/// <summary>
/// 获取USB HUB节点信息
/// </summary>
/// <param name="DevicePath">USB HUB设备路径</param>
/// <returns>节点信息</returns>
public static UsbNodeInformation[] GetUsbNodeInformation(String DevicePath)
{
if (String.IsNullOrEmpty(DevicePath))
{
return(null);
}
// 打开设备文件
IntPtr hHubDevice = Kernel32.CreateFile(
"\\\\.\\" + DevicePath,
NativeFileAccess.GENERIC_WRITE,
NativeFileShare.FILE_SHARE_WRITE,
IntPtr.Zero,
NativeFileMode.OPEN_EXISTING,
IntPtr.Zero,
IntPtr.Zero);
if (hHubDevice == Kernel32.INVALID_HANDLE_VALUE)
{
return(null);
}
// 查询节点信息
Int32 nBytesReturned;
USB_NODE_INFORMATION Buffer = new USB_NODE_INFORMATION();
Boolean Status = DeviceIoControl(hHubDevice,
IOCTL_USB_GET_NODE_INFORMATION,
ref Buffer,
Marshal.SizeOf(Buffer),
ref Buffer,
Marshal.SizeOf(Buffer),
out nBytesReturned,
IntPtr.Zero);
// 关闭设备文件
Kernel32.CloseHandle(hHubDevice);
if (!Status)
{
return(null);
}
UsbNodeInformation Node = new UsbNodeInformation();
Node.NodeType = Buffer.NodeType; // 节点类型
Node.PNPDeviceID = DevicePath.Substring(0, DevicePath.LastIndexOf('#')).Replace('#', '\\'); // 设备ID
Node.DevicePath = DevicePath; // 设备路径
Node.Name = GetUsbHubName(DevicePath); // 设备名称
if (Buffer.NodeType == USB_HUB_NODE.UsbHub)
{
Node.NumberOfPorts = Buffer.u.HubInformation.HubDescriptor.bNumberOfPorts; // 端口数
Node.HubIsBusPowered = Convert.ToBoolean(Buffer.u.HubInformation.HubIsBusPowered); // 供电方式
Node.HubCharacteristics = Buffer.u.HubInformation.HubDescriptor.wHubCharacteristics;
Node.PowerOnToPowerGood = Buffer.u.HubInformation.HubDescriptor.bPowerOnToPowerGood;
Node.HubControlCurrent = Buffer.u.HubInformation.HubDescriptor.bHubControlCurrent;
}
else
{
Node.NumberOfInterfaces = Buffer.u.MiParentInformation.NumberOfInterfaces; // 接口数
}
return(new UsbNodeInformation[1] {
Node
});
}
/// <summary>
/// 获取USB HUB节点信息
/// </summary>
/// <param name="DevicePath">USB HUB设备路径</param>
/// <returns>节点信息</returns>
public static UsbNodeInformation[] GetUsbNodeInformation(String DevicePath)
{
if (String.IsNullOrEmpty(DevicePath)) return null;
// 打开设备文件
IntPtr hHubDevice = Kernel32.CreateFile(
"\\\\.\\" + DevicePath,
NativeFileAccess.GENERIC_WRITE,
NativeFileShare.FILE_SHARE_WRITE,
IntPtr.Zero,
NativeFileMode.OPEN_EXISTING,
IntPtr.Zero,
IntPtr.Zero);
if (hHubDevice == Kernel32.INVALID_HANDLE_VALUE) return null;
// 查询节点信息
Int32 nBytesReturned;
USB_NODE_INFORMATION Buffer = new USB_NODE_INFORMATION();
Boolean Status = DeviceIoControl(hHubDevice,
IOCTL_USB_GET_NODE_INFORMATION,
ref Buffer,
Marshal.SizeOf(Buffer),
ref Buffer,
Marshal.SizeOf(Buffer),
out nBytesReturned,
IntPtr.Zero);
// 关闭设备文件
Kernel32.CloseHandle(hHubDevice);
if (!Status) return null;
UsbNodeInformation Node = new UsbNodeInformation();
Node.NodeType = Buffer.NodeType; // 节点类型
Node.PNPDeviceID = DevicePath.Substring(0, DevicePath.LastIndexOf('#')).Replace('#', '\\'); // 设备ID
Node.DevicePath = DevicePath; // 设备路径
Node.Name = GetUsbHubName(DevicePath); // 设备名称
if (Buffer.NodeType == USB_HUB_NODE.UsbHub)
{
Node.NumberOfPorts = Buffer.u.HubInformation.HubDescriptor.bNumberOfPorts; // 端口数
Node.HubIsBusPowered = Convert.ToBoolean(Buffer.u.HubInformation.HubIsBusPowered); // 供电方式
Node.HubCharacteristics = Buffer.u.HubInformation.HubDescriptor.wHubCharacteristics;
Node.PowerOnToPowerGood = Buffer.u.HubInformation.HubDescriptor.bPowerOnToPowerGood;
Node.HubControlCurrent = Buffer.u.HubInformation.HubDescriptor.bHubControlCurrent;
}
else
{
Node.NumberOfInterfaces = Buffer.u.MiParentInformation.NumberOfInterfaces; // 接口数
}
return new UsbNodeInformation[1] { Node };
}
