问题
When I enabled DelayedExpansion in the script, it doesn't echo out the "!" string in the file name. For instance:
Original
File01-TEXT!.txtEcho out
File01-TEXT.txt
I guess it's because of the setlocal EnableDelayedExpansion
, but I can't remove because I need it.
@echo off
setlocal EnableDelayedExpansion
cd "C:\Files"
for %%a in (*.txt) do (
REM Here's the problem...
echo %%a
set "str=%%a"
set new_str=!str:0,3!
)
echo %new_string%
pause >nul
回答1:
Depending on the real code, you can work with delayed expansion disabled, enable it where access to modified content is needed and then disable again
@echo off
setlocal enableextensions disabledelayedexpansion
cd "C:\Files"
for %%a in (*.txt) do (
set "str=%%a"
rem Option 1
echo file: %%a
setlocal enabledelayedexpansion
echo substring: !str:~0,3!
endlocal
rem Option 2 - capture changed value to use inside non delayed expansion context
setlocal enabledelayedexpansion
for %%b in ("!str:~0,3!") do (
enlocal
echo %%a -- %%~b
)
)
来源:https://stackoverflow.com/questions/33257824/missing-string-when-enabledelayedexpansion