WMI 查询以确定没有空条目的 DNS 服务器 [英] WMI Query to determine DNS Servers without null entries

问题描述

我可以使用以下 WMI 查询来确定我的机器可能正在使用的任何 DNS 服务器:

I can use the following WMI query to determine any DNS servers my machine might be using:

SELECT DNSServerSearchOrder
FROM Win32_NetworkAdapterConfiguration

但是，我为忽略空条目而编写的以下查询无效，我不知道为什么:

However, the following query I wrote to ignore null entries is invalid and I don't know why:

SELECT DNSServerSearchOrder
FROM Win32_NetworkAdapterConfiguration
WHERE DNSServerSearchOrder!=null

有没有办法过滤掉空条目?

Is there a way to filter out the null entries?

推荐答案

WQL 语言 支持 != 和IS [NOT] NULL 语法，问题是你选择的属性DNSServerSearchOrder 是一个数组，你可以'在 WQL Where 语句中使用数组属性.因此，解决方法是使用 的另一个属性Win32_NetworkAdapterConfiguration where 条件下的 WMI 类.

The WQL language supports != and the IS [NOT] NULL syntax, the problem is the property which you choose DNSServerSearchOrder is an array, and you can't use an array property in a WQL Where sentence. So the workaround is use another property of the Win32_NetworkAdapterConfiguration WMI class in the where condition.

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