[英]Find USB drive letter from VID/PID (Needed for XP and higher)
所以我想我會在這里包括最終答案,所以你不必理解這篇文章。 非常感謝Simon Mourier抽出時間來解決這個問題。
我的工作代碼
try
{
//Get a list of available devices attached to the USB hub
List<string> disks = new List<string>();
var usbDevices = GetUSBDevices();
//Enumerate the USB devices to see if any have specific VID/PID
foreach (var usbDevice in usbDevices)
{
if (usbDevice.DeviceID.Contains(USB_PID) && usbDevice.DeviceID.Contains(USB_VID))
{
foreach (string name in usbDevice.GetDiskNames())
{
//Open dialog to show file names
textbox1.Text = name.ToString();
}
}
}
所以只需使用原始問題中的GetUSBDevices
,然后包含Simon Mourier回答所顯示的兩個類,它應該不錯!
原始問題
我知道之前已經問過這個問題(見這里 )但是他們都沒有得到確認答案,我已經嘗試了所有建議的答案。 不幸的是,這些線程已經很久了,我希望有人能在這里給出更好的答案。
到目前為止,我有兩個“起點”,我將在下面展示。
選項1 :(獲取VID / PID但不是驅動器號)
我有一個嵌入式設備,我通過應用程序連接到該設備。 我有代碼可以成功掃描任何USB設備並檢查VID/PID
。 我成功檢測到我的設備,但我不知道如何獲取驅動器號。 有人可以幫我嗎? 我覺得我可以在class
添加另一行,但是當我通過Device Manager
我找不到任何描述驅動器號的屬性。
謝謝!
到目前為止,我將包含我的代碼。
private void tsDownload_Click(object sender, EventArgs e)
{
var usbDevices = GetUSBDevices();
foreach (var usbDevice in usbDevices)
{
if (usbDevice.DeviceID.Contains(USB_PID) && usbDevice.DeviceID.Contains(USB_VID))
{
//Find drive letter here
}
}
}
這些功能是:
static List<USBDeviceInfo> GetUSBDevices()
{
List<USBDeviceInfo> devices = new List<USBDeviceInfo>();
ManagementObjectCollection collection;
using (var searcher = new ManagementObjectSearcher(@"Select * From Win32_USBHub"))
collection = searcher.Get();
foreach (var device in collection)
{
devices.Add(new USBDeviceInfo(
(string)device.GetPropertyValue("DeviceID"),
(string)device.GetPropertyValue("PNPDeviceID"),
(string)device.GetPropertyValue("Description")
));
}
collection.Dispose();
return devices;
}
而且課程是:
class USBDeviceInfo
{
public USBDeviceInfo(string deviceID, string pnpDeviceID, string description)
{
this.DeviceID = deviceID;
this.PnpDeviceID = pnpDeviceID;
this.Description = description;
}
public string DeviceID { get; private set; }
public string PnpDeviceID { get; private set; }
public string Description { get; private set; }
}
選項2 :(獲取驅動器號而不是VID / PID)
foreach (ManagementObject drive in new ManagementObjectSearcher("select * from Win32_DiskDrive where InterfaceType='USB'").Get())
{
foreach(ManagementObject partition in new ManagementObjectSearcher("ASSOCIATORS OF {Win32_DiskDrive.DeviceID='" + drive["DeviceID"] + "'} WHERE AssocClass = Win32_DiskDriveToDiskPartition").Get())
{
foreach (ManagementObject disk in new ManagementObjectSearcher("ASSOCIATORS OF {Win32_DiskPartition.DeviceID='" + partition["DeviceID"] + "'} WHERE AssocClass = Win32_LogicalDiskToPartition").Get())
{
textBox1.Text = disk["Name"].ToString();
}
}
}
我要猜測VID / PID是在其中一個disk
對象屬性中,但我找不到哪一個。
我可能會弄錯,但似乎WMI不知道Windows設備安裝API中存在的父子關系。
因此,我創建了一個小型Device
實用程序類,可以從本機Setup API添加此缺少的鏈接。 以下是在原始USBDeviceInfo
類中使用它的方法:
class USBDeviceInfo
{
public USBDeviceInfo(string deviceID, string pnpDeviceID, string description)
{
this.DeviceID = deviceID;
this.PnpDeviceID = pnpDeviceID;
this.Description = description;
}
public string DeviceID { get; private set; }
public string PnpDeviceID { get; private set; }
public string Description { get; private set; }
public IEnumerable<string> GetDiskNames()
{
using (Device device = Device.Get(PnpDeviceID))
{
// get children devices
foreach (string childDeviceId in device.ChildrenPnpDeviceIds)
{
// get the drive object that correspond to this id (escape the id)
foreach (ManagementObject drive in new ManagementObjectSearcher("SELECT DeviceID FROM Win32_DiskDrive WHERE PNPDeviceID='" + childDeviceId.Replace(@"\", @"\\") + "'").Get())
{
// associate physical disks with partitions
foreach (ManagementObject partition in new ManagementObjectSearcher("ASSOCIATORS OF {Win32_DiskDrive.DeviceID='" + drive["DeviceID"] + "'} WHERE AssocClass=Win32_DiskDriveToDiskPartition").Get())
{
// associate partitions with logical disks (drive letter volumes)
foreach (ManagementObject disk in new ManagementObjectSearcher("ASSOCIATORS OF {Win32_DiskPartition.DeviceID='" + partition["DeviceID"] + "'} WHERE AssocClass=Win32_LogicalDiskToPartition").Get())
{
yield return (string)disk["DeviceID"];
}
}
}
}
}
}
}
這是新的Device類:
public sealed class Device : IDisposable
{
private IntPtr _hDevInfo;
private SP_DEVINFO_DATA _data;
private Device(IntPtr hDevInfo, SP_DEVINFO_DATA data)
{
_hDevInfo = hDevInfo;
_data = data;
}
public static Device Get(string pnpDeviceId)
{
if (pnpDeviceId == null)
throw new ArgumentNullException("pnpDeviceId");
IntPtr hDevInfo = SetupDiGetClassDevs(IntPtr.Zero, pnpDeviceId, IntPtr.Zero, DIGCF.DIGCF_ALLCLASSES | DIGCF.DIGCF_DEVICEINTERFACE);
if (hDevInfo == (IntPtr)INVALID_HANDLE_VALUE)
throw new Win32Exception(Marshal.GetLastWin32Error());
SP_DEVINFO_DATA data = new SP_DEVINFO_DATA();
data.cbSize = Marshal.SizeOf(data);
if (!SetupDiEnumDeviceInfo(hDevInfo, 0, ref data))
{
int err = Marshal.GetLastWin32Error();
if (err == ERROR_NO_MORE_ITEMS)
return null;
throw new Win32Exception(err);
}
return new Device(hDevInfo, data) {PnpDeviceId = pnpDeviceId};
}
public void Dispose()
{
if (_hDevInfo != IntPtr.Zero)
{
SetupDiDestroyDeviceInfoList(_hDevInfo);
_hDevInfo = IntPtr.Zero;
}
}
public string PnpDeviceId { get; private set; }
public string ParentPnpDeviceId
{
get
{
if (IsVistaOrHiger)
return GetStringProperty(DEVPROPKEY.DEVPKEY_Device_Parent);
uint parent;
int cr = CM_Get_Parent(out parent, _data.DevInst, 0);
if (cr != 0)
throw new Exception("CM Error:" + cr);
return GetDeviceId(parent);
}
}
private static string GetDeviceId(uint inst)
{
IntPtr buffer = Marshal.AllocHGlobal(MAX_DEVICE_ID_LEN + 1);
int cr = CM_Get_Device_ID(inst, buffer, MAX_DEVICE_ID_LEN + 1, 0);
if (cr != 0)
throw new Exception("CM Error:" + cr);
try
{
return Marshal.PtrToStringAnsi(buffer);
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}
public string[] ChildrenPnpDeviceIds
{
get
{
if (IsVistaOrHiger)
return GetStringListProperty(DEVPROPKEY.DEVPKEY_Device_Children);
uint child;
int cr = CM_Get_Child(out child, _data.DevInst, 0);
if (cr != 0)
return new string[0];
List<string> ids = new List<string>();
ids.Add(GetDeviceId(child));
do
{
cr = CM_Get_Sibling(out child, child, 0);
if (cr != 0)
return ids.ToArray();
ids.Add(GetDeviceId(child));
}
while (true);
}
}
private static bool IsVistaOrHiger
{
get
{
return (Environment.OSVersion.Platform == PlatformID.Win32NT && Environment.OSVersion.Version.CompareTo(new Version(6, 0)) >= 0);
}
}
private const int INVALID_HANDLE_VALUE = -1;
private const int ERROR_NO_MORE_ITEMS = 259;
private const int MAX_DEVICE_ID_LEN = 200;
[StructLayout(LayoutKind.Sequential)]
private struct SP_DEVINFO_DATA
{
public int cbSize;
public Guid ClassGuid;
public uint DevInst;
public IntPtr Reserved;
}
[Flags]
private enum DIGCF : uint
{
DIGCF_DEFAULT = 0x00000001,
DIGCF_PRESENT = 0x00000002,
DIGCF_ALLCLASSES = 0x00000004,
DIGCF_PROFILE = 0x00000008,
DIGCF_DEVICEINTERFACE = 0x00000010,
}
[DllImport("setupapi.dll", SetLastError = true)]
private static extern bool SetupDiEnumDeviceInfo(IntPtr DeviceInfoSet, uint MemberIndex, ref SP_DEVINFO_DATA DeviceInfoData);
[DllImport("setupapi.dll", CharSet = CharSet.Unicode, SetLastError = true)]
private static extern IntPtr SetupDiGetClassDevs(IntPtr ClassGuid, string Enumerator, IntPtr hwndParent, DIGCF Flags);
[DllImport("setupapi.dll")]
private static extern int CM_Get_Parent(out uint pdnDevInst, uint dnDevInst, uint ulFlags);
[DllImport("setupapi.dll")]
private static extern int CM_Get_Device_ID(uint dnDevInst, IntPtr Buffer, int BufferLen, uint ulFlags);
[DllImport("setupapi.dll")]
private static extern int CM_Get_Child(out uint pdnDevInst, uint dnDevInst, uint ulFlags);
[DllImport("setupapi.dll")]
private static extern int CM_Get_Sibling(out uint pdnDevInst, uint dnDevInst, uint ulFlags);
[DllImport("setupapi.dll")]
private static extern bool SetupDiDestroyDeviceInfoList(IntPtr DeviceInfoSet);
// vista and higher
[DllImport("setupapi.dll", SetLastError = true, EntryPoint = "SetupDiGetDevicePropertyW")]
private static extern bool SetupDiGetDeviceProperty(IntPtr DeviceInfoSet, ref SP_DEVINFO_DATA DeviceInfoData, ref DEVPROPKEY propertyKey, out int propertyType, IntPtr propertyBuffer, int propertyBufferSize, out int requiredSize, int flags);
[StructLayout(LayoutKind.Sequential)]
private struct DEVPROPKEY
{
public Guid fmtid;
public uint pid;
// from devpkey.h
public static readonly DEVPROPKEY DEVPKEY_Device_Parent = new DEVPROPKEY { fmtid = new Guid("{4340A6C5-93FA-4706-972C-7B648008A5A7}"), pid = 8 };
public static readonly DEVPROPKEY DEVPKEY_Device_Children = new DEVPROPKEY { fmtid = new Guid("{4340A6C5-93FA-4706-972C-7B648008A5A7}"), pid = 9 };
}
private string[] GetStringListProperty(DEVPROPKEY key)
{
int type;
int size;
SetupDiGetDeviceProperty(_hDevInfo, ref _data, ref key, out type, IntPtr.Zero, 0, out size, 0);
if (size == 0)
return new string[0];
IntPtr buffer = Marshal.AllocHGlobal(size);
try
{
if (!SetupDiGetDeviceProperty(_hDevInfo, ref _data, ref key, out type, buffer, size, out size, 0))
throw new Win32Exception(Marshal.GetLastWin32Error());
List<string> strings = new List<string>();
IntPtr current = buffer;
do
{
string s = Marshal.PtrToStringUni(current);
if (string.IsNullOrEmpty(s))
break;
strings.Add(s);
current += (1 + s.Length) * 2;
}
while (true);
return strings.ToArray();
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}
private string GetStringProperty(DEVPROPKEY key)
{
int type;
int size;
SetupDiGetDeviceProperty(_hDevInfo, ref _data, ref key, out type, IntPtr.Zero, 0, out size, 0);
if (size == 0)
return null;
IntPtr buffer = Marshal.AllocHGlobal(size);
try
{
if (!SetupDiGetDeviceProperty(_hDevInfo, ref _data, ref key, out type, buffer, size, out size, 0))
throw new Win32Exception(Marshal.GetLastWin32Error());
return Marshal.PtrToStringUni(buffer);
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}
}
我有同樣的問題,瀏覽WMI並沒有幫助我,真的。
但我最終得到了這幾行代碼,它對我很有用:
private string GetAvailableStorageDrive()
{
foreach (var info in System.IO.DriveInfo.GetDrives())
{
if (info.DriveType == System.IO.DriveType.Removable &&
info.IsReady &&
!info.Name.Equals("A:\\"))
{
return info.Name;
}
}
return string.Empty;
}
基本上,上面的函數查看DriveType
是否Removable
以及Drive是否准備就緒。 我還排除了驅動器號'A',因為在默認的Windows環境中,這是軟盤。
DriveType.Removable的描述:
該驅動器是可移動存儲設備,例如軟盤驅動器或USB閃存驅動器。
注意:正如CodeCaster所指出的,此功能還將返回可移動存儲設備,如SATA。 因此,如果是這種情況,您將不得不研究其他人提供的更復雜的解決方案。
有一個古老的Win32 API用於設備枚舉,它曾經是安裝程序API的一部分,但已經廢棄 - 我只知道它的存在,不是它的用法,但希望它會有所幫助:
http://msdn.microsoft.com/en-us/library/windows/hardware/ff551015(v=vs.85).aspx
SP_DEVICE_INTERFACE_DETAIL
結構是您的最終目標:它具有實際的設備路徑。 然而,到達那里的路徑......它都是PInvoke,從簽名看起來相當討厭,但這里有一些參考:
PInvoke簽名:
http://pinvoke.net/default.aspx/setupapi/SetupDiGetClassDevs.html http://pinvoke.net/default.aspx/setupapi/SetupDiEnumDeviceInterfaces.html http://pinvoke.net/default.aspx/setupapi/SetupDiGetDeviceInterfaceDetail。 HTML
結構映射:
http://pinvoke.net/default.aspx/Structures/SP_DEVICE_INTERFACE_DATA.html http://pinvoke.net/default.aspx/Structures/SP_DEVICE_INTERFACE_DETAIL_DATA.html
哦,我發現了一些示例用法(在C ++中,但可以翻譯):
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.