Export (0) Print
Expand All
Expand Minimize

Version Property Example (VC++)

This example uses the Version property of a Connection object to display the current ADO version. It also uses several dynamic properties to show:

  • Current DBMS name and version.

  • OLE DB version.

  • Provider name and version.

  • ODBC version.

  • ODBC driver name and version.

Note Note

If you are connecting to a data source provider that supports Windows authentication, you should specify Trusted_Connection=yes or Integrated Security = SSPI instead of user ID and password information in the connection string.

// BeginVersionCpp.cpp
// compile with: /EHsc
#import "msado15.dll" no_namespace rename("EOF", "EndOfFile")

#include <ole2.h>
#include <stdio.h>
#include <conio.h>

// Function declarations
inline void TESTHR(HRESULT x) { if FAILED(x) _com_issue_error(x); };
void VersionX();
void PrintProviderError(_ConnectionPtr pConnection);
void PrintComError(_com_error &e);

int main() {
    if (FAILED(::CoInitialize(NULL)))
        return -1;

    VersionX();

    ::CoUninitialize();
}

void VersionX() {
    HRESULT hr = S_OK;

   _bstr_t strCnn("Provider='sqloledb'; Data Source='My_Data_Source'; Initial Catalog='pubs'; Integrated Security='SSPI';");

    // Define ADO object pointers.  Initialize pointers on define.
    // These are in the ADODB::  namespace.
    _ConnectionPtr pConnection = NULL;

    try {
        // Open connection.
        TESTHR(pConnection.CreateInstance(__uuidof(Connection)));
        pConnection->Open (strCnn, "", "", adConnectUnspecified);

        printf("ADO Version   : %s\n\n",(LPCSTR) pConnection->Version);
        printf("DBMS Name   : %s\n\n",(LPCSTR) (_bstr_t) 
            pConnection->Properties->GetItem("DBMS Name")->Value);
        printf("DBMS Version   : %s\n\n",(LPCSTR) (_bstr_t)
            pConnection->Properties->GetItem("DBMS Version")->Value);
        printf("OLE DB Version   : %s\n\n",(LPCSTR) (_bstr_t) 
            pConnection->Properties->GetItem("OLE DB Version")->Value);
        printf("Provider Name   : %s\n\n",(LPCSTR) (_bstr_t) 
            pConnection->Properties->GetItem("Provider Name")->Value);
        printf("Provider Version   : %s\n\n",(LPCSTR) (_bstr_t) 
            pConnection->Properties->GetItem("Provider Version")->Value);
        printf("Driver Name   : %s\n\n",(LPCSTR) (_bstr_t) 
            pConnection->Properties->GetItem("Driver Name")->Value);
        printf("Driver Version   : %s\n\n",(LPCSTR) (_bstr_t) 
            pConnection->Properties->GetItem("Driver Version")->Value);
        printf("Driver ODBC Version   : %s\n\n",(LPCSTR) (_bstr_t) 
            pConnection->Properties->GetItem("Driver ODBC Version")->Value);

    }

    catch (_com_error &e) {
        // Notify the user of errors if any.
        PrintProviderError(pConnection);
        PrintComError(e);
    }

    if (pConnection)
        if (pConnection->State == adStateOpen)
            pConnection->Close();
}

void PrintProviderError(_ConnectionPtr pConnection) {
    // Print Provider Errors from Connection object.
    // pErr is a record object in the Connection's Error collection.
    ErrorPtr pErr = NULL;

    if ( (pConnection->Errors->Count) > 0) {
        long nCount = pConnection->Errors->Count;
        // Collection ranges from 0 to nCount -1.
        for ( long i = 0 ; i < nCount ; i++) {
            pErr = pConnection->Errors->GetItem(i);
            printf("Error number: %x\t%s\n", pErr->Number, (LPCSTR) pErr->Description);
        }
    }
}

void PrintComError(_com_error &e) {
   _bstr_t bstrSource(e.Source());
   _bstr_t bstrDescription(e.Description());

    // Print Com errors.
   printf("Error\n");
   printf("\tCode = %08lx\n", e.Error());
   printf("\tCode meaning = %s\n", e.ErrorMessage());
   printf("\tSource = %s\n", (LPCSTR) bstrSource);
   printf("\tDescription = %s\n", (LPCSTR) bstrDescription);
}
Show:
© 2014 Microsoft