如何在 Win7 中从 C# .Net 断开蓝牙设备

Question

我想从在 Win 7 x64 上运行的 c# .Net 应用程序断开蓝牙设备。

我知道 MS 在 .Net 上提供的有关 BT 的功能非常少。

我搜索了 32feet.Net，并找到了如何连接、发现、获取信息……但没有找到有关断开连接的信息（我是否错过了什么？）。

然后，我在 Msdn IOCTL_BTH_DISCONNECT_DEVICE上找到了。问题是我不明白如何调用它。看来我应该将DeviceIOControl与 Platform Invoke 一起使用，但恐怕我没有足够的 .Net 技能来自己构建这个。

这是我现在所处的位置：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;
using System.IO;

namespace BtDisco
{
    class Program
    {
        const int IOCTL_BTH_DISCONNECT_DEVICE = 0x41000c;

        [DllImport("Kernel32.dll", SetLastError = false, CharSet = CharSet.Auto)]
        public static extern bool DeviceIoControl(
            Microsoft.Win32.SafeHandles.SafeFileHandle hDevice,
            uint dwIoControlCode,
            [MarshalAs(UnmanagedType.AsAny)] [In] object InBuffer,
            uint nInBufferSize,
            [MarshalAs(UnmanagedType.AsAny)] [Out] object OutBuffer,
            uint nOutBufferSize,
            ref uint pBytesReturned,
            [In] ref System.Threading.NativeOverlapped Overlapped
            );

        [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern SafeFileHandle CreateFile(
            string lpFileName,
            [MarshalAs(UnmanagedType.U4)] FileAccess dwDesiredAccess,
            [MarshalAs(UnmanagedType.U4)] FileShare dwShareMode,
            IntPtr lpSecurityAttributes,
            [MarshalAs(UnmanagedType.U4)] FileMode dwCreationDisposition,
            [MarshalAs(UnmanagedType.U4)] FileAttributes dwFlagsAndAttributes,
            IntPtr hTemplateFile);


        static void Main(string[] args)
        {
            //http://msdn.microsoft.com/en-us/library/windows/desktop/aa363216(v=vs.85).aspx
            //hDev = Use CreateFile
            SafeFileHandle _hdev = CreateFileR(...);

            DeviceIoControl(hDev, IOCTL_BTH_DISCONNECT_DEVICE, char[] btAddr, btAddr.Length(), result, result.Length(), ref getCnt, IntPtr.Zero);
        }
    }
}

有人可以帮助我完成这个吗？

Answer 1

终于，我自己成功了！

我在 InTheHand.Net 代码中进行了更多搜索，终于明白了如何制作它！

这是一些工作代码（如果你想使用它，你将需要 InTheHand.Net）：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Globalization;
using System.Text;
using InTheHand.Net;
using InTheHand.Net.Bluetooth;
using System.Runtime.InteropServices;

namespace BTDisco2
{
    class Program
    {
        const int IOCTL_BTH_DISCONNECT_DEVICE = 0x41000c;
        [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        internal static extern bool DeviceIoControl(
        IntPtr hDevice,
        uint dwIoControlCode,
        ref long InBuffer,
        int nInBufferSize,
        IntPtr OutBuffer,
        int nOutBufferSize,
        out int pBytesReturned,
        IntPtr lpOverlapped);

        static void Main(string[] args)
        {
            var r = BluetoothRadio.PrimaryRadio;
            var h = r.Handle;
            long btAddr = BluetoothAddress.Parse("00:1b:3d:0d:ac:31").ToInt64();
            int bytesReturned = 0;
            var success = DeviceIoControl(h,
            IOCTL_BTH_DISCONNECT_DEVICE,
            ref btAddr, 8,
            IntPtr.Zero, 0, out bytesReturned, IntPtr.Zero);

            if (!success)
            {
                int gle = Marshal.GetLastWin32Error();
                Console.WriteLine(string.Format(CultureInfo.InvariantCulture, "failure: {0} = 0x{0:X}.", gle));
            }
            else
            {
                Console.WriteLine("Success !");
            }
            while (!Console.KeyAvailable) System.Threading.Thread.Sleep(200);
        }
    }
}