如何将批处理文件写入 return WMIC 结果

Question

如果主板制造商是 ASUSTek COMPUTER INC.，如何将批处理文件写入 return true，如果不使用 wmic 命令，如何将批处理文件写入 return false？

命令如下：

wmic baseboard get Manufacturer

它 returns:

Manufacturer
ASUSTeK COMPUTER INC.

而我只需要比较字符串ASUSTeK COMPUTER INC..

Answer 1

要捕获 wmic 命令的输出，请使用 for /F:

set "BOARD="
for /F "skip=1 delims=" %%I in ('
    wmic BaseBoard get Manufacturer
') do (
    for /F "delims=" %%J in ("%%I") do (
        set "BOARD=%%J"
    )
)
rem // Compare retrieved string:
if /I "%BOARD%"=="ASUSTeK COMPUTER INC." (
    echo True
) else (
    echo False
)

两个嵌套的 for /F 循环是正确转换 Unicode wmic 输出所必需的。

但是，您也可以直接过滤 wmic 输出，如下所示：

wmic BaseBoard where "Manufacturer='ASUSTeK COMPUTER INC.'" get Manufacturer 2>&1 > nul | find /V "" > nul && (echo False) || (echo True)

where clause does the filtering; if no match is found, No Instance(s) Available. is returned on the STD_ERR stream (handle 2). The expression 2>&1 > nul suppresses the STD_OUT stream (handle 1) and redirects STD_ERR to STD_OUT instead, so find is going to receive it; the search expression /V "" finds a match when the stream is not empty. find returns an exit code of 0 if a match is found and 1 otherwise; the operators && 和 || 检查退出代码并有条件地执行相应的 echo 命令。

如何将批处理文件写入 return WMIC 结果

How to write a batch file to return a WMIC result

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batch-file

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