如果在测试文件中找到一个字符串，如何在dos中使find命令失败？

Question

我必须在文本文件中搜索字符串“Failed”，并希望“find”命令失败或者如果找到字符串则返回失败。

Answer 1

findstr /c:"Failed" filename.txt && Echo Failed found || Echo Failed not found

或

findstr /c:"Failed" filename.txt 
If Errorlevel 1 echo Failed not found or file couldn't be read

请参阅findstr /?和if /?。

Findstr 0 = found，1 = not found，2 = file not not read。