C# I have a USB Hub of 10 USB slots connected to my USB Port. I want to get the USB device connected to the specific port.
Example: Two USB's are connected at Slot 3 and Slot 7. So, I want a list which will show Slot 3 and Slot 7 have USB and rest slot are empty.
I have tried using WMI Query Win32_USBHub. But here I am only getting 6 device id's and not 10. I am differentiating the ports using common VID for the Device ID.
But still even after getting the USB's connected to the specific port. I want to get their corresponding slot in which they are connected to USBHub.
I am not able to identify the slot in which the USB is connected and where the slot is empty.
ManagementObjectCollection collection;
var searcher = new ManagementObjectSearcher(@"Select * From Win32_USBHub");
collection = searcher.Get();
I would try to extract location information from the USB device (the same as in device manager)... I do not code in C# nor WMI but you should be able to obtain this kind of info with setupapi.h which is part of winapi (I think) I do it like this in C++/VCL:
#include <setupapi.h>
bool USBinfo()
{
int i,n;
AnsiString s,txt="";
DWORD dwSize,dwPropertyRegDataType;
HDEVINFO hDevInfo;
SP_DEVINFO_DATA DeviceInfoData;
TCHAR szDesc[1024];
// List all connected USB devices
hDevInfo = SetupDiGetClassDevs(NULL, TEXT("USB"), NULL, DIGCF_PRESENT|DIGCF_ALLCLASSES);
if (hDevInfo == INVALID_HANDLE_VALUE) return false;
for (i=0;;i++)
{
DeviceInfoData.cbSize = sizeof(DeviceInfoData);
if (!SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData)) break;
SetupDiGetDeviceRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_DEVICEDESC,&dwPropertyRegDataType, (BYTE*)szDesc,sizeof(szDesc),&dwSize);
s=szDesc; n=48; while (s.Length()<n) s+=" "; if (s.Length()>n) s=s.SubString(1,n); txt+=s+" "; // this just set constant string size to allign the columns to n chars
SetupDiGetDeviceRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_HARDWAREID,&dwPropertyRegDataType, (BYTE*)szDesc,sizeof(szDesc),&dwSize);
s=szDesc; if (s=="USB\\VID_????&PID_????REV_????")
{
// here you can do custom stuff for specific VID,PID just change the ???? in above line to your specific VID,PID,REV
}
s=szDesc; n=64; while (s.Length()<n) s+=" "; if (s.Length()>n) s=s.SubString(1,n); txt+=s+" ";
SetupDiGetDeviceRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_LOCATION_INFORMATION,&dwPropertyRegDataType, (BYTE*)szDesc,sizeof(szDesc),&dwSize);
s=szDesc; n=64; while (s.Length()<n) s+=" "; if (s.Length()>n) s=s.SubString(1,n); txt+=s+" ";
txt+="\r\n";
}
Main->mm_log->Lines->Add(txt); // this just output txt string to memo
return true;
}
Here output on my machine:
USB Root Hub USB\ROOT_HUB&VID1022&PID7807&REV0011 USB\ROOT_HUB&VID1022&PID7807&REV0011
USB Root Hub USB\ROOT_HUB&VID1022&PID7807&REV0011 USB\ROOT_HUB&VID1022&PID7807&REV0011
USB Root Hub USB\ROOT_HUB&VID1022&PID7809&REV0011 USB\ROOT_HUB&VID1022&PID7809&REV0011
USB Root Hub USB\ROOT_HUB20&VID1022&PID7808&REV0011 USB\ROOT_HUB20&VID1022&PID7808&REV0011
USB Root Hub USB\ROOT_HUB20&VID1022&PID7808&REV0011 USB\ROOT_HUB20&VID1022&PID7808&REV0011
USB Composite Device USB\VID_048D&PID_9006&REV_0200 Port_#0001.Hub_#0004
IT9135 BDA Device USB\VID_048D&PID_9006&REV_0200&MI_00 0000.0013.0002.001.000.000.000.000.000
USB Input Device USB\VID_048D&PID_9006&REV_0200&MI_01 0000.0013.0002.001.000.000.000.000.000
Canon LiDE 30 USB\VID_04A9&PID_220E&REV_0100 Port_#0005.Hub_#0001
American Power Conversion USB UPS USB\VID_051D&PID_0002&REV_0106 Port_#0001.Hub_#0001
USB Input Device USB\Vid_093A&Pid_2510&Rev_0100 USB Optical Mouse
USB Input Device USB\VID_413C&PID_2107&REV_0115 Port_#0002.Hub_#0001
As you can see the last column (3th) holds the info you want. Look inside setupapi.h for all the SPDRP_ defines you can use ... The only thing used from VCL is AnsiString so change it to any string type you have at your disposal.
This is not restricted to USB. If you want all the devices then change TEXT("USB") search parameter to NULL
hDevInfo = SetupDiGetClassDevs(NULL, NULL, NULL, DIGCF_PRESENT|DIGCF_ALLCLASSES);
