if-statement - 如果存在 C :\directory\goto a else goto b problems windows XP batch files

Question

每当我运行 code下面它发生在我身上，我在使用 if 存在行时犯了一个错误，因为无论目录是否存在，它都表现为该行从未存在过......

echo off  
echo  
echo (c) Ryan Leach 2010  
echo Stockmaster Backup System for exclusive use of Riverland Paper Supplies  
echo  
echo Please ensure that all computers are out of stock master to the windows xp screen  
echo and that the backup usb with the day of the week labeled on it is inserted  

pause  

IF EXIST D:\RPS_BACKUP\backups_to_zip\ goto zipexist else goto zipexistcontinue  
:zipexist  
IF EXIST d:\RPS_BACKUP\backups_old\ rd /s /q D:\RPS_BACKUP\backups_old  
echo backup did not complete last time, backup will restart from zip-usb phase.  
pause  
call zip  
goto tidyup  
:zipexistcontinue  

IF EXIST D:\RPS_BACKUP\backups_old\ goto oldexists else oldexistscontinue  
:oldexists  
IF EXIST d:\RPS_BACKUP\backup_temp\ rename D:\RPS_BACKUP\backups_temp backups_to_zip  
rd /s /q D:\RPS_BACKUP\backups_old  
echo backup did not complete last time, backup will restart at the zip to usb phase.  
pause  
call zip  
goto tidyup  
:oldexistscontinue  

IF EXIST D:\RPS_BACKUP\backups_temp\ goto tempexists else goto tempexistscontinue  
:tempexists  
IF EXIST D:\RPS_BACKUP\backups_old\ goto backupfailed else goto tempexistscontinue  
:backupfailed  
@rd /s /q D:\RPS_BACKUP\backups_temp  
echo backup did not complete last time, backup will restart from start.  
pause  
:tempexistscontinue  

md D:\RPS_BACKUPS\backups_temp  
xcopy \\user1\c\* D:\RPS_BACKUP\backups_temp\user1\c /h /e /z /f /r /i /s /k  
IF NOT ERRORLEVEL == 1 GOTO ErrorHandler  
xcopy C:\* D:\RPS_BACKUP\backups_temp\user2\c /h /e /f /r /i /s /k  
IF NOT ERRORLEVEL == 1 GOTO ErrorHandler  
xcopy \\user3\c\* D:\RPS_BACKUP\backups_temp\user3\c /h /e /z /f /r /i /s /k  
IF NOT ERRORLEVEL == 1 GOTO ErrorHandler  
call sub  
call zip  
:tidyup  
rename D:\RPS_BACKUP\backups_to_zip backups  
pause  
goto :eof  

:ErrorHandler  
echo xcopyerrorcode is ERRORLEVEL contact ryan  
pause  

Answer 1

使用括号对各个分支进行分组:

IF EXIST D:\RPS_BACKUP\backups_to_zip\ (goto zipexist) else goto zipexistcontinue

在您的情况下，解析器永远不会看到 else属于 if因为 goto将愉快地接受直到命令结束的所有内容。使用 echo 时您会看到类似的问题而不是 goto .

还使用括号将允许您直接使用语句而无需跳转(尽管我无法重写您的代码以实际使用结构化编程技术；也许为时过早，或者它不适合块结构作为代码是现在)。