如何获取系统序列号？

Question

from c # I got the system serial number with the help of this code (not me)

public static string getSystemSerialNumber()
{
    string mbInfo = string.Empty;
    ManagementScope scope = new ManagementScope(@"\\" + Environment.MachineName + @"\root\cimv2");
    scope.Connect();
    ManagementObject wmiClass = new ManagementObject(scope, new ManagementPath("Win32_BaseBoard.Tag=\"Base Board\""), new ObjectGetOptions());
    foreach (PropertyData propData in wmiClass.Properties)
    {
        if (propData.Name == "SerialNumber")
        {
            mbInfo = Convert.ToString(propData.Value);
            break;
        }
    }
    return mbInfo;
}

it returns the following string: /8ZBPX**/CN12966791****/, I want to get exactly string above but using c++ (windows10). i found this code :

system("wmic bios get serialnumber > sn.txt");
    wchar_t sn[16];

    FILE* fp = fopen("sn.txt", "r, ccs=UTF-8");
    fgetws(sn, 16, fp); //dummy read of first line
    fgetws(sn, 16, fp); //now sn contains 2nd line

    fclose(fp);          //cleanup temp file
    remove("sn.txt");

    printf("The serial Number is: %ws\n", sn);

and it returns the following string: 8ZBPX**, I didn't know how to find the information chain behind.

How can i get full system serial number in c++? Many thanks!

Answer 1

The SO answer you referenced: C++ How do I pass a system serial number into a variable?

references some MSDN links, one of which directs you to Example: Getting WMI Data from the Local Computer .

This article is a good starting point for creating your conversion of the ' getSystemSerialNumber ()' function from your question.

Taking the code from that article verbatim, you can change just a couple of lines to convert it to query for serial number (a few other comment lines and output lines should be changed as well for clarity/correctness).

You can then further modify the ' main ()' function to return the value to mimic your C# function.

Here's the modified version:

#define _WIN32_DCOM
#include <iostream>
using namespace std;
#include <comdef.h>
#include <Wbemidl.h>

#pragma comment(lib, "wbemuuid.lib")

int main(int argc, char** argv)
{
    HRESULT hres;

    // Step 1: --------------------------------------------------
    // Initialize COM. ------------------------------------------

    hres = CoInitializeEx(0, COINIT_MULTITHREADED);
    if (FAILED(hres))
    {
        cout << "Failed to initialize COM library. Error code = 0x"
            << hex << hres << endl;
        return 1;                  // Program has failed.
    }

    // Step 2: --------------------------------------------------
    // Set general COM security levels --------------------------

    hres = CoInitializeSecurity(
        NULL,
        -1,                          // COM authentication
        NULL,                        // Authentication services
        NULL,                        // Reserved
        RPC_C_AUTHN_LEVEL_DEFAULT,   // Default authentication 
        RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation  
        NULL,                        // Authentication info
        EOAC_NONE,                   // Additional capabilities 
        NULL                         // Reserved
    );


    if (FAILED(hres))
    {
        cout << "Failed to initialize security. Error code = 0x"
            << hex << hres << endl;
        CoUninitialize();
        return 1;                    // Program has failed.
    }

    // Step 3: ---------------------------------------------------
    // Obtain the initial locator to WMI -------------------------

    IWbemLocator* pLoc = NULL;

    hres = CoCreateInstance(
        CLSID_WbemLocator,
        0,
        CLSCTX_INPROC_SERVER,
        IID_IWbemLocator, (LPVOID*)&pLoc);

    if (FAILED(hres))
    {
        cout << "Failed to create IWbemLocator object."
            << " Err code = 0x"
            << hex << hres << endl;
        CoUninitialize();
        return 1;                 // Program has failed.
    }

    // Step 4: -----------------------------------------------------
    // Connect to WMI through the IWbemLocator::ConnectServer method

    IWbemServices* pSvc = NULL;

    // Connect to the root\cimv2 namespace with
    // the current user and obtain pointer pSvc
    // to make IWbemServices calls.
    hres = pLoc->ConnectServer(
        _bstr_t(L"ROOT\\CIMV2"), // Object path of WMI namespace
        NULL,                    // User name. NULL = current user
        NULL,                    // User password. NULL = current
        0,                       // Locale. NULL indicates current
        NULL,                    // Security flags.
        0,                       // Authority (for example, Kerberos)
        0,                       // Context object 
        &pSvc                    // pointer to IWbemServices proxy
    );

    if (FAILED(hres))
    {
        cout << "Could not connect. Error code = 0x"
            << hex << hres << endl;
        pLoc->Release();
        CoUninitialize();
        return 1;                // Program has failed.
    }

    cout << "Connected to ROOT\\CIMV2 WMI namespace" << endl;


    // Step 5: --------------------------------------------------
    // Set security levels on the proxy -------------------------

    hres = CoSetProxyBlanket(
        pSvc,                        // Indicates the proxy to set
        RPC_C_AUTHN_WINNT,           // RPC_C_AUTHN_xxx
        RPC_C_AUTHZ_NONE,            // RPC_C_AUTHZ_xxx
        NULL,                        // Server principal name 
        RPC_C_AUTHN_LEVEL_CALL,      // RPC_C_AUTHN_LEVEL_xxx 
        RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx
        NULL,                        // client identity
        EOAC_NONE                    // proxy capabilities 
    );

    if (FAILED(hres))
    {
        cout << "Could not set proxy blanket. Error code = 0x"
            << hex << hres << endl;
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return 1;               // Program has failed.
    }

    // Step 6: --------------------------------------------------
    // Use the IWbemServices pointer to make requests of WMI ----

    // Query the system board
    IEnumWbemClassObject* pEnumerator = NULL;
    hres = pSvc->ExecQuery(
        bstr_t("WQL"),
        bstr_t("SELECT * FROM Win32_Baseboard WHERE Tag = \"Base Board\""),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
        NULL,
        &pEnumerator);

    if (FAILED(hres))
    {
        cout << "Query for system board serial number failed."
            << " Error code = 0x"
            << hex << hres << endl;
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return 1;               // Program has failed.
    }

    // Step 7: -------------------------------------------------
    // Get the data from the query in step 6 -------------------

    IWbemClassObject* pclsObj = NULL;
    ULONG uReturn = 0;

    while (pEnumerator)
    {
        HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,
            &pclsObj, &uReturn);

        if (0 == uReturn)
        {
            break;
        }

        VARIANT vtProp;

        // Get the value of the Serial Number property
        hr = pclsObj->Get(L"SerialNumber", 0, &vtProp, 0, 0);
        wcout << " Serial Number : " << vtProp.bstrVal << endl;
        VariantClear(&vtProp);

        pclsObj->Release();
    }

    // Cleanup
    // ========

    pSvc->Release();
    pLoc->Release();
    pEnumerator->Release();
    CoUninitialize();

    return 0;   // Program successfully completed.

}

The effective lines that were changed are as follows:

1. You'll see that the SELECT statement looks similar to your C# ManagementPath constructor call:

    hres = pSvc->ExecQuery( bstr_t("WQL"), bstr_t("SELECT * FROM Win32_Baseboard WHERE Tag = \"Base Board\""), WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pEnumerator);

2. Query for the correct property:

    hr = pclsObj->Get(L"SerialNumber", 0, &vtProp, 0, 0);

I didn't tidy this up intentionally (there are so many opportunities, eg, using namespace std; needs to go, smart pointers should be used throughout, etc.), but left it intact so that you can compare to the original MSDN code.