C# 移动设备插入检测

最新推荐文章于 2025-03-18 10:29:05 发布

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#c# #exception #存储

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本文介绍了一个Windows应用程序如何通过监听WM_DEVICECHANGE消息来检测移动存储设备的插入和移除。通过捕获不同类型的DBT事件，可以实现对USB等外部设备状态变化的响应。

public const int WM_DEVICECHANGE = 0x219;
        public const int DBT_DEVICEARRIVAL = 0x8000;
        public const int DBT_CONFIGCHANGECANCELED = 0x0019;
        public const int DBT_CONFIGCHANGED = 0x0018;
        public const int DBT_CUSTOMEVENT = 0x8006;
        public const int DBT_DEVICEQUERYREMOVE = 0x8001;
        public const int DBT_DEVICEQUERYREMOVEFAILED = 0x8002;
        public const int DBT_DEVICEREMOVECOMPLETE = 0x8004;
        public const int DBT_DEVICEREMOVEPENDING = 0x8003;
        public const int DBT_DEVICETYPESPECIFIC = 0x8005;
        public const int DBT_DEVNODES_CHANGED = 0x0007;
        public const int DBT_QUERYCHANGECONFIG = 0x0017;
        public const int DBT_USERDEFINED = 0xFFFF;
        protected override void WndProc(ref Message m)
        {
            try
            {
                if (m.Msg == WM_DEVICECHANGE)
                {
                    switch (m.WParam.ToInt32())
                    {
                        case WM_DEVICECHANGE:
                            break;
                        case DBT_DEVICEARRIVAL://插入移动存储设备
                            DriveInfo[] s = DriveInfo.GetDrives();
                            foreach (DriveInfo drive in s)
                            {
                                //if (drive.DriveType == DriveType.CDRom)
                                //你可以判断插入的是什么类型的移动存储设备,并且知道他的盘符,这样就可以在后台遍历所有文件夹跟文件了,后面怎么搞就你自己来搞了,复制文件到你指定的地方.
                            }
                            break;
                        case DBT_CONFIGCHANGECANCELED:
                            break;
                        case DBT_CONFIGCHANGED:
                            break;
                        case DBT_CUSTOMEVENT:
                            break;
                        case DBT_DEVICEQUERYREMOVE:
                            break;
                        case DBT_DEVICEQUERYREMOVEFAILED:
                            break;
                        case DBT_DEVICEREMOVECOMPLETE:
                            //卸载移动存储设备
                            break;
                        case DBT_DEVICEREMOVEPENDING:
                            break;
                        case DBT_DEVICETYPESPECIFIC:
                            break;
                        case DBT_DEVNODES_CHANGED:
                            break;
                        case DBT_QUERYCHANGECONFIG:
                            break;
                        case DBT_USERDEFINED:
                            break;
                        default:
                            break;
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            base.WndProc(ref m);
        }