在Windows中以USB编程方式区分USB软盘驱动器和USB闪存驱动器 [英] Programmatically differentiating between USB Floppy Drive and USB Flash Drive in Windows

问题描述

在Windows（XP-7）上，是否有一种可靠的方法在C ++中对USB软盘驱动器和USB闪存驱动器进行编程区分？

On Windows (XP-7), is there a reliable way of programatically differentiating between USB floppy drives and USB flash drives in C++?

使用WMI在新的 <$ c $检测到c> Win32_LogicalDisk 实例，然后使用LogicalDisk对象的DriveType属性计算出基本类型。这工作得很好，除了软盘驱动器和USB闪存驱动器都是DriveType DRIVE_REMOVABLE ，所以为了区分这些（软盘和闪存），我使用< a href =http://msdn.microsoft.com/en-us/library/aa510113.aspx =nofollow> IOCTL_STORAGE_GET_HOTPLUG_INFO 介面找出设备是否可热插拔，并且正在工作，这意味着它是一个闪存驱动器，而不是软盘。再次，我认为这是非常好的（如果一点效率低，使用WDK API和WMI获取信息）在内部软盘驱动器的情况下，但不幸的是USB软盘驱动器也是很多时间可热插拔，所以有没有明确的方法来区分闪存和USB软盘驱动器，我可以看到。我知道有属性可以工作，如检查其映射到保留的驱动器A：或B（编辑：只有相关，如果机器绝对有一个软盘驱动器 - 参见 MS-KB：如何在Windows XP中更改驱动器号分配）或查看说明，但我真的很喜欢一些更可靠的。

At the moment, I'm using WMI to get updates when new Win32_LogicalDisk instances are detected, and then using the DriveType attribute of the LogicalDisk object to figure out a basic type. This works quite well, except that floppy drives and USB flash drives are both of DriveType DRIVE_REMOVABLE, so to differentiate between those (floppy vs. flash), I'm using the IOCTL_STORAGE_GET_HOTPLUG_INFO interface to figure out if the device is hotpluggable, and was working on the principal that that meant it was a flash drive and not a floppy. Again, I think this works quite well (if a little inefficient, using both the WDK API and WMI to get info ) in the case of internal floppy drives, but unfortunately USB Floppy drives are also hotpluggable a lot of the time, so there is no clear way to differentiate between flash and USB floppy drives, that I can see. I know there are properties that may work, like checking if its mapped to the reserved drives A: or B (edit: only relevant if the machine definitely has a floppy drive - see MS-KB: How to change drive letter assignments in Windows XP), or looking at the description, but I'd really like something a bit more reliable.

对长期的解释很抱歉，但只是想清楚！感谢

Sorry about the long explanation, but just wanted to be clear! Thanks

推荐答案

您尝试过Win32_LogicalDisk.MediaType吗？它有软盘的特定枚举。确保您在驱动器中没有磁盘时尝试。

Did you try Win32_LogicalDisk.MediaType? It has specific enumerations for floppy disks. Make sure you try it when there's no disk in the drive.

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