Windows 10: Bug in massive file extension renaming

I'm found a wrong behavior in changing the file extension for more than one file.

Having selected many file by the standard win10 file browser Win10 v1909, I try to change the extension in one shot by F2 key, by context menu, by Ribbon too.

The regular box on the file name to rename it is opened and I can change/add the extension.

When I press Return, all the selected file are renamed I need to take care just of ext, not about name


The behavior I expect is to see the new extension on all files.
Instead, previous ext is manteined and it is duplicated. The new extension simply discarted.

Esample on two files, selected and pressing F2 on the first one
3.delme
4.delme


Case "A": Changing/sustitution of current ext ".delme" by ".xml", they remains:

3.delme

4.delme

case "B" : Adding the further extension ".xml" to abtain "3.delme.xml", they became:
3.delme.delme
4.delme.delme

Then, I suppose is not possible a massive file renaming for just extensions.

:)

 

Bug: cannot rename the file/dir to a name starting with "."

It's nothing to do with a virus, it's a bug in the Windows Explorer shell, which disappointingly still hasn't been fixed in Windows 10.

File and folder names beginning with a period are commonly used for special purposes, e.g. ".htaccess" file for Apache Web Server, which it is impossible to create from within Windows Explorer due to this bug. In fact, I have 11 such-named folders under
C:\Users\MyUserName, including ".thumbnails" which might be created by Windows itself. If there happened to be some issue which to resolve would mean renaming it to ".thumbnails-bak", it would not be possible in Windows Explorer, though as the OP points out,
it can be done with `move` (or `ren`) from the command prompt.

This bug has been present in all versions of Windows from at least as far back as Windows XP (probably even Windows 95, so 20+ years to fix a bug is quite a long turn around), and almost certainly stems from the option to "Hide extensions for known file
types" (which is set by default) because the test of file/folder name validity is being incorrectly run on the name with the extension stripped - a
completely empty filename is invalid - and the in-place editor works on the filename without extension if the extension is hidden.

Steps to Reproduce (Windows 10; similar for earlier versions of Windows):

• Go to Control Panel > File Explorer Options > View
• Under Files and Folders uncheck "Hide file extensions for known file types", and click OK;
• Start File Explorer, and browse to, say, Documents;
• Right-click, and select New > Folder;
• Type a name beginning with a period, such as ".test" (without quotes) and press return.

Result

A message box with the title 'Rename' and content "You must type a file name" appears, and the folder is instead created with the name "New Folder"

Expected Result

A folder with the name typed is created.

When will this be fixed?

Please don't say the behaviour is 'by design' - if it is, someone got the design wrong, and that needs fixing! It is an irritating inconvenience to have to bring up a DOS box to work around the bug every time.

 

How to rename multiple sorted files while ignoring file extensions

Hi, suggest you play with this (or similar) - free for personal use, donationware.

 

File extension *.docx

Hi Randy,

To change the file extension when saving a document in Word 2013, you may follow the steps below:

• Click on File; then, select Options from the list.
• In the Word Options window, choose Save.
• Under Save files in this format, select *.doc from the list.
• Hit OK button to confirm and save the changes.

If ever your Word 2013 application is not recognizing the changes you have made, you may restart the application; however, if the issue still persists, we suggest that you repair it. To do this, see this
link.

We would appreciate it if you could get back to us and provide us your feedback.