操作USB设备

来源：互联网发布：中原地产知乎编辑：程序博客网时间：2024/06/08 10:02
using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Runtime.InteropServices;using System.Text;using System.Threading.Tasks;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Interop;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Shapes; namespace Wpf_DataGrid_RowDragAndDrop{    /// <summary>    /// WinUpan.xaml 的交互逻辑    /// </summary>    public partial class WinUpan : Window    {        public WinUpan()        {            InitializeComponent();        }         private void Window_Loaded(object sender, RoutedEventArgs e)        {            /*WPF中处理消息首先要获取窗口句柄，创建HwndSource对象 通过HwndSource对象添加             * 消息处理回调函数.HwndSource类: 实现其自己的窗口过程。 创建窗口之后使用 AddHook              * 和 RemoveHook 来添加和移除挂钩，接收所有窗口消息。*/             HwndSource hwndSource = PresentationSource.FromVisual(this) as HwndSource;//窗口过程            if (hwndSource != null)            {                hwndSource.AddHook(new HwndSourceHook(WndProc));//挂钩            }        }        string panfu = "";        public const int WM_DEVICECHANGE = 0x219;//U盘插入后，OS的底层会自动检测到，然后向应用程序发送“硬件设备状态改变“的消息        public const int DBT_DEVICEARRIVAL = 0x8000;  //就是用来表示U盘可用的。一个设备或媒体已被插入一块，现在可用。        public const int DBT_CONFIGCHANGECANCELED = 0x0019;  //要求更改当前的配置（或取消停靠码头）已被取消。        public const int DBT_CONFIGCHANGED = 0x0018;  //当前的配置发生了变化，由于码头或取消固定。        public const int DBT_CUSTOMEVENT = 0x8006; //自定义的事件发生。 的Windows NT 4.0和Windows 95：此值不支持。        public const int DBT_DEVICEQUERYREMOVE = 0x8001;  //审批要求删除一个设备或媒体作品。任何应用程序也不能否认这一要求，并取消删除。        public const int DBT_DEVICEQUERYREMOVEFAILED = 0x8002;  //请求删除一个设备或媒体片已被取消。        public const int DBT_DEVICEREMOVECOMPLETE = 0x8004;  //一个设备或媒体片已被删除。        public const int DBT_DEVICEREMOVEPENDING = 0x8003;  //一个设备或媒体一块即将被删除。不能否认的。        public const int DBT_DEVICETYPESPECIFIC = 0x8005;  //一个设备特定事件发生。        public const int DBT_DEVNODES_CHANGED = 0x0007;  //一种设备已被添加到或从系统中删除。        public const int DBT_QUERYCHANGECONFIG = 0x0017;  //许可是要求改变目前的配置（码头或取消固定）。        public const int DBT_USERDEFINED = 0xFFFF;  //此消息的含义是用户定义的        public const uint GENERIC_READ = 0x80000000;        public const int GENERIC_WRITE = 0x40000000;        public const int FILE_SHARE_READ = 0x1;        public const int FILE_SHARE_WRITE = 0x2;        public const int IOCTL_STORAGE_EJECT_MEDIA = 0x2d4808;        private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)        {            if (msg == WM_DEVICECHANGE)            {                switch (wParam.ToInt32())                {                    case DBT_DEVICEARRIVAL:                        DriveInfo[] s = DriveInfo.GetDrives();                        s.Any(t =>                        {                            if (t.DriveType == DriveType.Removable)                            {                                panfu = t.Name;                                MessageBox.Show("U盘插入,盘符为：" + t.Name);                                DirSearch(t.RootDirectory.FullName);                                return true;                            }                            return false;                        });                        break;                    case DBT_DEVICEREMOVECOMPLETE:                        MessageBox.Show("U盘卸载");                        break;                    default:                        break;                }            }            return IntPtr.Zero;        }         private void DirSearch(string path)        {            try            {                foreach (string f in Directory.GetFiles(path))                {                    listview.Items.Add(f);                }                foreach (string d in Directory.GetDirectories(path))                {                    DirSearch(d);                }            }            catch (Exception)            {                 throw;            }        }         private void Button_Click(object sender, RoutedEventArgs e)        {            //第一个参数filename与普通文件名有所不同，设备驱动的“文件名”(常称为“设备路径”)形式固定为“\\.\DeviceName”, 如 string filename = @"\\.\I:";            string filename = @"\\.\" + panfu.Remove(2);            //打开设备，得到设备的句柄handle.            IntPtr handle = CreateFile(filename, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, IntPtr.Zero, 0x3, 0, IntPtr.Zero);             // 向目标设备发送设备控制码，也就是发送命令。IOCTL_STORAGE_EJECT_MEDIA  弹出U盘。            uint byteReturned;            bool result = DeviceIoControl(handle, IOCTL_STORAGE_EJECT_MEDIA, IntPtr.Zero, 0, IntPtr.Zero, 0, out byteReturned, IntPtr.Zero);             MessageBox.Show(result ? "U盘已退出" : "U盘退出失败");         }        [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]        private static extern IntPtr CreateFile(         string lpFileName,         uint dwDesireAccess,         uint dwShareMode,         IntPtr SecurityAttributes,         uint dwCreationDisposition,         uint dwFlagsAndAttributes,         IntPtr hTemplateFile);         [DllImport("kernel32.dll", ExactSpelling = true, SetLastError = true, CharSet = CharSet.Auto)]        private static extern bool DeviceIoControl(            IntPtr hDevice,            uint dwIoControlCode,            IntPtr lpInBuffer,            uint nInBufferSize,            IntPtr lpOutBuffer,            uint nOutBufferSize,            out uint lpBytesReturned,            IntPtr lpOverlapped        );    }}
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