How do I get the available wifi APs and their signal strength in .net?

Question

Is there any way to access all WiFi access points and their respective RSSI values using .NET? It would be really nice if I could do it without using unmanaged code or even better if it worked in mono as well as .NET.

If it is possible i would appriciate a code sample. Thanks

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Here are a few similiar stackoverflow questions i found:

-Get SSID of the wireless network I am connected to with C# .Net on Windows Vista

-Managing wireless network connection in C#

-Get BSSID (MAC address) of wireless access point from C#

Answer 1

It is a wrapper project with managed code in c# at http://www.codeplex.com/managedwifi

It supports Windows Vista and XP SP2 (or later version).

sample code:

using NativeWifi; using System; using System.Text;  namespace WifiExample {     class Program     {         /// <summary>         /// Converts a 802.11 SSID to a string.         /// </summary>         static string GetStringForSSID(Wlan.Dot11Ssid ssid)         {             return Encoding.ASCII.GetString( ssid.SSID, 0, (int) ssid.SSIDLength );         }          static void Main( string[] args )         {             WlanClient client = new WlanClient();             foreach ( WlanClient.WlanInterface wlanIface in client.Interfaces )             {                 // Lists all networks with WEP security                 Wlan.WlanAvailableNetwork[] networks = wlanIface.GetAvailableNetworkList( 0 );                 foreach ( Wlan.WlanAvailableNetwork network in networks )                 {                     if ( network.dot11DefaultCipherAlgorithm == Wlan.Dot11CipherAlgorithm.WEP )                     {                         Console.WriteLine( "Found WEP network with SSID {0}.", GetStringForSSID(network.dot11Ssid));                     }                 }                  // Retrieves XML configurations of existing profiles.                 // This can assist you in constructing your own XML configuration                 // (that is, it will give you an example to follow).                 foreach ( Wlan.WlanProfileInfo profileInfo in wlanIface.GetProfiles() )                 {                     string name = profileInfo.profileName; // this is typically the network's SSID                      string xml = wlanIface.GetProfileXml( profileInfo.profileName );                 }                  // Connects to a known network with WEP security                 string profileName = "Cheesecake"; // this is also the SSID                 string mac = "52544131303235572D454137443638";                 string key = "hello";                 string profileXml = string.Format("<?xml version=\"1.0\"?><WLANProfile xmlns=\"http://www.microsoft.com/networking/WLAN/profile/v1\"><name>{0}</name><SSIDConfig><SSID><hex>{1}</hex><name>{0}</name></SSID></SSIDConfig><connectionType>ESS</connectionType><MSM><security><authEncryption><authentication>open</authentication><encryption>WEP</encryption><useOneX>false</useOneX></authEncryption><sharedKey><keyType>networkKey</keyType><protected>false</protected><keyMaterial>{2}</keyMaterial></sharedKey><keyIndex>0</keyIndex></security></MSM></WLANProfile>", profileName, mac, key);                  wlanIface.SetProfile( Wlan.WlanProfileFlags.AllUser, profileXml, true );                 wlanIface.Connect( Wlan.WlanConnectionMode.Profile, Wlan.Dot11BssType.Any, profileName );             }         }     } } 

Answer 2

If the platform is Windows10, you can use Microsoft.Windows.SDK.Contracts package to access all available wifis.

First, install Microsoft.Windows.SDK.Contracts package from nuget.

Then, you can use next code to get ssid and signal strength.

var adapters = await WiFiAdapter.FindAllAdaptersAsync(); foreach (var adapter in adapters) {     foreach (var network in adapter.NetworkReport.AvailableNetworks)     {         Console.WriteLine($"ssid: {network.Ssid}");         Console.WriteLine($"signal strength: {network.SignalBars}");     } }