如何使用WMI获取USB设备的驱动器号
本文关键字:驱动器 USB 何使用 WMI 获取 | 更新日期: 2023-09-27 18:07:14
我需要从c#应用程序中跟踪USB插入和删除事件,因此我基于so的其他问题提出了以下想法。
我不能用这个方法
var drives = DriveInfo.GetDrives()
.Where(drive => drive.IsReady && drive.DriveType == DriveType.Removable).ToList();
,因为当您需要区分已连接和未连接的设备时(新设备可以具有与以前缓存的设备相同的驱动器号和名称),它会导致很多麻烦。
所以我决定使用WMI来解决这个问题,但是我发现不可能通过Win32_USBHub
类获得指定USB设备的驱动器号。然后我想我可以执行另一个像这样的查询
foreach (ManagementObject device in new ManagementObjectSearcher(@"SELECT * FROM Win32_USBHub").Get())
{
string deviceID = (string)device.GetPropertyValue("DeviceID");
Console.WriteLine("{0}", deviceID);
string query = string.Format("SELECT * FROM Win32_LogicalDisk WHERE DeviceID='{0}'", deviceID);
foreach (ManagementObject o in new ManagementObjectSearcher(query).Get())
{
string name = (string)o.GetPropertyValue("Name");
Console.WriteLine("{0}", name);
}
Console.WriteLine("==================================");
}
,但它不工作-我得到一个异常"无效查询"每次当我试图执行查询与Win32_LogicalDisk
表工作。
为什么?我做错了什么?我该怎么修理它?也许有更好的方法来解决这个问题?
您会得到一个异常,因为您的deviceID
包含需要转义的字符(反斜杠)。使用简单的替换,你不应该得到异常。
string query = string.Format("SELECT * FROM Win32_LogicalDisk WHERE DeviceID='{0}'", deviceID.Replace(@"'", @"''"));
然而,从WMI获得USB驱动器号有点复杂。你需要通过一些课程,正如@MSalters在他的评论中发布的链接所述:
Win32_DiskDrive-> Win32_DiskDriveToDiskPartition -> Win32_DiskPartition -> Win32_LogicalDiskToPartition -> Win32_LogicalDisk.
在这里找到的一个小修改版本的代码为我工作:
foreach (ManagementObject device in new ManagementObjectSearcher(@"SELECT * FROM Win32_DiskDrive WHERE InterfaceType LIKE 'USB%'").Get())
{
Console.WriteLine((string)device.GetPropertyValue("DeviceID"));
Console.WriteLine((string)device.GetPropertyValue("PNPDeviceID"));
foreach (ManagementObject partition in new ManagementObjectSearcher(
"ASSOCIATORS OF {Win32_DiskDrive.DeviceID='" + device.Properties["DeviceID"].Value
+ "'} WHERE AssocClass = Win32_DiskDriveToDiskPartition").Get())
{
foreach (ManagementObject disk in new ManagementObjectSearcher(
"ASSOCIATORS OF {Win32_DiskPartition.DeviceID='"
+ partition["DeviceID"]
+ "'} WHERE AssocClass = Win32_LogicalDiskToPartition").Get())
{
Console.WriteLine("Drive letter " + disk["Name"]);
}
}
}
这是michalk对c# 8的回答的重构版本。
我将它与这个问题的答案结合使用,使用windows服务和c#检测USB驱动器插入和移除,相关问题
static IEnumerable<(string deviceId, string pnpDeviceId, string driveLetter)> SelectDeviceInformation()
{
foreach (ManagementObject device in SelectDevices())
{
var deviceId = (string)device.GetPropertyValue("DeviceID");
var pnpDeviceId = (string)device.GetPropertyValue("PNPDeviceID");
var driveLetter = (string)SelectPartitions(device).SelectMany(SelectDisks).Select(disk => disk["Name"]).Single();
yield return (deviceId, pnpDeviceId, driveLetter);
}
static IEnumerable<ManagementObject> SelectDevices() => new ManagementObjectSearcher(
@"SELECT * FROM Win32_DiskDrive WHERE InterfaceType LIKE 'USB%'").Get()
.Cast<ManagementObject>();
static IEnumerable<ManagementObject> SelectPartitions(ManagementObject device) => new ManagementObjectSearcher(
"ASSOCIATORS OF {Win32_DiskDrive.DeviceID=" +
"'" + device.Properties["DeviceID"].Value + "'} " +
"WHERE AssocClass = Win32_DiskDriveToDiskPartition").Get()
.Cast<ManagementObject>();
static IEnumerable<ManagementObject> SelectDisks(ManagementObject partition) => new ManagementObjectSearcher(
"ASSOCIATORS OF {Win32_DiskPartition.DeviceID=" +
"'" + partition["DeviceID"] + "'" +
"} WHERE AssocClass = Win32_LogicalDiskToPartition").Get()
.Cast<ManagementObject>();
}