Querying WiFi/WLAN network frequency via Native Wifi

Question

The system control panel shows this info.

How can I query it (using C#)?

But they only seem to contain DOT11_PHY_TYPE dot11PhyType;.

This gives me some information, but not all.

Example:

Apparently most protocols can use multiple frequencies. So how can I get the currently used one? Should I just show the highest value in the list?

I think I'm misunderstanding something here.

WlanGetNetworkBssList. It returns WLAN_BSS_LIST each item of that (WLAN_BSS_ENTRY) contains ulChCentrFrequency field. That is what you are looking for. or you can use third party lib that does all for you. For example: WiFi Framework. — Mike Petrichenko
– Mike Petrichenko, Commented Aug 21, 2024 at 17:05
@MikePetrichenko Thank you very much, that works. If you post that as an answer I can accept it. Out of curiosity, if you know, why would this info not be available in WlanQueryInterface? — AyCe
– AyCe, Commented Aug 21, 2024 at 18:45
It actually is but from other point of view. You can query channel number (wlan_intf_opcode_channel_number) which is unique identifies a current frequency. Just simple map channel to frequency (you also need to know PHY, but you already can do it). — Mike Petrichenko
– Mike Petrichenko, Commented Aug 21, 2024 at 19:00

Jeaninez - MSFT · Accepted Answer · 2024-08-28 07:41:12Z

1

According to the suggestion of Mike Petrichenko:

You could try to use WlanGetNetworkBssList.

It returns WLAN_BSS_LIST each item of that (WLAN_BSS_ENTRY) contains ulChCentrFrequency field. That is what you are looking for.

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