C# 用windows11的API实现 蓝牙键盘的链接、配对、数据接收

首先，您需要在C#中使用Windows 11的API来检测蓝牙设备。您可以使用Windows.Devices.Bluetooth命名空间中的BluetoothLEAdvertisementWatcher类来检测设备。以下是示例代码：

using Windows.Devices.Bluetooth;
using Windows.Devices.Bluetooth.Advertisement;

BluetoothLEAdvertisementWatcher watcher = new BluetoothLEAdvertisementWatcher();
watcher.Received += OnAdvertisementReceived;
watcher.Start();

private void OnAdvertisementReceived(BluetoothLEAdvertisementWatcher watcher, BluetoothLEAdvertisementReceivedEventArgs eventArgs)
{
    if (eventArgs.Advertisement.LocalName == "Your Keyboard Name")
    {
        // 设备已找到
        // 停止扫描
        watcher.Stop();
        // 连接设备
        BluetoothLEDevice device = await BluetoothLEDevice.FromBluetoothAddressAsync(eventArgs.BluetoothAddress);
        // 配对设备
        DevicePairingResult result = await device.DeviceInformation.Pairing.PairAsync();
        // 检查配对是否成功
        if (result.Status == DevicePairingResultStatus.Paired || result.Status == DevicePairingResultStatus.AlreadyPaired)
        {
            // 配对成功，开始数据接收
            GattDeviceService service = await GattDeviceService.FromIdAsync(device.DeviceId);
            GattCharacteristic characteristic = service.GetCharacteristics(new Guid("Characteristic UUID"))[0];
            // 注册数据接收事件
            characteristic.ValueChanged += OnCharacteristicValueChanged;
            await characteristic.WriteClientCharacteristicConfigurationDescriptorAsync(GattClientCharacteristicConfigurationDescriptorValue.Notify);
        }
    }
}

private void OnCharacteristicValueChanged(GattCharacteristic sender, GattValueChangedEventArgs args)
{
    // 接收到新数据
    byte[] data = args.CharacteristicValue.ToArray();
    // 处理数据
}

在此示例中，我们使用BluetoothLEAdvertisementWatcher类来查找设备。当找到设备时，我们停止扫描并尝试连接设备。如果设备未配对，则配对设备。接下来，我们获取设备服务和特征并注册数据接收事件。当接收到新数据时，我们使用OnCharacteristicValueChanged方法进行处理。

请注意，您需要替换示例代码中的“Your Keyboard Name”和“Characteristic UUID”以适应您的蓝牙键盘。