"Small Function" to Read Specific Lines of a File (ReadLine2.bat) - China DOS Union Forum

　　Modified based on ReadLine.bat to read specific lines from a file.

　　The usage is also relatively simple. Add "Call ReadLine2.bat <file name> <line number to read>" in the batch script. For example: "Call ReadLine2 system.ini 11 5 7 9" can read lines 5, 7, 9, and 11 of the system.ini file. The line numbers behind do not have a strict order of size. But the efficiency is not very high, and it is still acceptable for reading small files.

ReadLine2.bat @echo off&SetLocal ENABLEDELAYEDEXPANSION :::::::::::ReadLine2.Bat:::::::::::::::::: if "%1"=="" (goto --help) else (set file=%1) if not exist %file% goto :eof if "%2"=="" ( for /f "tokens=1* delims=:" %%a in ('findstr /n .* "%file%"') do echo/%%b goto :eof ) else ( set args=%* for %%a in (!args!) do ( if not "%%a"=="%1" (for /f "tokens=1* delims=:" %%b in ('findstr /n .* "%file%"') do ( if "%%b"=="%%a" echo/%%c) ) ) ) goto :eof :--help echo/====================================== echo/This program segment needs parameters to run normally echo/&echo/Usage:&echo/Call ReadLine2 ^<file name^> ^<line number to read^> echo/&echo/For example: Call ReadLine2 aa.txt 5 7 11, which will read lines 5, 7, 11 of the aa.txt file echo/&echo/If ^<line number to read^> is not specified, the entire content of the file will be read echo/====================================== goto :eof

Floor1　lxmxn	Posted 2007-03-20 03:34
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Modified based on ReadLine.bat to read specific lines from a file. 　　The usage is also relatively simple. Add "Call ReadLine2.bat <file name> <line number to read>" in the batch script. For example: "Call ReadLine2 system.ini 11 5 7 9" can read lines 5, 7, 9, and 11 of the system.ini file. The line numbers behind do not have a strict order of size. But the efficiency is not very high, and it is still acceptable for reading small files. ReadLine2.bat @echo off&SetLocal ENABLEDELAYEDEXPANSION :::::::::::ReadLine2.Bat:::::::::::::::::: if "%1"=="" (goto --help) else (set file=%1) if not exist %file% goto :eof if "%2"=="" ( for /f "tokens=1* delims=:" %%a in ('findstr /n .* "%file%"') do echo/%%b goto :eof ) else ( set args=%* for %%a in (!args!) do ( if not "%%a"=="%1" (for /f "tokens=1* delims=:" %%b in ('findstr /n .* "%file%"') do ( if "%%b"=="%%a" echo/%%c) ) ) ) goto :eof :--help echo/====================================== echo/This program segment needs parameters to run normally echo/&echo/Usage:&echo/Call ReadLine2 ^<file name^> ^<line number to read^> echo/&echo/For example: Call ReadLine2 aa.txt 5 7 11, which will read lines 5, 7, 11 of the aa.txt file echo/&echo/If ^<line number to read^> is not specified, the entire content of the file will be read echo/====================================== goto :eof

Floor2　baomaboy	Posted 2007-03-20 03:51
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Floor3　HUNRYBECKY	Posted 2007-03-20 21:33
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Moderator lxmxn, why did you post in two places? For the convenience of management, it is suggested to move it under the original ReadLine1.bat. Thanks

Floor4　lxmxn	Posted 2007-03-20 23:17
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Originally posted by HUNRYBECKY at 2007-3-20 08:33: Why did the moderator lxmxn post the same content in two places? For the convenience of management, it is suggested to move it to the original ReadLine1.bat. Thanks 　　Isn't this called "posting in two places"? 　　Although both are used to read specified lines of a file, their specific functions are different. One is to read consecutive lines, and the other is to read specific lines, and the effects are also different.

Floor6　z060053	Posted 2008-07-25 14:07
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@echo off setlocal EnableDelayedExpansion set loop=0 set /a skipline=%2-1 for /f "tokens=1 skip=%skipline% delims=" %%a in (%1) do ( set /a loop=!loop!+1 if "!loop!" leq "%3" (echo %%a) else goto :eof ) goto :eo

Floor5　29984365	Posted 2007-04-07 04:42
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