Add parent folder name to file name?

Question

I have this folder structure

root\1\2\3\1.txt
root\3\2\4\6\1.txt

I want to rename text files to root_1.txt I tried

Get-ChildItem -Recurse *.txt | Rename-Item -NewName %{$_.Parent.Parent.Name + $_.Name} 

But this doesn't work because Parent work only for directories

Answer 1

For file items, use the Directory property:

Get-ChildItem -Recurse *.txt | Rename-Item -NewName {$_.Directory.Parent.Name + $_.Name}