Concatenation of multiple lines of text into a batch with a connected line _dos/bat

Copy Code code as follows:

@echo off
:: Concatenation of multiple lines of text into use;
:: <nul can not be omitted, omitted can not run down
for/f "tokens=*"%%i in (source file. txt) do set/p "var=%%i;" <nul >> destination file. txt
Exit

Another method:
Set tmpstr=
Setlocal enabledelayedexpansion
for/f "tokens=*"%%i in (1.txt) do set tmpstr=!tmpstr! %%i
Echo%tmpstr%
Pause
Exit

There is also a method that does not enable variable delay, and can be compatible with all special characters except the English double citation:
@echo off
:: Code by JM 2006-12-14
for/f "delims="%%i in (1.txt) does call set "Var=%%var%%%%i"
echo "%var%"
Pause