拚忘的博客园要开始写随笔了，第一期就先讲讲wifi热点吧.....

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C#打开WiFi热点，WiFi共享的四种方式总结（一）

C#打开WiFi热点，WiFi共享的四种方式总结（二）

C#打开WiFi热点，WiFi共享的四种方式总结（三）

C#打开WiFi热点，WiFi共享的四种方式总结（四）

C# Windows系统 ，WiFi共享的方式，打开WiFi热点我最近研究总结了又四种方式开启。

1.通过netsh wlan命令行开启

2.通过wlanapi接口共享

3.通过Win10 Api开启，Windows.Devices.WiFiDirect

4.通过Win10 api，Windows.Networking.NetworkOperators.NetworkOperatorTetheringManager 开启电脑自带的热点。

二、通过windows提供的wlanapi.dll来开启热点共享。

微软也是提供了操作netsh的相关接口，其实原理和通过Cmd操作netsh wlan是一样的同样也需要网卡支持承载，一般Win10现在很多网卡不支持。

通过CMD的方式参考上文：https://www.cnblogs.com/panwangvie/p/14878148.html

具体API参考文档：http://www.pinvoke.net/default.aspx/wlanapi.wlanconnect

需要用到的api如下：

public static class WlanNativeMethods
    {
        public delegate void WlanNotificationCallback(ref WlanNotificationData notificationData, IntPtr context);

        /// <summary>
        /// </summary>
        /// <param name="hClientHandle"></param>
        /// <param name="pReserved">Must pass in IntPtr.Zero</param>
        /// <returns></returns>
        [DllImport("Wlanapi.dll", EntryPoint = "WlanCloseHandle")]
        public static extern int WlanCloseHandle([In] IntPtr hClientHandle, IntPtr pReserved);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanHostedNetworkForceStart")]
        public static extern int WlanHostedNetworkForceStart(IntPtr hClientHandle,
            [Out] out WlanHostedNetworkReason pFailReason, IntPtr pReserved);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanHostedNetworkForceStop")]
        public static extern int WlanHostedNetworkForceStop(IntPtr hClientHandle,
            [Out] out WlanHostedNetworkReason pFailReason, IntPtr pReserved);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanHostedNetworkInitSettings")]
        public static extern int WlanHostedNetworkInitSettings(IntPtr hClientHandle,
            [Out] out WlanHostedNetworkReason pFailReason, IntPtr pReserved);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanHostedNetworkQueryProperty")]
        public static extern int WlanHostedNetworkQueryProperty(IntPtr hClientHandle, WlanHostedNetworkOpcode opCode,
            [Out] out uint pDataSize, [Out] out IntPtr ppvData, [Out] out WlanOpcodeValueType pWlanOpcodeValueType,
            IntPtr pReserved);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanHostedNetworkQuerySecondaryKey")]
        public static extern int WlanHostedNetworkQuerySecondaryKey(IntPtr hClientHandle, [Out] out uint pKeyLength,
            [Out, MarshalAs(UnmanagedType.LPStr)] out string ppucKeyData, [Out] out bool pbIsPassPhrase,
            [Out] out bool pbPersistent, [Out] out WlanHostedNetworkReason pFailReason, IntPtr pReserved);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanHostedNetworkQueryStatus")]
        public static extern int WlanHostedNetworkQueryStatus(IntPtr hClientHandle,
            [Out] out IntPtr ppWlanHostedNetworkStatus, IntPtr pReserved);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanHostedNetworkRefreshSecuritySettings")]
        public static extern int WlanHostedNetworkRefreshSecuritySettings(IntPtr hClientHandle,
            [Out] out WlanHostedNetworkReason pFailReason, IntPtr pReserved);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanHostedNetworkSetProperty")]
        public static extern int WlanHostedNetworkSetProperty(IntPtr hClientHandle, WlanHostedNetworkOpcode opCode,
            uint dwDataSize, IntPtr pvData, [Out] out WlanHostedNetworkReason pFailReason, IntPtr pReserved);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanHostedNetworkSetSecondaryKey")]
        public static extern int WlanHostedNetworkSetSecondaryKey(IntPtr hClientHandle, uint dwKeyLength,
            byte[] pucKeyData, bool bIsPassPhrase, bool bPersistent, [Out] out WlanHostedNetworkReason pFailReason,
            IntPtr pReserved);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanOpenHandle")]
        public static extern int WlanOpenHandle(uint dwClientVersion, IntPtr pReserved,
            [Out] out uint pdwNegotiatedVersion, [Out] out IntPtr clientHandle);

        [DllImport("Wlanapi.dll", EntryPoint = "WlanRegisterNotification")]
        public static extern int WlanRegisterNotification(IntPtr hClientHandle, WlanNotificationSource dwNotifSource,
            bool bIgnoreDuplicate,
            WlanNotificationCallback funcCallback, IntPtr pCallbackContext, IntPtr pReserved,
            [Out] out WlanNotificationSource pdwPrevNotifSource);
    }

启动流程：

private static void Start()
        {
            Close();
            Try(() =>
            {
                WlanHostedNetworkReason reason;
                Console.Write("启用托管网络中……");
                reason = WlanManager.SetEnabled(true);
                if (reason != WlanHostedNetworkReason.Success)
                {
                    Close();
                    return;
                }
                Console.Write("正在应用设置……");
                reason = WlanManager.SetConnectionSettings(ssid, peersCount);
                if (reason != WlanHostedNetworkReason.Success)
                {
                    WriteReason(reason);
                    Close();
                    return;
                }
                var keyString = key as string;
                reason = keyString != null ? WlanManager.SetSecondaryKey(keyString)
                                                       : WlanManager.SetSecondaryKey((byte[]) key);
                if (reason != WlanHostedNetworkReason.Success)
                {
                    Close();
                    return;
                }
                Console.Write("启动共享中……");
                 WlanManager.ForceStart() ;
            }, Close);
        }

  public static WlanHostedNetworkReason SetConnectionSettings(string hostedNetworkSsid, int maxNumberOfPeers)
        {
            WlanHostedNetworkReason failReason;
            var settings = new WlanHostedNetworkConnectionSettings
                { HostedNetworkSSID = ToDOT11_SSID(hostedNetworkSsid), MaxNumberOfPeers = (uint)maxNumberOfPeers };
            var settingsPtr = Marshal.AllocHGlobal(Marshal.SizeOf(settings));
            Marshal.StructureToPtr(settings, settingsPtr, false);
             WlanNativeMethods.WlanHostedNetworkSetProperty(wlanHandle,
                                        WlanHostedNetworkOpcode.ConnectionSettings,
                                        (uint)Marshal.SizeOf(settings), settingsPtr, out failReason, IntPtr.Zero);
            return failReason;
        }

        public static WlanHostedNetworkReason SetEnabled(bool enabled)
        {
            WlanHostedNetworkReason failReason;
            var settingsPtr = Marshal.AllocHGlobal(Marshal.SizeOf(enabled));
            Marshal.StructureToPtr(enabled, settingsPtr, false);
           WlanNativeMethods.WlanHostedNetworkSetProperty(wlanHandle,
                                        WlanHostedNetworkOpcode.Enable,
                                        (uint)Marshal.SizeOf(enabled), settingsPtr, out failReason, IntPtr.Zero);
            return failReason;
        }

      public static WlanHostedNetworkReason SetSecondaryKey(string passKey, bool isPersistent = true)
        {
            WlanHostedNetworkReason failReason;
             WlanNativeMethods.WlanHostedNetworkSetSecondaryKey(wlanHandle,
                (uint)(passKey.Length + 1), Encoding.Default.GetBytes(passKey), true, isPersistent, out failReason,
                IntPtr.Zero);
            return failReason;
        }
    public static WlanHostedNetworkReason SetSecondaryKey(byte[] passKey, bool isPersistent = true)
        {
            WlanHostedNetworkReason failReason;
             WlanNativeMethods.WlanHostedNetworkSetSecondaryKey(wlanHandle,
                                       32, passKey, false, isPersistent, out failReason, IntPtr.Zero);
            return failReason;
        }
 public static WlanHostedNetworkReason ForceStart()
        {
            WlanHostedNetworkReason failReason;
           WlanNativeMethods.WlanHostedNetworkForceStart(wlanHandle, out failReason, IntPtr.Zero);
            return failReason;
        }

        public static WlanHostedNetworkReason ForceStop()
        {
            WlanHostedNetworkReason failReason;
            WlanNativeMethods.WlanHostedNetworkForceStop(wlanHandle, out failReason, IntPtr.Zero);
            return failReason;
        }

代码下载：https://gitee.com/panwangvie