File Powershell将文件名替换为父文件夹名而不更改文件结尾

我有一个父文件夹，其中有1000多个级别1嵌套文件夹，每个文件夹中有数千个文本文件：

Parent folder ==> Folder1 ==> File1.txt
Parent folder ==> Folder1 ==> File2.txt
Parent folder ==> Folder1 ==> File3.txt
Parent folder ==> Folder2 ==> File1.txt
Parent folder ==> Folder2 ==> File2.txt
Parent folder ==> Folder2 ==> File3.txt
Parent folder ==> Folder3 ==> File1.txt
Parent folder ==> Folder3 ==> File2.txt
Parent folder ==> Folder3 ==> File3.txt

我需要能够使用PowerShell重命名文件，如下所示：

Parent folder ==> Folder1 ==> Folder1_File1.txt
Parent folder ==> Folder1 ==> Folder1_File2.txt
Parent folder ==> Folder1 ==> Folder1_File3.txt
Parent folder ==> Folder2 ==> Folder2_File1.txt
Parent folder ==> Folder2 ==> Folder2_File2.txt
Parent folder ==> Folder2 ==> Folder2_File3.txt
Parent folder ==> Folder3 ==> Folder3_File1.txt
Parent folder ==> Folder3 ==> Folder3_File2.txt
Parent folder ==> Folder3 ==> Folder3_File3.txt

在PowerShell、Windows Server 2012中是否有这样做的方法

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提前感谢。

非常感谢您的快速回复Anthony，我是否需要进行任何循环，或者这是否适用于父文件夹下的所有文件夹和文件？我刚刚添加了-directory。这将直接适用于“文件夹”中的文件夹。创建您的示例文件夹结构以进行测试。非常感谢您的快速回复Anthony，我是否需要进行任何循环，或者这是否适用于父文件夹下的所有文件夹和文件？我刚刚添加了-directory。这将直接适用于“文件夹”中的文件夹。创建示例文件夹结构以进行测试。

dir C:\temp\folder\ -directory | % {dir $_.fullname | % {ren $_.fullname $((split-path (split-path $_.fullname) -leaf) + '_' + $_.name)}}