C # How to use Wlanapi to connect your PC to WiFi

Http://www.codeproject.com/Articles/72105/Manage-WiFi-with-Native-API-WIFI-on-Windows-XP-SP

Introduction

This article would demonstrate the ability to establish and operate a Wi-Fi connection from a C # program using the Wireless LAN API on a Windows XP Embedded SP2 \ Windows XP Pro SP2.

Step 1

The first step is to create a function of returns the WiFi networks available for connection. Using WLANOpenHandle The, you create the client to the session:

Wlan.wlanopenhandle (WLAN.WLAN_CLIENT_VERSION_XP_SP2, <---(Wireless LAN API for Windows XP with SP2) IntPtr.Zero, ref Negotiatedversion, ref Clienthandle)

　　

Step 2

Then list all the wireless LAN interfaces visible from our PC:

　　

Step 3

Using the pointer to the list of available interfaces, we'll populate the structure that'll contain all Wlan.WLAN_INTERFACE_INFO_LIST  NIC inter Face information:

　　

Step 4

What we is still missing at this point and guidance of our interface to being passed Wlan.WlanGetAvailableNetworkList to the function, we get through T His passage:

Step 5

Now we have the elements to call the API Wlan.WlanGetAvailableNetworkList , declare that we'll return the pointer function and proceed:

IntPtr pavailablenetworklist = IntPtr.Zero; Wlan.wlangetavailablenetworklist (Clienthandle,                                   Interfaceguid,                                   Wlan.WlanGetAvailableNetworkFlags.IncludeAllManualHiddenProfiles,                                  IntPtr.Zero,                                   out Ppavailablenetworklist)

Scroll through the list of connections:

Wlan.wlan_available_network_list wlanavailablenetworklist =     new Wlan.wlan_available_network_list ( Pavailablenetworklist); Wlan.wlanfreememory (pavailablenetworklist); for (int j = 0; J < Wlanavailablenetworklist.dwnumberofitems; J + +) {    Wlan.wlan_available_network NETWORK = Wlanavai LABLENETWORKLIST.NETWORKS[J];    String SSId = Getstringforssid (NETWORK.DOT11SSID);    if (SSID! = "")    {       //connessione       wifi_setprofile (Network.dot11defaultauthalgorithm, SSID);}  }

Depending on the type of connection configured for my Access point imposed the correct profile and I connect:

static void Wifi_setprofile (Wlan.dot11_auth_algorithm conntype, string snetssid) {switch (conntype) {//WEP- OPen case Wlan.dot11_auth_algorithm. Dot11_auth_algo_80211_open:profilexml = string. Format ("<?xml version=\" 1.0\ "?> <wlanprofile xmlns=\" http://www.microsoft.com/networking/WLAN/ Profile/v1\ "> <name>{0}</name><ssidconfig><ssid><name>{0}</name></ Ssid></ssidconfig> <connectionType>ESS</connectionType><MSM><security><          Authencryption> <authentication>open</authentication><encryption>WEP</encryption> <useOneX>false</useOneX></authEncryption><sharedKey> <keytype>networkkey</k Eytype><protected>false</protected> <keyMaterial>{1}</keyMaterial></sharedKey> <keyIndex>0</keyIndex> </security>&Lt;/msm></wlanprofile> ", profilename, key); Wlan.wlansetprofile (Clienthandle, Interfaceguid, Wlan.WlanProfileFlags.AllUser, Profilexml, NULL, true, IntPtr.Zero,       Out Reasoncode);         if (reasoncode==wlan.wlanreasoncode.success) {//connect!!!      ...      }      else {//return usually 1168–error is on profile Xml or ' on key} ' break; WPA_PSK case Wlan.dot11_auth_algorithm. Dot11_auth_algo_wpa_psk:profilexml = string. Format ("<?xml version=\" 1.0\ "encoding=\" us-ascii\ "?> <wlanprofile xmlns=\" Http://www.microsoft.com/netwo Rking/wlan/profile/v1\ "> <name>{0}</name><ssidconfig><ssid><name>{0}</name& Gt;</ssid></ssidconfig> <connectiontype>ess</connectiontype><connectionmode>auto& Lt;/connectionmode> <autoswitch>false</autoswitch><msm><security><authencryption&         Gt <authEntication>wpapsk</authentication><encryption>tkip</encryption> <useOneX>false</ Useonex></authencryption><sharedkey> <keyType>passPhrase</keyType><protected> False</protected> &LT;KEYMATERIAL&GT;{1}&LT;/KEYMATERIAL&GT;&LT;/SHAREDKEY&GT;&LT;/SECURITY&GT;&LT;/MSM   ></WLANProfile> ", profilename, key); Wlan.wlansetprofile (Clienthandle, Interfaceguid, Wlan.wlanprofileflag                           S.alluser, Profilexml, NULL, True,   IntPtr.Zero, out Reasoncode);          if (Reasoncode = = Wlan.WlanReasonCode.Success) {//connect!!!      ...      } else {//return usually 1168–error is on profile Xml or ' on key} ' break;  }

　　

Supplementary reference: Http://stackoverflow.com/questions/6318575/connect-to-a-wireless-network-in-c-sharp

C # How to use Wlanapi to connect your PC to WiFi