Find specific slot no of the USB Hub(10 slots) where USB is connected or not. I want to get the specific slot no where USB is connected or not

Question

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

Answer 1

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 
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=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=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=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);