如何仅在测试文件中的一行中分配 FOR /F 标记？

发布于 2024-12-01 06:49:15 字数 268 浏览 2 评论 0原文

如何使其仅从 .txt 文件中的第一行获取令牌，而不是循环遍历每一行。我希望将 %%m 分配给第一行的第三个标记，然后停止。

@echo off
FOR %%A IN (.\xdrive\*.txt) DO (
  FOR /F "usebackq tokens=3 delims=," %%m IN ("%%A") DO (
    IF "%%m" == "F01" (xcopy /Y "%%A" .\Outbound)
    pause
  )
)
pause

原文

How do I make this grab the token from the first line ONLY in .txt file instead of looping through every line. I want %%m to be assigned to the 3rd token on line one only then stop.

@echo off
FOR %%A IN (.\xdrive\*.txt) DO (
  FOR /F "usebackq tokens=3 delims=," %%m IN ("%%A") DO (
    IF "%%m" == "F01" (xcopy /Y "%%A" .\Outbound)
    pause
  )
)
pause

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梦幻的心爱 2024-12-08 06:49:15

set /p 可以用来读取第一行，然后可以使用 FOR /F 循环来获取第三个标记

setlocal EnableDelayedExpansion
FOR %%A IN (%1) DO (
    <%%A set /p firstline=
    FOR /F "tokens=3 delims=," %%m IN ("!firstline!") DO (
        echo %%m
    )
)

set /p can be used to read the first line, and then you can use a FOR /F loop to get the third token

setlocal EnableDelayedExpansion
FOR %%A IN (%1) DO (
    <%%A set /p firstline=
    FOR /F "tokens=3 delims=," %%m IN ("!firstline!") DO (
        echo %%m
    )
)

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酒几许 2024-12-08 06:49:15

如果没有看到eg文件并且确切地知道你想要做什么，我无法测试这个，但这里是 firstline.bat 的列表，它应该满足你的要求:)首先我认为这需要比实际情况更复杂......在第一次调用之后，如果简单地使用 goto 退出 for 结构 - 问题解决了吗？

@echo off

::: firstline.bat - Retrieve the first line from a series of files
:::  usage: firstline $filespec
:::     filespace - files to process (eg .\xdrive\*.txt)
if "%~1"=="" findstr "^:::" "%~f0"&GOTO:EOF

FOR %%A IN (%1) DO (
  call :testfirst "%%A"
)
goto :eof

:testfirst
FOR /F "usebackq tokens=3 delims=," %%m IN (%1) DO (
  IF "%%m" == "F01" (xcopy /Y %1 .\Outbound)
  goto:eof
)

Without see the eg files and knowing exactly what you're trying to do I can't test this, but here's the listing of firstline.bat which should do what you're asking for :) At first I thought this needed to be more complicated than it is... after your first if simply use a goto to exit the for structure after it's first call - problem solved?

@echo off

::: firstline.bat - Retrieve the first line from a series of files
:::  usage: firstline $filespec
:::     filespace - files to process (eg .\xdrive\*.txt)
if "%~1"=="" findstr "^:::" "%~f0"&GOTO:EOF

FOR %%A IN (%1) DO (
  call :testfirst "%%A"
)
goto :eof

:testfirst
FOR /F "usebackq tokens=3 delims=," %%m IN (%1) DO (
  IF "%%m" == "F01" (xcopy /Y %1 .\Outbound)
  goto:eof
)

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飞烟轻若梦 2024-12-08 06:49:15

请参阅这篇文章，其中展示了如何使用 dos 批处理文件模拟 gnu head 实用程序：

Windows 批处理命令从文本文件读取第一行

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云淡月浅 2024-12-08 06:49:15

未经测试的

读取第一行标记3

for /f "tokens=3 delims=," %%a in ('"findstr /n . %1|findstr /b 1:"') do set fltok3=%%a
echo(%fltok3%

untested

read first line tokens3

for /f "tokens=3 delims=," %%a in ('"findstr /n . %1|findstr /b 1:"') do set fltok3=%%a
echo(%fltok3%

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病女 2024-12-08 06:49:15

Hackish =

@echo off
FOR %%A IN (.\xdrive\*.txt) DO (
  FOR /F "usebackq tokens=3 delims=," %%m IN ("%%A") DO (
    IF "%%m" == "F01" (xcopy /Y "%%A" .\Outbound)
    GOTO:EOF
  )
)

所以你所做的就是在第一遍之后逃避循环，而不是继续下一行。

Hackish =

@echo off
FOR %%A IN (.\xdrive\*.txt) DO (
  FOR /F "usebackq tokens=3 delims=," %%m IN ("%%A") DO (
    IF "%%m" == "F01" (xcopy /Y "%%A" .\Outbound)
    GOTO:EOF
  )
)

So all you're doing is escaping the loop after the first pass instead of continuing onto the next line.

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眼眸 2024-12-08 06:49:15

该代码读取文件“fileread.txt”的第2行（lineforread），
要更改要读取的行，只需更改 lineforread 变量的值即可。

@set STDERRZ=fileread.txt
@setlocal EnableDelayedExpansion
@set lineforread=2
@echo off
echo Line %lineforread% for %STDERRZ%
@FOR /F "tokens=*" %%F IN ('more +%lineforread% %STDERRZ%') do (
@SET conteudo=%%F 
goto end)
:end
echo %conteudo%
PAUSE

The code read the line 2 (lineforread) of the file "fileread.txt",
To change the line to read just change the value of the lineforread variable.

@set STDERRZ=fileread.txt
@setlocal EnableDelayedExpansion
@set lineforread=2
@echo off
echo Line %lineforread% for %STDERRZ%
@FOR /F "tokens=*" %%F IN ('more +%lineforread% %STDERRZ%') do (
@SET conteudo=%%F 
goto end)
:end
echo %conteudo%
PAUSE

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~没有更多了~