判断DNS并自动切换

@echo off
 CLS
 ECHO.
 :init
 setlocal DisableDelayedExpansion
 set "batchPath=%~0"
 for %%k in (%0) do set batchName=%%~nk
 set "vbsGetPrivileges=%temp%\OEgetPriv_%batchName%.vbs"
 setlocal EnableDelayedExpansion
 :checkPrivileges
 NET FILE 1>NUL 2>NUL
 if '%errorlevel%' == '0' ( goto gotPrivileges ) else ( goto getPrivileges )
 :getPrivileges
 if '%1'=='ELEV' (echo ELEV & shift /1 & goto gotPrivileges)
 ECHO.
 ECHO Set UAC = CreateObject^("Shell.Application"^) > "%vbsGetPrivileges%"
 ECHO args = "ELEV " >> "%vbsGetPrivileges%"
 ECHO For Each strArg in WScript.Arguments >> "%vbsGetPrivileges%"
 ECHO args = args ^& strArg ^& " " >> "%vbsGetPrivileges%"
 ECHO Next >> "%vbsGetPrivileges%"
 ECHO UAC.ShellExecute "!batchPath!", args, "", "runas", 1 >> "%vbsGetPrivileges%"
 "%SystemRoot%\System32\WScript.exe" "%vbsGetPrivileges%" %*
 exit /B
 :gotPrivileges
 setlocal & pushd .
 cd /d %~dp0
 if '%1'=='ELEV' (del "%vbsGetPrivileges%" 1>nul 2>nul & shift /1)
 ::判断本地连接 赋值a
 for /f "tokens=2,3" %%i in ('ipconfig /all^|findstr /r "以太网适配器"') do echo %%i %%j >net-name.txt
 for /f "tokens=1 delims==:" %%d in (net-name.txt) do set a=%%d

::判断当前DNS 赋值c
 for /f "tokens=15" %%i in ('ipconfig /all^|findstr /r "DNS"') do echo %%i >DNS.txt
 for /f "tokens=1 delims==." %%h in (DNS.txt) do set c=%%h

::比较当前DNS
 if "%c%"=="8" (goto ToAliDNS) else ( if "%c%"=="223" ( goto ToGoogleDNS ))

::请根据实际情况更改以下内容
 :ToGoogleDNS
 echo Google DNS
 color 1A
 echo ***
 echo 正在修复，请稍后…….
 echo ***
 netsh interface ip set dns name="%a%" source=static addr=8.8.4.4
 netsh interface ip add dns "%a%" 8.8.8.8
 goto EXIT

:ToAliDNS
 echo ALI DNS
 color 1A
 echo ***
 echo 正在修复，请稍后…….
 echo ***
 netsh interface ip set dns name="%a%" source=static addr=223.5.5.5
 netsh interface ip add dns "%a%" 223.6.6.6
 goto EXIT

:EXIT
 ipconfig /flushdns
 echo *
 ipconfig /flushdns
 echo *
 ipconfig /flushdns
 del net-name.txt
 del DNS.txt
 echo *
 echo 修复已完成，祝您游戏愉快
 echo *
 echo 请按任意键退出
 echo **
 pause
 exit