c#使用wmi查询usb设备信息示例

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