c# 如何使用wlanapi连接电脑到wifi

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

Introduction

This article will demonstrate the ability to establish and operate a WiFi 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 was to create a function that returns the WiFi networks available for connection. Using the WLANOpenHandle, you create the client to use for 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:

Wlan.WlanEnumInterfaces(

clientHandle, <--- (clientHandle precedentemente istanziato)

IntPtr.Zero,

ref pInterfaceList)

Step 3

Using the pointer to the list of available interfaces, we will populate the structure that will contain all Wlan.WLAN_INTERFACE_INFO_LIST NIC interface information:

Wlan.WLAN_INTERFACE_INFO_LIST interfaceList =

		new Wlan.WLAN_INTERFACE_INFO_LIST(pInterfaceList);

Step 4

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

Guid InterfaceGuid =

	((Wlan.WLAN_INTERFACE_INFO)interfaceList.InterfaceInfo[0]).InterfaceGuid;

Step 5

Now we have all the elements to call the API Wlan.WlanGetAvailableNetworkList; declare that we will 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 = wlanAvailableNetworkList.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</keyType><protected>false</protected>

          <keyMaterial>{1}</keyMaterial></sharedKey><keyIndex>0</keyIndex>

          </security></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/networking/WLAN/profile/v1\">

         <name>{0}</name><SSIDConfig><SSID><name>{0}</name></SSID></SSIDConfig>

         <connectionType>ESS</connectionType><connectionMode>auto</connectionMode>

         <autoSwitch>false</autoSwitch><MSM><security><authEncryption>

         <authentication>WPAPSK</authentication><encryption>TKIP</encryption>

         <useOneX>false</useOneX></authEncryption><sharedKey>

         <keyType>passPhrase</keyType><protected>false</protected>

         <keyMaterial>{1}</keyMaterial></sharedKey></security></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;

}

补充参考：

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

http://msdn.microsoft.com/en-us/library/windows/desktop/aa370032(v=vs.85).aspx

http://msdn.microsoft.com/en-us/library/windows/desktop/aa369853(v=vs.85).aspx

巴特西