如何从 DEV_BROADCAST_DEVICEINTERFACE 和设备实例 ID 获取友好的设备名称

Question

我已使用 RegisterDeviceNotification 注册了一个窗口，并且可以成功接收 DEV_BROADCAST_DEVICEINTERFACE 消息。但是，返回的结构中的 dbcc_name 字段始终为空。我的结构定义如下：

[StructLayout(LayoutKind.Sequential)]
public struct DEV_BROADCAST_DEVICEINTERFACE
{
    public int dbcc_size;
    public int dbcc_devicetype;
    public int dbcc_reserved;
    public Guid dbcc_classguid;
    [MarshalAs(UnmanagedType.LPStr)]
    public string dbcc_name;
}

我在 WM_DEVICECHANGE 消息。

这应该有效吗？

或者甚至更好...是否有其他方法可以在连接时获取设备的名称？

编辑（02/05/2010 20:56GMT）：

我发现了如何通过这样做来填充 dbcc_name 字段：

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct DEV_BROADCAST_DEVICEINTERFACE
{
    public int dbcc_size;
    public int dbcc_devicetype;
    public int dbcc_reserved;
    public Guid dbcc_classguid;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst=255)]
    public string dbcc_name;
}

但我仍然需要一种方法来从什么中获取“友好”名称int dbcc_name。它看起来像下面这样：

\?\USB#VID_05AC&PID_1294​​&MI_00#0#{6bdd1fc6-810f-11d0-bec7-08002be2092f}

我真的只想说“Apple iPhone”（这就是本例中的设备）。

Answer 1

好吧，如上所述，我发现了如何正确填充 dbcc_name。我发现这是获取设备名称的最简单方法：

private static string GetDeviceName(DEV_BROADCAST_DEVICEINTERFACE dvi)
{
    string[] Parts = dvi.dbcc_name.Split('#');
    if (Parts.Length >= 3)
    {
        string DevType = Parts[0].Substring(Parts[0].IndexOf(@"?\") + 2);
        string DeviceInstanceId = Parts[1];
        string DeviceUniqueID = Parts[2];
        string RegPath = @"SYSTEM\CurrentControlSet\Enum\" + DevType + "\\" + DeviceInstanceId + "\\" + DeviceUniqueID;
        RegistryKey key = Registry.LocalMachine.OpenSubKey(RegPath);
        if (key != null)
        {
            object result = key.GetValue("FriendlyName");
            if (result != null)
                return result.ToString();
            result = key.GetValue("DeviceDesc");
            if (result != null)
                return result.ToString();
        }
    }
    return String.Empty;
}

Answer 2

还可以通过 SetupAPI。将 dbcc_name 传递给 SetupDiOpenDeviceInterface，并通过传入 SPDRP_FRIENDLYNAME 的 SetupDiGetDeviceRegistryProperty 获取友好名称。

这里有一些 Delphi 代码可以做到这一点。 （抱歉，您必须独立翻译为 C#）。

function ConvertDbccNameToFriendlyName(aDeviceInterfaceDbccName : string) : string;
var
  deviceInfoHandle : HDEVINFO;
  deviceInfoData : SP_DEVINFO_DATA;
  deviceInterfaceData : SP_DEVICE_INTERFACE_DATA;
  deviceInstanceId : string;
  memberIndex : Cardinal;
begin
  result := '';

  // Create a new empty "device info set"
  deviceInfoHandle := SetupDiCreateDeviceInfoList(nil, 0);
  if deviceInfoHandle <> INVALID_HANDLE_VALUE then
  begin
    try
      // Add "aDeviceInterfaceDbccName" to the device info set
      FillChar(deviceInterfaceData, SizeOf(deviceInterfaceData), 0);
      deviceInterfaceData.cbSize := SizeOf(deviceInterfaceData);
      if SetupDiOpenDeviceInterface(deviceInfoHandle, PChar(aDeviceInterfaceDbccName),     0, @deviceInterfaceData) then
      begin
        try
          // iterate over the device info set
          // (though I only expect it to contain one item)
          memberIndex := 0;
          while true do
          begin
            // get device info that corresponds to the next memberIndex
            FillChar(deviceInfoData, SizeOf(deviceInfoData), 0);
            deviceInfoData.cbSize := SizeOf(deviceInfoData);
            if not SetupDiEnumDeviceInfo(deviceInfoHandle, memberIndex, deviceInfoData) then
            begin
              // The enumerator is exhausted when SetupDiEnumDeviceInfo returns false
              break;
            end
            else
            begin
              Inc(memberIndex);
            end;

            // Get the friendly name for that device info
            if TryGetDeviceFriendlyName(deviceInfoHandle, deviceInfoData, {out} friendlyName) then
            begin
              result := friendlyName;
              break;
            end;
          end;
        finally
          SetupDiDeleteDeviceInterfaceData(deviceInfoHandle, deviceInterfaceData);
        end;
      end;
    finally
      SetupDiDestroyDeviceInfoList(deviceInfoHandle);
    end;
  end;
end;

function TryGetDeviceFriendlyName(
  var aDeviceInfoHandle : HDEVINFO;
  var aDeviceInfoData : SP_DEVINFO_DATA;
  out aFriendlyName : string) : boolean;
var
  valueBuffer : array of byte;
  regProperty : Cardinal;
  propertyRegDataType : DWord;
  friendlyNameByteSize : Cardinal;
  success : boolean;
begin
  aFriendlyName := '';
  result := false;

  // Get the size of the friendly device name
  regProperty := SPDRP_FRIENDLYNAME;
  friendlyNameByteSize := 0;
  SetupDiGetDeviceRegistryProperty(
    aDeviceInfoHandle,     // handle to device information set
    aDeviceInfoData,       // pointer to SP_DEVINFO_DATA structure
    regProperty,           // property to be retrieved
    propertyRegDataType,   // pointer to variable that receives the data type of the property
    nil,                   // pointer to PropertyBuffer that receives the property
    0,                     // size, in bytes, of the PropertyBuffer buffer.
    friendlyNameByteSize); // pointer to variable that receives the required size of PropertyBuffer

  // Prepare a buffer for the friendly device name (plus space for a null terminator)
  SetLength(valueBuffer, friendlyNameByteSize + sizeof(char));

  success := SetupDiGetDeviceRegistryProperty(
    aDeviceInfoHandle,
    aDeviceInfoData,
    regProperty,
    propertyRegDataType,
    @valueBuffer[0],
    friendlyNameByteSize,
    friendlyNameByteSize);

  if success then
  begin
    // Ensure that only 'friendlyNameByteSize' bytes are used.
    // Ensure that the string is null-terminated.
    PChar(@valueBuffer[friendlyNameByteSize])^ := char(0);

    // Get the returned value as a string
    aFriendlyName := StrPas(PChar(@valueBuffer[0]));
  end;

  result := success;
end;

最后...如果您需要一种唯一标识 USB 设备的方法（不是您所要求的，但通常也是需要的），请查看 SetupDiGetDeviceInstanceId。

Answer 3

您可能需要稍微更改一下

[StructLayout(LayoutKind.Sequential)]
public struct DEV_BROADCAST_DEVICEINTERFACE
{
    public int dbcc_size;
    public int dbcc_devicetype;
    public int dbcc_reserved;
    public Guid dbcc_classguid;
    [MarshalAs(UnmanagedType.LPStr)]
    public StringBuilder dbcc_name;
}

将 dbcc_size 设置为 255，并构造 StringBuilder，如下所示：

DEV_BROADCAST_DEVICEINTERFACE dbd = new DEV_BROADCAST_DEVICEINTERFACE;
dbd.dbcc_size = 255;
dbd.dbcc_name = new StringBuilder(dbd.dbcc_size);

然后传入该结构，应填充 dbcc_name 的值。

编辑：在窃笑的评论之后...我想到了另一种方式...

public struct DEV_BROADCAST_DEVICEINTERFACE
{
    public int dbcc_size;
    public int dbcc_devicetype;
    public int dbcc_reserved;
    public Guid dbcc_classguid;
[System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst = 255, ArraySubType = System.Runtime.InteropServices.UnmanagedType.LPArray)]
    public string dbcc_name;
}

设置dbcc_size到 255，然后从那里获取...

编辑#2：这很有趣...现在不太确定，我发现这篇文章在<上使用了RegisterDeviceNotification a href="http://www.codeproject.com/KB/system/DriveDetector.aspx" rel="nofollow noreferrer">Codeproject ，它使用不同的 RegisterDeviceNotification 方式，该结构被编组为IntPtr 用于调用API...

Answer 4

解析设备实例的设备接口不是一个好主意。

DEVPKEY_NAME 是您的最佳查询应该做的。

首先，您必须将设备接口名称转换为设备实例 ID。

像这样的SetupAPI：

void GetDeviceInstanceId(const wchar_t* device_interface, wchar_t* instance_id, size_t len)
{
  HDEVINFO devinfo;
  SP_DEVICE_INTERFACE_DATA interface_data;
  SP_DEVINFO_DATA device_data;
  
  devinfo = SetupDiCreateDeviceInfoList(NULL, NULL);
  
  memset(interface_data, 0, sizeof(interface_data));
  interface_data.cbSize = sizeof(interface_data);
  SetupDiOpenDeviceInterface(&devinfo, device_interface, 0, interface_data);
  
  memset(device_data, 0, sizeof(device_data));
  device_data.cbSize = sizeof(device_data);
  SetupDiGetDeviceInterfaceDetail(devinfo, interface_data, NULL, 0, NULL, device_data);
  
  SetupDiGetDeviceProperty(devinfo, device_data, DEVPKEY_Device_InstanceId, DEVPROP_TYPE_STRING, instance_id, len);
  // alternatively:
  //SetupDiGetDeviceInstanceId(devinfo, device_data, instance_id, len);

  SetupDiDeleteDeviceInterfaceData(devinfo, interface_data);
  SetupDiDestroyDeviceInfoList(devinfo);
}

void GetDeviceName(const wchar_t *instance_id, wchar_t *name, size_t len)
{
  HDEVINFO devinfo;
  SP_DEVINFO_DATA device_data;
  
  memset(device_data, 0, sizeof(device_data));
  device_data.cbSize = sizeof(device_data);
  SetupDiOpenDeviceInfo(devinfo, instance_id, NULL, 0, device_data);

  SetupDiGetDeviceProperty(devinfo, &device_data, DEVPKEY_NAME, DEVPROP_TYPE_STRING, name, len, 0);
  
  SetupDiDestroyDeviceInfoList(devinfo);
}

或者使用 更现代的cfgmgr32 API：

void GetDeviceInstanceId(const wchar_t* device_interface, wchar_t *buffer, size_t len)
{
  DEVPROPTYPE type = DEVPROP_TYPE_STRING;

  CM_Get_Device_Interface_Property(device_interface, &DEVPKEY_Device_InstanceId, &type, (PBYTE)buffer, len, 0); // CR_SUCCESS
}

void GetDeviceName(const wchar_t *instance_id, wchar_t *buffer, size_t len)
{
  DEVINST device;
  DEVPROPTYPE type = DEVPROP_TYPE_STRING;
  
  CM_Locate_DevNode(&device, instance_id, 0); // CR_SUCCESS
  CM_Get_DevNode_Property(device, &DEVPKEY_NAME, &type, (PBYTE)buffer, len, 0); // CR_SUCCESS
}