如果 FINDSTR 找不到字符串，如何有条件地采取行动 [英] How to conditionally take action if FINDSTR fails to find a string

问题描述

我有一个如下的批处理文件；

I have a batch file as follows;

CD C:MyFolder
findstr /c:"stringToCheck" fileToCheck.bat
IF NOT XCOPY "C:OtherFolderfileToCheck.bat" "C:MyFolder" /s /y

我在尝试执行此操作时收到错误(此时C:OtherFolderfileToCheck.bat"是意外的.).

I am getting an error ("C:OtherFolderfileToCheck.bat" was unexpected at this time.) when trying to execute this.

请告诉我我做错了什么.

Please let me know what I am doing wrong.

推荐答案

您不是在评估 IF 的条件.如果您在 fileToCheck 中找到 stringToCheck，我猜您不想复制.你需要做一些类似的事情(代码未经测试，但你明白了):

You are not evaluating a condition for the IF. I am guessing you want to not copy if you find stringToCheck in fileToCheck. You need to do something like (code untested but you get the idea):

CD C:MyFolder
findstr /c:"stringToCheck" fileToCheck.bat
IF NOT ERRORLEVEL 0 XCOPY "C:OtherFolderfileToCheck.bat" "C:MyFolder" /s /y

dbenham 编辑
上面的测试是错误的，它总是评估为 FALSE.
正确的测试是 IF ERRORLEVEL 1 XCOPY ...

更新:我无法测试代码，但我不确定如果 findstr 没有找到任何内容，它实际返回的返回值是什么.您可能需要执行以下操作:

Update: I can't test the code, but I am not sure what return value findstr actually returns if it doesn't find anything. You might have to do something like:

CD C:MyFolder
findstr /c:"stringToCheck" fileToCheck.bat > tempfindoutput.txt
set /p FINDOUTPUT= < tempfindoutput.txt
IF "%FINDOUTPUT%"=="" XCOPY "C:OtherFolderfileToCheck.bat" "C:MyFolder" /s /y
del tempfindoutput.txt

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