在命令行中执行以下命令时:

for /f %%i in ('application arg0 arg1') do set VAR=%%i

我得到了错误:

%%i was unexpected at this time.

为了解决这个问题，我改为使用一个%符号，就像这样:

for /f %i in ('application arg0 arg1') do set VAR=%i

简介:

在批处理文件中使用%% 在批处理文件之外使用%(在命令行上)

这个答案可能也有帮助:https://stackoverflow.com/a/61666083/2444948

但它实际上是在写一个文件来读取它… 代码不是我写的:

(cmd & echo.) >2 & (set /p =)<2

REM Example :
(echo foo & echo.) >2 & (set /p bar=)<2

@echo off
SETLOCAL ENABLEDELAYEDEXPANSION

REM Prefer backtick usage for command output reading:
REM ENABLEDELAYEDEXPANSION is required for actualized
REM  outer variables within for's scope;
REM within for's scope, access to modified 
REM outer variable is done via !...! syntax.

SET CHP=C:\Windows\System32\chcp.com

FOR /F "usebackq tokens=1,2,3" %%i IN (`%CHP%`) DO (
    IF "%%i" == "Aktive" IF "%%j" == "Codepage:" (
        SET SELCP=%%k
        SET SELCP=!SELCP:~0,-1!
    )
)
echo actual codepage [%SELCP%]

ENDLOCAL

我写了脚本，每5秒ping google.com，并记录当前时间的结果。在这里你可以找到变量“commandLineStr”的输出(带索引)

@echo off

:LOOPSTART

echo %DATE:~0% %TIME:~0,8% >> Pingtest.log

SETLOCAL ENABLEDELAYEDEXPANSION
SET scriptCount=1
FOR /F "tokens=* USEBACKQ" %%F IN (`ping google.com -n 1`) DO (
  SET commandLineStr!scriptCount!=%%F
  SET /a scriptCount=!scriptCount!+1
)
@ECHO %commandLineStr1% >> PingTest.log
@ECHO %commandLineStr2% >> PingTest.log
ENDLOCAL

timeout 5 > nul

GOTO LOOPSTART

一些宏用于将命令的输出设置为变量/

在命令提示符中直接为

c:\>doskey assign=for /f "tokens=1,2 delims=," %a in ("$*") do @for /f "tokens=* delims=" %# in ('"%a"') do @set "%b=%#"

c:\>assign WHOAMI /LOGONID,my-id

c:\>echo %my-id%

带参数的宏

因为这个宏接受参数作为一个函数，我认为它是在批处理文件中使用的最整洁的宏:

@echo off

::::: ---- defining the assign macro ---- ::::::::
setlocal DisableDelayedExpansion
(set LF=^
%=EMPTY=%
)
set ^"\n=^^^%LF%%LF%^%LF%%LF%^^"

::set argv=Empty
set assign=for /L %%n in (1 1 2) do ( %\n%
   if %%n==2 (%\n%
      setlocal enableDelayedExpansion%\n%
      for /F "tokens=1,2 delims=," %%A in ("!argv!") do (%\n%
         for /f "tokens=* delims=" %%# in ('%%~A') do endlocal^&set "%%~B=%%#" %\n%
      ) %\n%
   ) %\n%
) ^& set argv=,

::::: -------- ::::::::


:::EXAMPLE
%assign% "WHOAMI /LOGONID",result
echo %result%

FOR /F宏

不像前面的宏那么容易读。

::::::::::::::::::::::::::::::::::::::::::::::::::
;;set "{{=for /f "tokens=* delims=" %%# in ('" &::
;;set "--=') do @set ""                        &::
;;set "}}==%%#""                               &::
::::::::::::::::::::::::::::::::::::::::::::::::::

:: --examples

::assigning ver output to %win-ver% variable
%{{% ver %--%win-ver%}}%
echo 3: %win-ver%


::assigning hostname output to %my-host% variable
%{{% hostname %--%my-host%}}%
echo 4: %my-host%

宏使用临时文件

更容易阅读，它不是那么慢，如果你有一个SSD驱动器，但它仍然创建一个临时文件。

@echo off

:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
;;set "[[=>"#" 2>&1&set/p "&set "]]==<# & del /q # >nul 2>&1" &::
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

chcp %[[%code-page%]]%
echo ~~%code-page%~~

whoami %[[%its-me%]]%
echo ##%its-me%##

/ /设置str = % myvar#: * = % / /这个替换所有“:” " "                                                         //findstr "子网掩码" my_log.txt > my_find.txt//在文件中搜索“字符串”并保存到新文件中 //“>”重制文件，如果使用“>>”添加在旧文件// im建议使用“>”

@echo off
 
ipconfig > my_log.txt
findstr "Subnet Mask" my_log.txt > my_find.txt 
set /p myVar= < my_find.txt 
echo %myVar%

set str=%myVar:*:=%
set str=%str:.= im_dot %
echo %str%

pause