在Powershell中递归重命名文件

问题描述

调用此 powershell 命令并出现错误.快把我逼疯了.

Calling this powershell command and getting an error. Driving me nuts.

Prompt> get-childitem -recurse ./ *NYCSCA* |  where-object { $_.Name -like
 "*NYCSCA*" } |  rename-item $_ -newname $_.Name.Replace(" ","_") -whatif

回复如下:

You cannot call a method on a null-valued expression.
At line:1 char:140
+ get-childitem -recurse ./ *NYCSCA* |  where-object { $_.Name -like "*NYCSCA*" } | select FullName | rename-item $_ -n
ewname $_.Name.Replace <<<< (" ","_") -whatif
    + CategoryInfo          : InvalidOperation: (Replace:String) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull

如果我删除最后一部分，我会得到一个文件列表.有什么线索吗?显然，我还没有使用过 powershell.

If I remove the last part, I get a list of files. Any clues? I have not grocked powershell yet, obviously.

注意:我试图将此发布给超级用户，但该网站现在一直在失败 - 不会让我添加这个确切的问题.

Note: I tried to post this to superuser, but the site is consistently failing now - won't let me add this exact question.

这里大大简化了.我什至无法让这个经典示例发挥作用.

Here it is greatly simplified. I cannot even get this classic example to work.

gci  *NYCSCA*  | ren $_ ($_.Name).Replace("foo","bar")

谢谢@JNK，% 做到了.如果您有兴趣，我需要的解决方案是:

Thank you @JNK, the % did it. The solution I needed is this, in case you're interested:

gci -recurse | where-object{ $_.Name -like "*NYCSCA*"} | %{rename-item $_.FullName $_.FullName.Replace("NYCSCA","SDUSD") }

推荐答案

我认为你需要 foreach-object:

I think you need foreach-object:

get-childitem -recurse ./ *NYCSCA* |  where-object { $_.Name -like
 "*NYCSCA*" } | % {rename-item $_ -newname $_.Name.Replace(" ","_") -whatif}

无法将管道数组重命名为集合.

The piped array can't be renamed as a set.

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