst = 'C:\Temp'

#Get all folders in $dst
$folders = Get-ChildItem $dst | ?{ $_.PSIsContainer }

foreach($folder in $folders)
{
    $cnt = (Get-ChildItem -filter *.txt $folder | Measure-Object).Count

    $base = ($folder.FullName -split " \[.*\]$")[0]
    $newname = $("{0} [{1}]" -f $base,$cnt)

    Write-Host $folder.FullName "->" $newname

    Rename-Item $folder.FullName $newname
}

问题

在我的第一次跑步中，我得到了:

On my first run I get this:

PS C:\Temp> C:\Temp\RenameFolders.ps1
C:\Temp\m1 -> C:\Temp\m1 [1]

在第二次跑步中，我得到了:

On my second run I get this:

PS C:\Temp> C:\Temp\RenameFolders.ps1
C:\Temp\m1 [1] -> C:\Temp\m1 [0]
Rename-Item : Cannot rename because item at 'C:\Temp\m1 [1]' does not exist.
At C:\Temp\RenameFolders.ps1:15 char:5
+     Rename-Item $folder.FullName $newname
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [Rename-Item], PSInvalidOperationException
    + FullyQualifiedErrorId : InvalidOperation,Microsoft.PowerShell.Commands.RenameItemCommand

我知道问题出在'['和']'，但我真的不明白为什么.

I know that the problem is in '[' and ']', but I realy can't understand why.

有人可以向我解释为什么这是个问题吗?

Can someone explain me why is that a problem?

推荐答案

如果您正在运行PS 3+，请添加 -LiteralPath 开关以重命名:

If you are running PS 3+ add -LiteralPath switch to your rename:

Rename-Item -LiteralPath $folder.FullName $newname

否则使用Move-Item

Move-Item -LiteralPath $folder.FullName $newname

Powershell不喜欢文件名中的方括号，更多内容请参见以下

Powershell doesn't like square brackets in filenames, more in the following post:

当V2将方括号添加到通配符集以支持"blobing"时，这成为一个问题.

This became an issue with V2 when they added the square brackets to the wildcard character set to support "blobbing".

来自get-help about_wildcards:

Windows PowerShell支持以下通配符.

Windows PowerShell supports the following wildcard characters.

通配符描述示例匹配项不匹配

Wildcard Description Example Match No match

• 匹配0或a * A，ag，Apple香蕉 更多字符

• Matches zero or a* A, ag, Apple banana more characters

?完全匹配?一次 一个字符 指定的 位置

? Matches exactly ?n an, in, on ran one character in the specified position

[]匹配范围[a-l]看书，做饭，看 字符

[ ] Matches a range [a-l]ook book, cook, look took of characters

[]匹配指定的[bc]钩书，厨师钩 字符

[ ] Matches specified [bc]ook book, cook hook characters

[和]是特殊字符.

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