using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Management;
using?System.Text.Regularexpressions;
using?System.Windows.Forms;

namespace?test
{
????///?

????///?即插即用設備信息結構
????///?

?????
????public?struct?PnPEntityInfo
????{
????????public?String?PNPDeviceID;??????//?設備ID
????????public?String?Name;?????????????//?設備名稱
????????public?String?Description;??????//?設備描述
????????public?String?Service;??????????//?服務
????????public?String?Status;???????????//?設備狀態
????????public?UInt16?VendorID;?????????//?供應商標識
????????public?UInt16?ProductID;????????//?產品編號?
????????public?Guid?ClassGuid;??????????//?設備安裝類GUID
????}?
????///?

????///?基于WMI獲取USB設備信息
????///?

????public?partial?class?USB
????{
????????#region?UsbDevice
????????///?

????????///?獲取所有的USB設備實體（過濾沒有VID和PID的設備）
????????///?

????????public?static?PnPEntityInfo[]?AllUsbDevices
????????{
????????????get
????????????{
????????????????return?WhoUsbDevice（UInt16.MinValue?UInt16.MinValue?Guid.Empty）;
????????????}
????????}

????????///?

????????///?查詢USB設備實體（設備要求有VID和PID）
????????///?

????????///?供應商標識，MinValue忽視
????????///?產品編號，MinValue忽視
????????///?設備安裝類Guid，Empty忽視
????????///?設備列表

????????public?static??int?numb;//統計usb設備數量??????????
????????public?static?PnPEntityInfo[]?WhoUsbDevice（UInt16?VendorID?UInt16?ProductID?Guid?ClassGuid）
????????{
????????????numb?=?0;

????????????List?UsbDevices?=?new?List（）;

????????????//?獲取USB控制器及其相關聯的設備實體
????????????ManagementobjectCollection?USBControllerDeviceCollection?=?new?ManagementobjectSearcher（“SELECT?*?FROM?Win32_USBControllerDevice“）.Get（）;
????????????if?（USBControllerDeviceCollection?!=?null）
????????????{
????????????????foreach?（Managementobject?USBControllerDevice?in?USBControllerDeviceCollection）
????????????????{???//?獲取設備實體的DeviceID
????????????????????String?Dependent?=?（USBControllerDevice[“Dependent“]?as?String）.Split（new?Char[]?{?‘=‘?}）[1];

????????????????????//?過濾掉沒有VID和PID的USB設備
????????????????????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）;???//?供應商標識
????????????????????????if?（VendorID?!=?UInt16.MinValue?&&?VendorID?!=?theVendorID）?continue;

????????????????????????UInt16?theProductID?=?Convert.ToUInt16（match.Value.Substring（13?4）?16）;?//?產品編號
????????????????????????if?（ProductID?!=?UInt16.MinValue?&&?ProductID?!=?theProductID）?continue;

????????????????????????ManagementobjectCollection?PnPEntityCollection?=?new?ManagementobjectSearcher（“SELECT?*?FROM?Win32_PnPEntity?WHERE?DeviceID=“?+?Depend