C# 用windows11的API实现 蓝牙键盘的链接、配对、通信

好的，以下是一个简单的 C# 示例代码，可以实现蓝牙键盘的链接、配对、通信：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Windows.Devices.Bluetooth;
using Windows.Devices.Bluetooth.GenericAttributeProfile;
using Windows.Devices.Enumeration;
using Windows.Storage.Streams;

namespace BluetoothKeyboardDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            PairAsync().Wait();
            ConnectAsync().Wait();
            SendDataAsync().Wait();
        }

        static async Task PairAsync()
        {
            Console.WriteLine("Pairing...");
            var selector = BluetoothDevice.GetDeviceSelector();
            var devices = await DeviceInformation.FindAllAsync(selector);
            var keyboard = devices.FirstOrDefault(d => d.Name.Contains("Keyboard"));
            if (keyboard == null)
            {
                Console.WriteLine("Cannot find keyboard device.");
                return;
            }
            var bluetoothDevice = await BluetoothDevice.FromIdAsync(keyboard.Id);
            if (bluetoothDevice == null)
            {
                Console.WriteLine("Cannot create BluetoothDevice object.");
                return;
            }
            if (bluetoothDevice.DeviceInformation.Pairing.IsPaired)
            {
                Console.WriteLine("Keyboard is already paired.");
                return;
            }
            var pairingResult = await bluetoothDevice.DeviceInformation.Pairing.PairAsync();
            if (pairingResult.Status == DevicePairingResultStatus.Paired)
            {
                Console.WriteLine("Keyboard is paired successfully.");
            }
            else
            {
                Console.WriteLine("Failed to pair with keyboard.");
            }
        }

        static async Task ConnectAsync()
        {
            Console.WriteLine("Connecting...");
            var selector = GattDeviceService.GetDeviceSelectorFromUuid(GattServiceUuids.HumanInterfaceDevice);
            var devices = await DeviceInformation.FindAllAsync(selector);
            var keyboard = devices.FirstOrDefault(d => d.Name.Contains("Keyboard"));
            if (keyboard == null)
            {
                Console.WriteLine("Cannot find keyboard device.");
                return;
            }
            var service = await GattDeviceService.FromIdAsync(keyboard.Id);
            if (service == null)
            {
                Console.WriteLine("Cannot create GattDeviceService object.");
                return;
            }
            Console.WriteLine("Connected.");
        }

        static async Task SendDataAsync()
        {
            Console.WriteLine("Sending data...");
            var selector = GattDeviceService.GetDeviceSelectorFromUuid(GattServiceUuids.HumanInterfaceDevice);
            var devices = await DeviceInformation.FindAllAsync(selector);
            var keyboard = devices.FirstOrDefault(d => d.Name.Contains("Keyboard"));
            if (keyboard == null)
            {
                Console.WriteLine("Cannot find keyboard device.");
                return;
            }
            var service = await GattDeviceService.FromIdAsync(keyboard.Id);
            if (service == null)
            {
                Console.WriteLine("Cannot create GattDeviceService object.");
                return;
            }
            var characteristic = service.GetCharacteristics(GattCharacteristicUuids.KeyboardInputReport)[0];
            var writer = new DataWriter();
            writer.WriteByte(0x02);
            writer.WriteByte(0x00);
            writer.WriteByte(0x00);
            writer.WriteByte(0x00);
            writer.WriteByte(0x00);
            writer.WriteByte(0x00);
            writer.WriteByte(0x00);
            writer.WriteByte(0x00);
            var result = await characteristic.WriteValueAsync(writer.DetachBuffer());
            if (result == GattCommunicationStatus.Success)
            {
                Console.WriteLine("Data sent successfully.");
            }
            else
            {
                Console.WriteLine("Failed to send data.");
            }
        }
    }
}

这段代码使用了 UWP 中的 Bluetooth API，可以实现蓝牙键盘的链接、配对、通信。具体的实现过程如下：

1. `PairAsync` 方法使用 `BluetoothDevice` 类查找蓝牙键盘设备，并进行配对操作；
2. `ConnectAsync` 方法使用 `GattDeviceService` 类连接到蓝牙键盘的 GATT 服务；
3. `SendDataAsync` 方法使用 `GattCharacteristic` 类向蓝牙键盘发送数据。

需要注意的是，由于 Windows 11 的 API 可能与不同的蓝牙键盘设备有所差异，所以您可能需要根据具体的设备型号和要求进行调整和修改。