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中国DOS联盟论坛 » DOS学习入门 & 精彩文章 （教学室） » [Help] About dready? View 1,126　Replies 7
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Original Poster Posted 2003-07-28 00:00　·　 中国 广东 肇庆 电信
hzy
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When the drive does not exist, why can't it jump to :error like this?

set get=
get s "inupt drive letter please : "
dready %get% /W
IF NOT ERRORLEVEL 0 goto error
echo drive OK !
goto .............................
:error
echo drive not ready or read-only
-----------------------------------------------------------------------------
It only works if written like this instead. Why?

set get=
get s "inupt drive letter please : "
dready %get% /W
IF ERRORLEVEL 1 goto error
IF ERRORLEVEL 2 goto error
IF ERRORLEVEL 255 goto error
echo drive OK !
goto .............................
:error
echo drive not ready or read-only

Floor 2 Posted 2003-07-28 00:00　·　 中国 香港
Roy
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Because Errorlevel is not exact. For example, if Errorlevel is 5, that means errorlevel is equal to 0 through 5.
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Floor 3 Posted 2003-07-28 00:00　·　 中国 广东 肇庆 电信
hzy
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Then is it okay if I write it like this?

set get=
get s "inupt drive letter please : "
dready %get% /W
IF ERRORLEVEL 1 IF ERRORLEVEL 2 IF ERRORLEVEL 255 goto error
echo drive OK !
goto .............................
:error
echo drive not ready or read-only




Floor 4 Posted 2003-07-28 00:00　·　 中国 北京 科技网
hunome
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It should be okay, I guess. Just try it yourself and you'll know.
Floor 5 Posted 2003-07-28 00:00　·　 中国 北京 科技网
hunome
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Feels like it still won't work.
Floor 6 Posted 2003-07-31 00:00　·　 美国 肯塔基州 费耶特县 列克星敦 Charter_Communications
Wengier
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NO NO NO!

IF ERRORLEVEL 1 means when the value of ERRORLEVEL is >=1 (greater than or equal to 1), not <=1.
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Floor 7 Posted 2003-08-01 00:00　·　 中国 广东 肇庆 电信
hzy
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Many thanks
Floor 8 Posted 2004-04-21 00:00　·　 中国 内蒙古 赤峰 联通
蓝雨v21
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This is exactly what I was looking for!
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