C＃如何知道可移动磁盘是USB驱动器还是SD卡？

Windows 7平台，C＃

我使用以下语句列出所有驱动器：

DriveInfo[] drives = DriveInfo.GetDrives(); 

然后我可以使用DriveType找出所有可移动磁盘：

 foreach (var drive in drives) { if(drive.DriveType == DriveType.Removable) yield return drive; } 

现在我的问题是，SD卡磁盘和USB闪存盘共享相同的driveType：可移动，那么我怎么才能找到USB闪存盘？

谢谢！

Answer 1

您可以利用ManagementObjectSearcher使用它来查询USB磁盘驱动器，然后获取相应的单位字母，并仅返回结果集中包含RootDirectory.Name的DriveInfo 。

使用LINQ查询表达式：

 static IEnumerable GetUsbDevices() { IEnumerable usbDrivesLetters = from drive in new ManagementObjectSearcher("select * from Win32_DiskDrive WHERE InterfaceType='USB'").Get().Cast() from o in drive.GetRelated("Win32_DiskPartition").Cast() from i in o.GetRelated("Win32_LogicalDisk").Cast() select string.Format("{0}\\", i["Name"]); return from drive in DriveInfo.GetDrives() where drive.DriveType == DriveType.Removable && usbDrivesLetters.Contains(drive.RootDirectory.Name) select drive; } 

使用LINQ扩展方法：

 static IEnumerable GetUsbDevices() { IEnumerable usbDrivesLetters = new ManagementObjectSearcher("select * from Win32_DiskDrive WHERE InterfaceType='USB'").Get().Cast() .SelectMany(drive => drive.GetRelated("Win32_DiskPartition").Cast()) .SelectMany(o => o.GetRelated("Win32_LogicalDisk").Cast()) .Select(i => Convert.ToString(i["Name"]) + "\\"); return DriveInfo.GetDrives().Where(drive => drive.DriveType == DriveType.Removable && usbDrivesLetters.Contains(drive.RootDirectory.Name)); } 

使用foreach：

 static IEnumerable GetUsbDrivesLetters() { foreach (ManagementObject drive in new ManagementObjectSearcher("select * from Win32_DiskDrive WHERE InterfaceType='USB'").Get()) foreach (ManagementObject o in drive.GetRelated("Win32_DiskPartition")) foreach (ManagementObject i in o.GetRelated("Win32_LogicalDisk")) yield return string.Format("{0}\\", i["Name"]); } static IEnumerable GetUsbDevices() { IEnumerable usbDrivesLetters = GetUsbDrivesLetters(); foreach (DriveInfo drive in DriveInfo.GetDrives()) if (drive.DriveType == DriveType.Removable && usbDrivesLetters.Contains(drive.RootDirectory.Name)) yield return drive; } 

要使用ManagementObject您需要添加对System.Management引用

我没有测试好，因为现在我没有任何SD卡，但我希望它有所帮助

Answer 2

我不得不在旧项目中检查USB设备，并解决它：

  Win32.DEV_BROADCAST_DEVICEINTERFACE deviceInterface; deviceInterface = (Win32.DEV_BROADCAST_DEVICEINTERFACE) string name = new string(deviceInterface.dbcc_name); Guid g = new Guid(deviceInterface.dbcc_classguid); if (g.ToString() == "a5dcbf10-6530-11d2-901f-00c04fb951ed") {*DO SOMETHING*} 

我得到GUID并检查设备GUID是否是USB-GUID。