WPF USB flash disk plug monitoring
Read the code directly and understand everything...
public class HookHandler
{
public void InitializeHook(Visual visual)
{
HwndSource hwndSource = PresentationSource.FromVisual(visual) as HwndSource;//窗口过程
if (hwndSource != null)
{
hwndSource.AddHook(new HwndSourceHook(WndProc));//挂钩
}
}
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:
HandleUSBHookMonition();
break;
case DBT_DEVICEREMOVECOMPLETE:
HandleUSBHookMonition();
break;
default:
break;
}
}
return IntPtr.Zero;
}
private void HandleUSBHookMonition()
{
}
}
How to use
private async void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
this.Loaded -= MainWindow_Loaded;
InitializeHook(this);
}
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