[网络连接] Bat 如何在批处理的过程中调用文本文件中的随机一行字符串

wodekao

UPDATEDNS.bat

netsh interface ip set dns "以太网" static 8.8.8.8 primary


DNS.txt

114.114.114.114
223.5.5.5
180.76.76.76
119.29.29.29
1.2.4.8
117.50.11.11

需要在运行 UPDATEDNS.bat 的时候  

netsh interface ip set dns "以太网" static 这个地方需要调用DNS.txt中随机的一行内容 primary

附
如果把这些内容
114.114.114.114
223.5.5.5
180.76.76.76
119.29.29.29
1.2.4.8
117.50.11.11
放到UPDATEDNS.bat文件中进行随机调用，如何实现？

idwma

@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%a in (dns.txt) do set/a n+=1
set/a nn=%random%%%!n!+1
set n=
for /f "delims=" %%a in (dns.txt) do (
set/a n+=1
if "n"=="nn" set nnn=%%a&&goto :n
)
:n
netsh interface ip set dns "以太网" static %nnn% primary
pause
复制代码

wodekao

回复 2# idwma

运行错误，提示参数错误，对象已在列表中.

idwma

回复 3# wodekao

@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%a in (dns.txt) do set/a n+=1
set/a nn=%random%%%!n!+1
set n=
for /f "delims=" %%a in (dns.txt) do (
set/a n+=1
if "n"=="nn" set nnn=%%a&&goto :n
)
:n
netsh interface ip delete dnsservers "以太网" all
netsh interface ip set dns "以太网" static %nnn% primary
pause
复制代码