中国DOS联盟

In batch files, replacing certain text in file a.txt with other text

for /f "tokens=* delims= " %%i in (a.txt) do (
set n=%%i
set n=!n:aaa=bbb!
echo !n! | find /I "ECHO"
IF ERRORLEVEL 1 (
echo !n! >> temp.txt
) else (
echo. >>temp.txt
)
)
copy temp.txt a.txt

If the string aaa contains spaces or dots ., it cannot be replaced correctly. Is there any expert who has a better solution? Thanks thanks thanks...

set n=!n:aaa=bbb!

You are also a newbie, it seems you are more capable than me
Hehe, if you don't mind, please explain this sentence first

Thanks ^_^

According to the building owner's requirements, basically it cannot be achieved.
I have to add a few more replacement commands. Add all possible combinations in.
I don't know what this is for, what is the final purpose? If it can be more detailed (preferably paste your original file), maybe there is a way.

TO the 2nd floor:
set n=!n:aaa=bbb!
Replace aaa with bbb in variable n

@echo off & setlocal EnableDelayedExpansion
for /f  "tokens=* delims=" %%i in ("Hello world.") do (
    set n=%%i
    set n=!n:ld.=t!
    set n=!n:o w= S!
    set n=!n:He=Wi!
    echo !n!
)

致黛安：

set的字符串替换支持句点和空格，请测试以下示例，正常情况下应该显示出我的英文name。你的问题应该与a.txt中的其他内容有关。

另外，echo!n!到以下几句，可使用一句echo.!n! >> temp.txt等同替换。

@echo off & setlocal EnableDelayedExpansion
for /f  "tokens=* delims=" %%i in ("Hello world.") do (
    set n=%%i
    set n=!n:ld.=t!
    set n=!n:o w= S!
    set n=!n:He=Wi!
    echo !n!
)

Hehe, thanks for chenall's explanation. But it seems that brother willsort's is more clear and understandable. Always admired you a lot

Oh, this is really confusing. What on earth is!n!?

Learned something, thanks willsort

Why can the sentence `echo.!n! >> temp.txt` be used to determine and delete echo?

Why can echo.!n! >> temp.txt determine that echo is an illegal character and delete it?

And the original spaces in the result are gone now, how to keep the spaces?

And the "!" cannot be retained, what to do?

Last edited by xielei198210 on 2007-4-23 at 03:34 PM ]

Dealing with special characters in p is still quite troublesome.

『Thread Starter』: Using a for loop for text replacement, some special characters cannot be replaced. Need help!

In a batch file, replace some text in file a.txt with other text
for /f "tokens=* delims= " %%i in (a.txt) do (
set n=%%i
set n=!n:aaa=bbb!
echo !n! | find /I "ECHO"
IF ERRORLEVEL 1 (
echo !n! >> temp.txt
) else (
echo. >>temp.txt
)
)
copy temp.txt a.txt

If the string aaa contains spaces or dots ., it cannot be replaced correctly. Is there any great god with a better solution? Thanks thanks thanks
TO 2nd floor:
set n=!n:aaa=bbb!
Replace aaa with bbb in variable n


@echo off & setlocal EnableDelayedExpansion
for /f "tokens=* delims=" %%i in ("Hello world.") do (
set n=%%i
set n=!n:ld.=t!
set n=!n:o w= S!
set n=!n:He=Wi!
echo !n!
)

Ask about the previous back: For such code that requires DOS command extensions support with setlocal EnableDelayedExpansion, can it run in a non-Windows environment like DOS 7.1?