好用的 cmd 指令 (01)

最近在工作上有接觸 cmd 指令
這邊記一下好用的東西
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if + findstr using
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findstr "string" file
if errorlevel 1 (
    echo String NOT found...
) else (
    echo String found
)
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Example for findstr
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F:\test>findstr /v "black white" blackwhite.txt

red
blue

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F:\test>findstr "black white" blackwhite.txt

black
white
black white
black and white

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F:\test>findstr /c:"black white" blackwhite.txt

black white

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F:\test>findstr "white" blackwhite.txt | findstr "black"

black white
black and white

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findstr + errorlevel code
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findstr /C:FFFF info_1.hex
IF ERRORLEVEL 1 goto NOT_MATCH
echo MATCH
goto END