extract string from a environment variable

[graceguo]

I have many environment variables with value like testfilename.txtsomethingelse. The length of somethingelse is not
constant and neither the part before .txt for each of those variables.

I want to remove the string before .txt or the string after .txt of all those variables.

Is there a way to use wildcard to extract the string after .txt?

Can I do somthing like set a=%b:*.txt=%

I know this is not correct, would any experts give some ideas ?

[Sidewinder]

Provided the .txt stays constant, this should work:

Code: [Select]

@echo off
for /f "tokens=1-2 delims=." %%a in ("testfilename.txtsomethingelse") do (
      set var2=%%a
      set var=%%b
      )
set var=%var:~3%      
echo %var2% %var%

For a more robust solution, try Windows Script

Hope this helps. 8-)

Note: you can replace testfilename.txtsomethingelse with any environment variable (surrounded by %); keep the quotes.

[graceguo]

You are really cool  8-)

Thanks very much!