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DOS疑难解答 & 问题讨论（解答室） » How to determine whether a certain folder under a certain drive letter exists??? [Help]

Floor1　langhua	Posted 2002-12-07 00:00
银牌会员　Posts 461　Credits 1,225
For example: I want to know whether the C:\ABC folder exists. How should I judge it under DOS? Does IF EXIST only judge files and not folders?

Floor3　langhua	Posted 2002-12-07 00:00
银牌会员　Posts 461　Credits 1,225
I'll try!!! It worked! Haha! Thank you, moderator!!

Floor4　langhua	Posted 2002-12-07 00:00
银牌会员　Posts 461　Credits 1,225
Still need to trouble you!!! /NUL What does this parameter mean?

Floor5　yiyesong	Posted 2002-12-07 00:00
元老会员　Posts 632　Credits 1,987
In fact, you can also use IF EXIST C:\abc\. or IF EXIST C:\abc\. In addition, the software LOCATE is the most powerful for finding directories and files.

Floor7　langhua	Posted 2002-12-07 00:00
银牌会员　Posts 461　Credits 1,225
*The following is a quote from yiyesong* on December 7, 2002 at 1:57:33:** In fact, you can also use IF EXIST C:\abc\. or IF EXIST C:\abc\. In addition, the software LOCATE is the most powerful for finding directories and files. It doesn't work!! The above is only effective when there are files in the directory It has no effect on empty directories!!!! /NUL can judge empty directories!!! So please talk about./NUL.... Thank you!

Floor8　Wengier	Posted 2002-12-07 00:00
系统支持　Posts 10,521　Credits 27,736
In pure DOS, ABC\. may not be effective when there are no files, but it is effective under DOS32. NUL is used to determine whether the null device exists.