Windows.Devices.Bluetooth无法断开已连接的蓝牙

Question

winfrom 中采用Windows.Devices.Bluetooth来实现连接nordic蓝牙设备（52840），连接成功后，我无法断开已经连接的设备？很奇怪官方文档没有断开的说明，找不到任何相关断开低功率设备的文档代码，能找到的只有device.Dispose();但是毫无作用？为什么是因为win api底层问题吗？

Answer 1

你好

欢迎来到微软问答！

推荐你使用 win32 API DeviceIoControl 中的 IOCTL_BTH_DISCONNECT_DEVICE IOCTL 来断开蓝牙连接。

你可以参考一下以下代码。我没有设备测试，你可以尝试一下。

// Define the IOCTL code for disconnecting a Bluetooth device
    const int IOCTL_BTH_DISCONNECT_DEVICE = 0x41000c;

    [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
    static extern bool DeviceIoControl(IntPtr hDevice, uint dwIoControlCode,
        IntPtr lpInBuffer, uint nInBufferSize,
        IntPtr lpOutBuffer, uint nOutBufferSize,
        ref uint lpBytesReturned, IntPtr lpOverlapped);

    static void Main()
    {
        // Replace this with the actual Bluetooth address of your target device
        ulong remoteDeviceAddress = /* Your target device's address */;

        IntPtr hDevice = IntPtr.Zero;
        try
        {
            hDevice = CreateFile("\\\\.\\BthModem", FileAccess.ReadWrite, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, 0, IntPtr.Zero);
            if (hDevice != IntPtr.Zero)
            {
                uint bytesReturned = 0;
                bool success = DeviceIoControl(hDevice, IOCTL_BTH_DISCONNECT_DEVICE,
                    Marshal.AllocHGlobal(sizeof(ulong)), sizeof(ulong),
                    IntPtr.Zero, 0, ref bytesReturned, IntPtr.Zero);

                if (success)
                {
                    Console.WriteLine("Bluetooth device disconnected successfully.");
                }
                else
                {
                    Console.WriteLine("Failed to disconnect the Bluetooth device.");
                }
            }
            else
            {
                Console.WriteLine("Error opening the Bluetooth device.");
            }
        }
        finally
        {
            if (hDevice != IntPtr.Zero)
            {
                CloseHandle(hDevice);
            }
        }
    }

    [DllImport("kernel32.dll", SetLastError = true)]
    static extern IntPtr CreateFile(string lpFileName, FileAccess dwDesiredAccess,
        FileShare dwShareMode, IntPtr lpSecurityAttributes, FileMode dwCreationDisposition,
        uint dwFlagsAndAttributes, IntPtr hTemplateFile);

    [DllImport("kernel32.dll", SetLastError = true)]
    static extern bool CloseHandle(IntPtr hObject);

谢谢。

---

如果答案是正确的解决方案，请点击“接受答案”并点赞。如果您对此答案还有其他问题，请点击“评论”。 注意：如果您想收到此主题的相关电子邮件通知，请按照我们文档中的步骤启用电子邮件通知。