32feet.net如何发现附近的蓝牙设备异步在c＃

Question

我想在C＃应用程序中使用32feet.NET蓝牙库来检测附近的设备。我的小应用程序的目的是让PC知道谁在房间里使用人们的手机的蓝牙功能。

做这种事情的最好方法是让我想“跟踪”的设备连接一次，然后不断检查是否可以通过蓝牙检测到。

现在我的问题：

1. 我需要配对或与我申请认证的设备？如何在C＃中使用32feet.NET做到这一点？

2. 如何连续检查范围内的设备并将它们与存储的设备进行比较？

我知道，这一切都是可能的库文件中，但它确实是很难读，我和大多数的例子似乎是在VB，我不知道，并觉得很难翻译成C＃（特别是涉及到AsyncCallbacks等）。

如果有人能给我一个正确的方向，我会很高兴！

Answer 1

这不是一个答案，但我不能够把这么多的代码在评论section.Chagne代码
这些行

//continue listening for other broadcasting devices 
listener.BeginAcceptBluetoothClient(this.BluetoothListenerAcceptClientCallback, listener); 

// create a connection to the device that's just been found 
BluetoothClient client = listener.EndAcceptBluetoothClient(); 

到

// create a connection to the device that's just been found 
BluetoothClient client = listener.EndAcceptBluetoothClient(); 

// continue listening for other broadcasting devices 
listener.BeginAcceptBluetoothClient(this.BluetoothListenerAcceptClientCallback, listener); 

基本上，改变的代码序列..
至于每次调用BeginXXXX方法都必须有下一个EndXXXX。和以上所有代码，你试图BeginAcceptBluetoothClient 已经开始“BeginAcceptBluetoothClient”。

希望你明白。

Answer 2

前面几个警告，我假设你没有在这里处理HID设备，他们通常由操作系统处理。我也刚刚开始使用32feet，我正在使用它创建与蓝牙条形码扫描器上的串行端口服务的连接，因此可能有更好的方法满足您的需求，但这可能会指示您开始正确的方向。

您需要配对设备，是的。如果你在一个WinForms应用程序使用它还有的实际上形成可以显示它处理扫描设备，并允许您选择一个，像这样：

bool PairDevice() 
{ 
    using (var discoverForm = new SelectBluetoothDeviceDialog()) 
    { 
     if (discoverForm.ShowDialog(this) != DialogResult.OK) 
     { 
      // no device selected 
      return false; 
     } 

     BluetoothDeviceInfo deviceInfo = discoverForm.SelectedDevice; 

     if (!deviceInfo.Authenticated) // previously paired? 
     { 
      // TODO: show a dialog with a PIN/discover the device PIN 
      if (!BluetoothSecurity.PairDevice(deviceInfo.DeviceAddress, myPin)) 
      { 
       // not previously paired and attempt to pair failed 
       return false; 
      } 
     } 

     // device should now be paired with the OS so make a connection to it asynchronously 
     var client = new BluetoothClient(); 
     client.BeginConnect(deviceInfo.DeviceAddress, BluetoothService.SerialPort, this.BluetoothClientConnectCallback, client); 

     return true; 
    } 
} 

void BluetoothClientConnectCallback(IAsyncResult result) 
{ 
    var client = (BluetoothClient)result.State; 
    client.EndConnect(); 

    // get the client's stream and do whatever reading/writing you want to do. 
    // if you want to maintain the connection then calls to Read() on the client's stream should block when awaiting data from the device 

    // when you're done reading/writing and want to close the connection or the device servers the connection control flow will resume here and you need to tidy up 
    client.Close(); 
} 

到目前为止，远离最好的办法，如果你的设备是广播他们可用于连接，就是设置一个BluetoothListener，它将持续监听广播设备，当发现一个设备时，您将获得一个BluetoothClient实例，您可以在首次配对时使用相同的实例：

void SetupListener() 
{ 
    var listener = new BluetoothListener(BluetoothService.SerialPort); 
    listener.Start(); 
    listener.BeginAcceptBluetoothClient(this.BluetoothListenerAcceptClientCallback, listener); 
} 


void BluetoothListenerAcceptClientCallback(IAsyncResult result) 
{ 
    var listener = (BluetoothListener)result.State; 

    // continue listening for other broadcasting devices 
    listener.BeginAcceptBluetoothClient(this.BluetoothListenerAcceptClientCallback, listener); 

    // create a connection to the device that's just been found 
    BluetoothClient client = listener.EndAcceptBluetoothClient(); 

    // the method we're in is already asynchronous and it's already connected to the client (via EndAcceptBluetoothClient) so there's no need to call BeginConnect 

    // TODO: perform your reading/writing as you did in the first code sample 

    client.Close(); 
} 

不太吸引人，但如果您的设备没有广播连接，可以使用cre吃了一个新的BluetoothClient，并要求它返回所有的设备，它可以找到：

void ScanForBluetoothClients() 
{ 
    var client = new BluetoothClient(); 
    BluetoothDeviceInfo[] availableDevices = client.DiscoverDevices(); // I've found this to be SLOW! 

    foreach (BluetoothDeviceInfo device in availableDevices) 
    { 
     if (!device.Authenticated) 
     { 
      continue; 
     } 

     var peerClient = new BluetoothClient(); 
     peerClient.BeginConnect(deviceInfo.DeviceAddress, BluetoothService.SerialPort, this.BluetoothClientConnectCallback, peerClient); 
    } 
}