batch file to search in txt file for string and get the full line off the string

Question

i want batch file to search in txt file for string and get full line of it

this is the txt file input

1:how are you

3:im fine

2:yeah

     for example
     @echo off
     set string=3:
     echo the full line off the string is %fullline%
     pause

Answer 1

here is a batch file that calls findstr directly, and within a for loop to add text to the line. if you just want the found text delete the line beginning with for.

@echo off

set findtext="blah"
set findfile="test.txt"

findstr %findtext% %findfile%

for /f "delims=" %%a in ('findstr %findtext% %findfile%') do echo The full line of the string is %%a

credits