MDAC 2.5 SDK - ADO

Version Property Example (VC++)

See Also

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

• the current DBMS name and version.
  
  
• OLE DB version.
  
  
• provider name and version.
  
  
• ODBC version.
  
  
• ODBC driver name and version.

#import "c:\Program Files\Common Files\System\ADO\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);
void PrintProviderError(_ConnectionPtr pConnection);
void PrintComError(_com_error &e);

//////////////////////////////////////////////////////////
//                                                      //
//       Main Function                                  //
//                                                      //
//////////////////////////////////////////////////////////

void main()
{
    if(FAILED(::CoInitialize(NULL)))
        return;

    VersionX();

    ::CoUninitialize();
}

//////////////////////////////////////////////////////////
//                                                      //
//         VersionX Function                            //
//                                                      //
//////////////////////////////////////////////////////////
void VersionX(void) 
{
   HRESULT   hr = S_OK;

    // Define string variables.
   _bstr_t strCnn("driver={SQL Server};server=srv;"
            "user id=sa;password=;database=Pubs;");

    // 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, "", "", NULL);

        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);

        pConnection->Close();
    }

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

//////////////////////////////////////////////////////////
//                                                      //
//     PrintProviderError Function                      //
//                                                      //
//////////////////////////////////////////////////////////
void PrintProviderError(_ConnectionPtr pConnection)
{
    // Print Provider Errors from Connection object.
    // pErr is a record object in the Connection’s Errors 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);
        }
    }
}

//////////////////////////////////////////////////////////
//                                                      //
//      PrintComError Function                          //
//                                                      //
//////////////////////////////////////////////////////////
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);
}