How can I Delete Files That Do Not Contain Certain Characters Using Windows Batch File?

Question

How can I delete files that do not end with the pattern .PDF_*.pdf ?

AA00A6E2.PDF
AA00A6E3.PDF
AA00A6E3.PDF_01.pdf
AA00A6E3.PDF_02.pdf
AA00A6E3.PDF_03.pdf

I have been trying all sorts of variations around the following syntax:

FOR %%F IN (%varFolderSource%\*.*) DO IF NOT "%%~xF" == "*_*" DEL /F /S "%%F"

But I can't seem to crack it.

%varFolderSource% is a folder path: C:\Temp etc.

I am running this in a Windows 7 batch file.

Answer 1

For /f "delims=" %A in ('dir /b /a-d ^|findstr /i /v /e /r "\.PDF_[a-z0-9]*\.pdf"') do echo %A

Type

for /?
findstr /?

In a batch file use %%A rather than %A at command prompt.