Hi anybody...

does anybody know about BeginDiscoverDevices() method? 

 tanx all.

 i didn´t get that function either ..

It's explained here :

 Summary:
   An asynchronous version of InTheHand.Net.Sockets.BluetoothClient.DiscoverDevices(System.Int32,System.Boolean,System.Boolean,System.Boolean,System.Boolean)

Parameters:
  maxDevices:
   See InTheHand.Net.Sockets.BluetoothClient.DiscoverDevices(System.Int32,System.Boolean,System.Boolean,System.Boolean,System.Boolean).

  authenticated:
    See InTheHand.Net.Sockets.BluetoothClient.DiscoverDevices(System.Int32,System.Boolean,System.Boolean,System.Boolean,System.Boolean).

 remembered:
   See InTheHand.Net.Sockets.BluetoothClient.DiscoverDevices(System.Int32,System.Boolean,System.Boolean,System.Boolean,System.Boolean).

 unknown:
     See InTheHand.Net.Sockets.BluetoothClient.DiscoverDevices(System.Int32,System.Boolean,System.Boolean,System.Boolean,System.Boolean).

discoverableOnly:
    See InTheHand.Net.Sockets.BluetoothClient.DiscoverDevices(System.Int32,System.Boolean,System.Boolean,System.Boolean,System.Boolean).
 
   callback:
    An optional asynchronous callback, to be called when the discovery is complete.

 state:
    A user-provided object that distinguishes this particular asynchronous discovery
    request from other requests.

 Returns:
    An System.IAsyncResult that represents the asynchronous discovery, which
     could still be pending.
        public IAsyncResult BeginDiscoverDevices(int maxDevices, bool authenticated, bool remembered, bool unknown, bool discoverableOnly, AsyncCallback callback, object state);

Did you see this ?

There are two patterns for asynchronous operations in .NET.  I used the Begin/EndXXX+IAsyncResult one called APM (Async Programming Model) there.  It's quite flexible but a bit complex.  The other asynchronous pattern uses an event (XxxxCompleted) along with a XxxxStart() method.  I've checked into CodePlex a version of that pattern in class BluetoothComponent.  One can use it like the following.  Hopefully its a bit easier to understand.  (It's non-NETCF at the moment.  Some more work is needed for that platform, let me know if its needed).

Public Sub DiscoDevicesAsync()
    Dim m_btco As New BluetoothComponent()
    AddHandler m_btco.DiscoverDevicesComplete, AddressOf HandleDiscoDevicesAsync
    m_btco.StartDiscoverDevices(255, True, True, True, False, Nothing)
End Sub

Private Sub HandleDiscoDevicesAsync(ByVal sender As Object, ByVal e As DiscoverDevicesEventArgs)
    If e.Cancelled Then
        Console.WriteLine("DiscoDevicesAsync cancelled.")
    ElseIf e.Error IsNot Nothing Then
        Console.WriteLine("DiscoDevicesAsync error: {0}.", e.Error.Message)
    Else
        Console.WriteLine("DiscoDevicesAsync found {0} devices.", e.Devices.Length)
    End If
End Sub

(One can even compile the BluetoothComponent class outside library assembly (e.g. in your application if it's C#) if recompiling the library it not suitable).

Hi,

I have looking into the forum for solution on methods available for the BluetoothClient to search for all bluetooth devices in the range with or without paired. I have tried DiscoverDevices(maxDevices, authenticated, remembered, unknown).

I have tried all combination from all true to all false but still couldn't find one combination that can achieve what i want. Any other way i can search all bluetooth devices included paired and connected devices.

Please advise. Really appreciated. Thanks.

 Hello alanjmcf...

 I don't understand your code... 

I have problems with DiscoverDevices() method. When I callt to this method on a new Thread, this always return 0 devices. How can I use this method on a new Thread?? 

I think that the code that you are posting will help me... But I can understand this code. Please do you can help me?... Do you have an sample?... Thank you very much!!!