开发环境：Visual Studio V2010 .NET Framework 4 Client Profile

namespace Splash.IO.PORTS
{
/// <summary>
/// 即插即用设备信息结构
/// </summary>
public struct PnPEntityInfo
{
public String PNPDeviceID;  // 设备ID
public String Name; // 设备名称
public String Description;  // 设备描述
public String Service;  // 服务
public String Status;   // 设备状态
public UInt16 VendorID; // 供应商标识
public UInt16 ProductID;// 产品编号
public Guid ClassGuid;  // 设备安装类GUID
}

/// <summary>
/// 基于WMI获取USB设备信息
/// </summary>
public partial class USB
{ 
#region UsbDevice
/// <summary>
/// 获取所有的USB设备实体（过滤没有VID和PID的设备）
/// </summary>
public static PnPEntityInfo[] AllUsbDevices
{
get
{
return WhoUsbDevice(UInt16.MinValue, UInt16.MinValue, Guid.Empty);
}
}

/// <summary>
/// 查询USB设备实体（设备要求有VID和PID）
/// </summary>
/// <param name=\"VendorID\">供应商标识，MinValue忽视</param>
/// <param name=\"ProductID\">产品编号，MinValue忽视</param>
/// <param name=\"ClassGuid\">设备安装类Guid，Empty忽视</param>
/// <returns>设备列表</returns>
public static PnPEntityInfo[] WhoUsbDevice(UInt16 VendorID, UInt16 ProductID, Guid ClassGuid)
{
List<PnPEntityInfo> UsbDevices = new List<PnPEntityInfo>();

// 获取USB控制器及其相关联的设备实体
ManagementObjectCollection USBControllerDeviceCollection = new ManagementObjectSearcher(\"SELECT * FROM Win32_USBControllerDevice\").Get();
if (USBControllerDeviceCollection != null)
{
foreach (ManagementObject USBControllerDevice in USBControllerDeviceCollection)
{   // 获取设备实体的DeviceID
String Dependent = (USBControllerDevice[\"Dependent\"] as String).Split(new Char[] { \'=\' })[1];

// 过滤掉没有VID和PID的USB设备
Match match = Regex.Match(Dependent, \"VID_[0-9|A-F]{4}&PID_[0-9|A-F]{4}\");
if (match.Success)
{
UInt16 theVendorID = Convert.ToUInt16(match.Value.Substring(4, 4), 16);   // 供应商标识
if (VendorID != UInt16.MinValue && VendorID != theVendorID) continue;

UInt16 theProductID = Convert.ToUInt16(match.Value.Substring(13, 4), 16); // 产品编号
if (ProductID != UInt16.MinValue && ProductID != theProductID) continue;

ManagementObjectCollection PnPEntityCollection = new ManagementObjectSearcher(\"SELECT * FROM Win32_PnPEntity WHERE DeviceID=\" + Dependent).Get();
if (PnPEntityCollection != null)
{
foreach (ManagementObject Entity in PnPEntityCollection)
{
Guid theClassGuid = new Guid(Entity[\"ClassGuid\"] as String);// 设备安装类GUID
if (ClassGuid != Guid.Empty && ClassGuid != theClassGuid) continue;

PnPEntityInfo Element;
Element.PNPDeviceID = Entity[\"PNPDeviceID\"] as String;  // 设备ID
Element.Name = Entity[\"Name\"] as String;// 设备名称
Element.Description = Entity[\"Description\"] as String;  // 设备描述
Element.Service = Entity[\"Service\"] as String;  // 服务
Element.Status = Entity[\"Status\"] as String;// 设备状态
Element.VendorID = theVendorID; // 供应商标识
Element.ProductID = theProductID;   // 产品编号
Element.ClassGuid = theClassGuid;   // 设备安装类GUID

UsbDevices.Add(Element);
}
}
}
}
}

if (UsbDevices.Count == 0) return null; else return UsbDevices.ToArray();
}

/// <summary>
/// 查询USB设备实体（设备要求有VID和PID）
/// </summary>
/// <param name=\"VendorID\">供应商标识，MinValue忽视</param>
/// <param name=\"ProductID\">产品编号，MinValue忽视</param>
/// <returns>设备列表</returns>
public static PnPEntityInfo[] WhoUsbDevice(UInt16 VendorID, UInt16 ProductID)
{
return WhoUsbDevice(VendorID, ProductID, Guid.Empty);
}

/// <summary>
/// 查询USB设备实体（设备要求有VID和PID）
/// </summary>
/// <param name=\"ClassGuid\">设备安装类Guid，Empty忽视</param>
/// <returns>设备列表</returns>
public static PnPEntityInfo[] WhoUsbDevice(Guid ClassGuid)
{
return WhoUsbDevice(UInt16.MinValue, UInt16.MinValue, ClassGuid);
}

/// <summary>
/// 查询USB设备实体（设备要求有VID和PID）
/// </summary>
/// <param name=\"PNPDeviceID\">设备ID，可以是不完整信息</param>
/// <returns>设备列表</returns>
public static PnPEntityInfo[] WhoUsbDevice(String PNPDeviceID)
{
List<PnPEntityInfo> UsbDevices = new List<PnPEntityInfo>();

// 获取USB控制器及其相关联的设备实体
ManagementObjectCollection USBControllerDeviceCollection = new ManagementObjectSearcher(\"SELECT * FROM Win32_USBControllerDevice\").Get();
if (USBControllerDeviceCollection != null)
{
foreach (ManagementObject USBControllerDevice in USBControllerDeviceCollection)
{   // 获取设备实体的DeviceID
String Dependent = (USBControllerDevice[\"Dependent\"] as String).Split(new Char[] { \'=\' })[1];
if (!String.IsNullOrEmpty(PNPDeviceID))
{   // 注意：忽视大小写
if (Dependent.IndexOf(PNPDeviceID, 1, PNPDeviceID.Length - 2, StringComparison.OrdinalIgnoreCase) == -1) continue;
}

// 过滤掉没有VID和PID的USB设备
Match match = Regex.Match(Dependent, \"VID_[0-9|A-F]{4}&PID_[0-9|A-F]{4}\");
if (match.Success)
{
ManagementObjectCollection PnPEntityCollection = new ManagementObjectSearcher(\"SELECT * FROM Win32_PnPEntity WHERE DeviceID=\" + Dependent).Get();
if (PnPEntityCollection != null)
{
foreach (ManagementObject Entity in PnPEntityCollection)
{
PnPEntityInfo Element;
Element.PNPDeviceID = Entity[\"PNPDeviceID\"] as String;  // 设备ID
Element.Name = Entity[\"Name\"] as String;// 设备名称
Element.Description = Entity[\"Description\"] as String;  // 设备描述
Element.Service = Entity[\"Service\"] as String;  // 服务
Element.Status = Entity[\"Status\"] as String;// 设备状态
Element.VendorID = Convert.ToUInt16(match.Value.Substring(4, 4), 16);   // 供应商标识  
Element.ProductID = Convert.ToUInt16(match.Value.Substring(13, 4), 16); // 产品编号 // 产品编号
Element.ClassGuid = new Guid(Entity[\"ClassGuid\"] as String);// 设备安装类GUID

UsbDevices.Add(Element);
}
}
}
}
}

if (UsbDevices.Count == 0) return null; else return UsbDevices.ToArray();
}

/// <summary>
/// 根据服务定位USB设备
/// </summary>
/// <param name=\"ServiceCollection\">要查询的服务集合</param>
/// <returns>设备列表</returns>
public static PnPEntityInfo[] WhoUsbDevice(String[] ServiceCollection)
{
if (ServiceCollection == null || ServiceCollection.Length == 0)
return WhoUsbDevice(UInt16.MinValue, UInt16.MinValue, Guid.Empty);

List<PnPEntityInfo> UsbDevices = new List<PnPEntityInfo>();

// 获取USB控制器及其相关联的设备实体
ManagementObjectCollection USBControllerDeviceCollection = new ManagementObjectSearcher(\"SELECT * FROM Win32_USBControllerDevice\").Get();
if (USBControllerDeviceCollection != null)
{
foreach (ManagementObject USBControllerDevice in USBControllerDeviceCollection)
{   // 获取设备实体的DeviceID
String Dependent = (USBControllerDevice[\"Dependent\"] as String).Split(new Char[] { \'=\' })[1];

// 过滤掉没有VID和PID的USB设备
Match match = Regex.Match(Dependent, \"VID_[0-9|A-F]{4}&PID_[0-9|A-F]{4}\");
if (match.Success)
{
ManagementObjectCollection PnPEntityCollection = new ManagementObjectSearcher(\"SELECT * FROM Win32_PnPEntity WHERE DeviceID=\" + Dependent).Get();
if (PnPEntityCollection != null)
{
foreach (ManagementObject Entity in PnPEntityCollection)
{
String theService = Entity[\"Service\"] as String;  // 服务
if (String.IsNullOrEmpty(theService)) continue;

foreach (String Service in ServiceCollection)
{   // 注意：忽视大小写
if (String.Compare(theService, Service, true) != 0) continue;

PnPEntityInfo Element;
Element.PNPDeviceID = Entity[\"PNPDeviceID\"] as String;  // 设备ID
Element.Name = Entity[\"Name\"] as String;// 设备名称
Element.Description = Entity[\"Description\"] as String;  // 设备描述
Element.Service = theService;   // 服务
Element.Status = Entity[\"Status\"] as String;// 设备状态
Element.VendorID = Convert.ToUInt16(match.Value.Substring(4, 4), 16);   // 供应商标识  
Element.ProductID = Convert.ToUInt16(match.Value.Substring(13, 4), 16); // 产品编号
Element.ClassGuid = new Guid(Entity[\"ClassGuid\"] as String);// 设备安装类GUID

UsbDevices.Add(Element);
break;
}
}
}
}
}
}

if (UsbDevices.Count == 0) return null; else return UsbDevices.ToArray();
}
#endregion

#region PnPEntity
/// <summary>
/// 所有即插即用设备实体（过滤没有VID和PID的设备）
/// </summary>
public static PnPEntityInfo[] AllPnPEntities
{
get
{
return WhoPnPEntity(UInt16.MinValue, UInt16.MinValue, Guid.Empty);
}
}

/// <summary>
/// 根据VID和PID及设备安装类GUID定位即插即用设备实体
/// </summary>
/// <param name=\"VendorID\">供应商标识，MinValue忽视</param>
/// <param name=\"ProductID\">产品编号，MinValue忽视</param>
/// <param name=\"ClassGuid\">设备安装类Guid，Empty忽视</param>
/// <returns>设备列表</returns>
/// <remarks>
/// HID：{745a17a0-74d3-11d0-b6fe-00a0c90f57da}
/// Imaging Device：{6bdd1fc6-810f-11d0-bec7-08002be2092f}
/// Keyboard：{4d36e96b-e325-11ce-bfc1-08002be10318}
/// Mouse：{4d36e96f-e325-11ce-bfc1-08002be10318}
/// Network Adapter：{4d36e972-e325-11ce-bfc1-08002be10318}
/// USB：{36fc9e60-c465-11cf-8056-444553540000}
/// </remarks>
public static PnPEntityInfo[] WhoPnPEntity(UInt16 VendorID, UInt16 ProductID, Guid ClassGuid)
{
List<PnPEntityInfo> PnPEntities = new List<PnPEntityInfo>();

// 枚举即插即用设备实体
String VIDPID;
if (VendorID == UInt16.MinValue)
{
if (ProductID == UInt16.MinValue)
VIDPID = \"\'%VID[_]____&PID[_]____%\'\";
else
VIDPID = \"\'%VID[_]____&PID[_]\" + ProductID.ToString(\"X4\") + \"%\'\";  
}
else
{
if (ProductID == UInt16.MinValue)
VIDPID = \"\'%VID[_]\" + VendorID.ToString(\"X4\") + \"&PID[_]____%\'\";
else
VIDPID = \"\'%VID[_]\" + VendorID.ToString(\"X4\") + \"&PID[_]\" + ProductID.ToString(\"X4\") + \"%\'\";
}

String QueryString;
if (ClassGuid == Guid.Empty)
QueryString = \"SELECT * FROM Win32_PnPEntity WHERE PNPDeviceID LIKE\" + VIDPID;
else
QueryString = \"SELECT * FROM Win32_PnPEntity WHERE PNPDeviceID LIKE\" + VIDPID + \" AND ClassGuid=\'\" + ClassGuid.ToString(\"B\") + \"\'\";

ManagementObjectCollection PnPEntityCollection = new ManagementObjectSearcher(QueryString).Get();
if (PnPEntityCollection != null)
{
foreach (ManagementObject Entity in PnPEntityCollection)
{
String PNPDeviceID = Entity[\"PNPDeviceID\"] as String;
Match match = Regex.Match(PNPDeviceID, \"VID_[0-9|A-F]{4}&PID_[0-9|A-F]{4}\");
if (match.Success)
{
PnPEntityInfo Element;

Element.PNPDeviceID = PNPDeviceID;  // 设备ID
Element.Name = Entity[\"Name\"] as String;// 设备名称
Element.Description = Entity[\"Description\"] as String;  // 设备描述
Element.Service = Entity[\"Service\"] as String;  // 服务
Element.Status = Entity[\"Status\"] as String;// 设备状态
Element.VendorID = Convert.ToUInt16(match.Value.Substring(4, 4), 16);   // 供应商标识
Element.ProductID = Convert.ToUInt16(match.Value.Substring(13, 4), 16); // 产品编号
Element.ClassGuid = new Guid(Entity[\"ClassGuid\"] as String);// 设备安装类GUID

PnPEntities.Add(Element);
}
}
}

if (PnPEntities.Count == 0) return null; else return PnPEntities.ToArray();
} 

/// <summary>
/// 根据VID和PID定位即插即用设备实体
/// </summary>
/// <param name=\"VendorID\">供应商标识，MinValue忽视</param>
/// <param name=\"ProductID\">产品编号，MinValue忽视</param>
/// <returns>设备列表</returns>
public static PnPEntityInfo[] WhoPnPEntity(UInt16 VendorID, UInt16 ProductID)
{
return WhoPnPEntity(VendorID, ProductID, Guid.Empty);
}

/// <summary>
/// 根据设备安装类GUID定位即插即用设备实体
/// </summary>
/// <param name=\"ClassGuid\">设备安装类Guid，Empty忽视</param>
/// <returns>设备列表</returns>
public static PnPEntityInfo[] WhoPnPEntity(Guid ClassGuid)
{
return WhoPnPEntity(UInt16.MinValue, UInt16.MinValue, ClassGuid);
}

/// <summary>
/// 根据设备ID定位设备
/// </summary>
/// <param name=\"PNPDeviceID\">设备ID，可以是不完整信息</param>
/// <returns>设备列表</returns>
/// <remarks>
/// 注意：对于下划线，需要写成“[_]”，否则视为任意字符
/// </remarks>
public static PnPEntityInfo[] WhoPnPEntity(String PNPDeviceID)
{
List<PnPEntityInfo> PnPEntities = new List<PnPEntityInfo>();

// 枚举即插即用设备实体
String QueryString;
if (String.IsNullOrEmpty(PNPDeviceID))
{
QueryString = \"SELECT * FROM Win32_PnPEntity WHERE PNPDeviceID LIKE \'%VID[_]____&PID[_]____%\'\";
}
else
{   // LIKE子句中有反斜杠字符将会引发WQL查询异常
QueryString = \"SELECT * FROM Win32_PnPEntity WHERE PNPDeviceID LIKE \'%\" + PNPDeviceID.Replace(\'\\\\\', \'_\') + \"%\'\";
}

ManagementObjectCollection PnPEntityCollection = new ManagementObjectSearcher(QueryString).Get();
if (PnPEntityCollection != null)
{
foreach (ManagementObject Entity in PnPEntityCollection)
{
String thePNPDeviceID = Entity[\"PNPDeviceID\"] as String;
Match match = Regex.Match(thePNPDeviceID, \"VID_[0-9|A-F]{4}&PID_[0-9|A-F]{4}\");
if (match.Success)
{
PnPEntityInfo Element;

Element.PNPDeviceID = thePNPDeviceID;   // 设备ID
Element.Name = Entity[\"Name\"] as String;// 设备名称
Element.Description = Entity[\"Description\"] as String;  // 设备描述
Element.Service = Entity[\"Service\"] as String;  // 服务
Element.Status = Entity[\"Status\"] as String;// 设备状态
Element.VendorID = Convert.ToUInt16(match.Value.Substring(4, 4), 16);   // 供应商标识
Element.ProductID = Convert.ToUInt16(match.Value.Substring(13, 4), 16); // 产品编号
Element.ClassGuid = new Guid(Entity[\"ClassGuid\"] as String);// 设备安装类GUID

PnPEntities.Add(Element);
}
}
}

if (PnPEntities.Count == 0) return null; else return PnPEntities.ToArray();
}

/// <summary>
/// 根据服务定位设备
/// </summary>
/// <param name=\"ServiceCollection\">要查询的服务集合，null忽视</param>
/// <returns>设备列表</returns>
/// <remarks>
/// 跟服务相关的类：
/// Win32_SystemDriverPNPEntity
/// Win32_SystemDriver
/// </remarks>
public static PnPEntityInfo[] WhoPnPEntity(String[] ServiceCollection)
{
if (ServiceCollection == null || ServiceCollection.Length == 0)
return WhoPnPEntity(UInt16.MinValue, UInt16.MinValue, Guid.Empty);

List<PnPEntityInfo> PnPEntities = new List<PnPEntityInfo>();

// 枚举即插即用设备实体
String QueryString = \"SELECT * FROM Win32_PnPEntity WHERE PNPDeviceID LIKE \'%VID[_]____&PID[_]____%\'\";
ManagementObjectCollection PnPEntityCollection = new ManagementObjectSearcher(QueryString).Get();
if (PnPEntityCollection != null)
{
foreach (ManagementObject Entity in PnPEntityCollection)
{
String PNPDeviceID = Entity[\"PNPDeviceID\"] as String;
Match match = Regex.Match(PNPDeviceID, \"VID_[0-9|A-F]{4}&PID_[0-9|A-F]{4}\");
if (match.Success)
{
String theService = Entity[\"Service\"] as String;// 服务
if (String.IsNullOrEmpty(theService)) continue;

foreach (String Service in ServiceCollection)
{   // 注意：忽视大小写
if (String.Compare(theService, Service, true) != 0) continue;

PnPEntityInfo Element;

Element.PNPDeviceID = PNPDeviceID;  // 设备ID
Element.Name = Entity[\"Name\"] as String;// 设备名称
Element.Description = Entity[\"Description\"] as String;  // 设备描述
Element.Service = theService;   // 服务
Element.Status = Entity[\"Status\"] as String;// 设备状态
Element.VendorID = Convert.ToUInt16(match.Value.Substring(4, 4), 16);   // 供应商标识
Element.ProductID = Convert.ToUInt16(match.Value.Substring(13, 4), 16); // 产品编号
Element.ClassGuid = new Guid(Entity[\"ClassGuid\"] as String);// 设备安装类GUID

PnPEntities.Add(Element);
break;
}
}
}
}

if (PnPEntities.Count == 0) return null; else return PnPEntities.ToArray();
}
#endregion
}
}