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using InTheHand.Net;using InTheHand.Net.Sockets;using InTheHand.Net.Bluetooth;

private BluetoothClient btClient;private NetworkStream btStream;private BluetoothDeviceInfo selectedDevice;private readonly Guid serviceUUID = new Guid("00001132-0000-1000-8000-00805f9b34fb"); // 標準SPP服務
// 掃描藍牙設備private void btnScan_Click(object sender, EventArgs e){	lstDevices.Items.Clear();	btClient = new BluetoothClient();	var devices = btClient.DiscoverDevices();
	foreach (var device in devices)	{		lstDevices.Items.Add($"{device.DeviceName} [{device.DeviceAddress}]");	}}
// 設備選擇private void lstDevices_SelectedIndexChanged(object sender, EventArgs e){	var selected = btClient.DiscoverDevices()[lstDevices.SelectedIndex];	selectedDevice = selected;	richTextBox1.AppendText($"已選擇：{selected.DeviceName}\n");}
// 建立連接private void btnConnect_Click(object sender, EventArgs e){	try	{		btClient.Connect(selectedDevice.DeviceAddress, serviceUUID);		btStream = btClient.GetStream();		StartListening();		richTextBox1.AppendText("連接成功\n");	}	catch (Exception ex)	{		MessageBox.Show($"連接失敗：{ex.Message}");	}}

// 異步數據接收private void StartListening(){	new Thread(() =>	{		byte[] buffer = new byte[1024];		while (btClient?.Connected == true)		{			try			{				int bytesRead = btStream.Read(buffer, 0, buffer.Length);				if (bytesRead > 0)				{					string received = Encoding.UTF8.GetString(buffer, 0, bytesRead);					Invoke((MethodInvoker)delegate { richTextBox1.AppendText($"[接收] {received}\n"); });				}			}			catch { break; }		}	}).Start();}

// 發送數據private void btnSend_Click(object sender, EventArgs e){	if (btClient?.Connected != true) return;	// 讀取文件并發送	byte[] buffer = new byte[1024]; // 緩沖區大小可以根據需要調整	using (FileStream fs = new FileStream(txtSend.Text, FileMode.Open, FileAccess.Read))	{		int bytesRead;		while ((bytesRead = fs.Read(buffer, 0, buffer.Length)) > 0)		{			btClient.GetStream().Write(buffer, 0, bytesRead);		}	}	richTextBox1.AppendText($"[發送] {txtSend.Text}\n");	txtSend.Clear();}