Ändern eines SQL Server-Authentifizierungsbenutzerkennworts (OLE DB)

Gilt für: SQL Server Azure SQL-Datenbank Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)

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Dieses Beispiel veranschaulicht die Verwendung von OLE DB zum Ändern des Kennworts eines Benutzerkontos mit SQL Server -Authentifizierung.

Beispiel

Aktualisieren Sie vor dem Erstellen den C++-Code, um die Benutzer-ID, das alte Kennwort und das neue Kennwort anzugeben.

Diese Anwendung stellt eine Verbindung mit der SQL Server-Standardinstanz des Computers her. Bei einigen Windows-Betriebssystemen müssen Sie (localhost) oder (local) in den Namen der SQL Server -Instanz ändern. Ändern Sie zum Herstellen einer Verbindung mit einer benannten Instanz die Verbindungszeichenfolge von L"(local)" in L"(local)\\Name", wobei "Name" die benannte Instanz darstellt. Standardmäßig wird SQL Server Express in einer benannten Instanz installiert. Stellen Sie sicher, dass die INCLUDE-Umgebungsvariable das Verzeichnis einschließt, das „msoledbsql.h“ enthält.

Kompilieren Sie mit ole32.lib und oleaut32.lib.

Sie benötigen ein Benutzerkonto mit SQL Server-Authentifizierung, für das Sie das Kennwort kennen, um dieses Beispiel zu erstellen. Wenn Sie Anmeldungen mit SQL Server-Authentifizierung zulassen möchten, öffnen Sie SQL Server Management Studio, klicken Sie im Objekt-Explorer mit der rechten Maustaste auf den Knoten Server, und wählen Sie Eigenschaften aus. Klicken Sie auf „Sicherheit“, und aktivieren Sie den SQL Server-Modus und den Windows-Authentifizierungsmodus. Klicken Sie im Objekt-Explorer mit der rechten Maustaste auf den Knoten Sicherheit, und wählen Sie Hinzufügen aus, um ein Benutzerkonto mit SQL Server-Authentifizierung hinzuzufügen.

Auf dem Server, auf dem Sie dieses Beispiel ausführen, muss mindestens eine Anmeldung für SQL Server -Authentifizierung aktiviert sein. Der Server muss außerdem Anmeldungen über SQL Server -Authentifizierung zulassen.

// compile with: ole32.lib oleaut32.lib  
void InitializeAndEstablishConnection();  
  
#define STATUSDUMP(status)  case status : wprintf(L"status"); break;  
  
#define UNICODE  
#define DBINITCONSTANTS  
#define INITGUID  
  
#include <assert.h>  
#include <windows.h>  
#include <stdio.h>  
#include <stddef.h>  
#include <IOSTREAM>  
#include <cguid.h>  
#include <oledb.h>  
#include <oledberr.h>  
  
#include <msoledbsql.h>  
  
LPMALLOC pMalloc = NULL;  
IDBInitialize * pIDBInitialize = NULL;  
HRESULT hr;  
  
void DumpErrorInfo (IUnknown* pObjectWithError, REFIID IID_InterfaceWithError);  
void DumpErrorInfo (IUnknown* pObjectWithError, REFIID IID_InterfaceWithError, BOOL &has_sql_errors);  
  
int main() {  
   // All the initialization activities in a separate function.  
   InitializeAndEstablishConnection();  
  
   if ( FAILED( pIDBInitialize->Uninitialize() ) )  
      // Uninitialize is not required, but fails if an interface was not released.  
      printf("Problem uninitializing.\n");  
  
   pIDBInitialize->Release();  
   CoUninitialize();  
};  
  
void InitializeAndEstablishConnection() {  
   IDBProperties * pIDBProperties = NULL;  
   const ULONG nInitProps = 4;  
   DBPROP InitProperties[nInitProps];  
   const ULONG nSSInitProps = 1;  
   DBPROP SSInitProperties[nSSInitProps];  
  
   const ULONG nPropSet = 2;  
   DBPROPSET rgInitPropSet[nPropSet];  
  
   // Initialize the COM library.  
   CoInitialize(NULL);  
   CoGetMalloc(1, &pMalloc);  
  
   CLSID clsid;  
   CLSIDFromProgID(L"MSOLEDBSQL", &clsid);  
  
   // Obtain access to the SQLOLEDB provider.  
   hr = CoCreateInstance( clsid, NULL, CLSCTX_INPROC_SERVER, IID_IDBInitialize, (void **) &pIDBInitialize);  
   if (FAILED(hr))  
      printf("Failed in CoCreateInstance().\n");  
  
   // Initialize the property values needed to establish the connection.  
   for (int i = 0; i < nInitProps; i++)  
      VariantInit(&InitProperties[i].vValue);  
  
   // Specify database name.  
   InitProperties[0].dwPropertyID = DBPROP_INIT_CATALOG;  
   InitProperties[0].vValue.vt = VT_BSTR;  
   // Change the following line to use any database on your server  
   InitProperties[0].vValue.bstrVal = SysAllocString(L"master");  
   InitProperties[0].dwOptions = DBPROPOPTIONS_REQUIRED;  
   InitProperties[0].colid = DB_NULLID;  
  
   InitProperties[1].dwPropertyID = DBPROP_AUTH_USERID;  
   InitProperties[1].vValue.vt = VT_BSTR;  
   // Modify the following line to add the user ID of a SQL Server Authentication account on your server  
   InitProperties[1].vValue.bstrVal = SysAllocString(L"");  
   InitProperties[1].dwOptions = DBPROPOPTIONS_REQUIRED;  
   InitProperties[1].colid = DB_NULLID;  
  
   InitProperties[2].dwPropertyID = DBPROP_AUTH_PASSWORD;  
   InitProperties[2].vValue.vt = VT_BSTR;  
   // Modify the following line to add the new SQL Server Authentication password  
   InitProperties[2].vValue.bstrVal = SysAllocString(L"");  
   InitProperties[2].dwOptions = DBPROPOPTIONS_REQUIRED;  
   InitProperties[2].colid = DB_NULLID;  
  
   InitProperties[3].dwPropertyID = DBPROP_INIT_DATASOURCE;  
   InitProperties[3].vValue.vt = VT_BSTR;  
   InitProperties[3].vValue.bstrVal = SysAllocString(L"(local)");  
   InitProperties[3].dwOptions = DBPROPOPTIONS_REQUIRED;  
   InitProperties[3].colid = DB_NULLID;  
  
   SSInitProperties[0].dwPropertyID = SSPROP_AUTH_OLD_PASSWORD;  
   SSInitProperties[0].vValue.vt = VT_BSTR;  
   // Modify the following line to specify the existing SQL Server Authentication password  
   SSInitProperties[0].vValue.bstrVal = SysAllocString(L"");  
   SSInitProperties[0].dwOptions = DBPROPOPTIONS_REQUIRED;  
   SSInitProperties[0].colid = DB_NULLID;  
  
   rgInitPropSet[0].guidPropertySet = DBPROPSET_DBINIT;  
   rgInitPropSet[0].cProperties = nInitProps;  
   rgInitPropSet[0].rgProperties = InitProperties;  
  
   rgInitPropSet[1].guidPropertySet = DBPROPSET_SQLSERVERDBINIT;  
   rgInitPropSet[1].cProperties = nSSInitProps;  
   rgInitPropSet[1].rgProperties = SSInitProperties;  
  
   // Set initialization properties.  
   hr = pIDBInitialize->QueryInterface( IID_IDBProperties, (void **)&pIDBProperties);  
  
   if (FAILED(hr))  
      printf("Failed to obtain IDBProperties interface.\n");  
  
   hr = pIDBProperties->SetProperties( nPropSet, rgInitPropSet);  
  
   if (FAILED(hr))  
      printf("Failed to set initialization properties.\n");  
  
   pIDBProperties->Release();  
  
   // establish connection to the data source.  
   DWORD now = GetTickCount();  
  
   if ( FAILED(pIDBInitialize->Initialize()) ) {  
      printf("Problem in initializing.\n");  
      DumpErrorInfo(pIDBInitialize, IID_IDBInitialize);  
   }  
  
   DWORD tookms = GetTickCount() - now;  
   printf("Connection took %d ms.\n", tookms);  
}  
  
// DumpErrorInfo queries SQLOLEDB error interfaces, retrieving available status  
// or error information. This version is called when SQL Server errors are not expected.  
void DumpErrorInfo (IUnknown* pObjectWithError, REFIID IID_InterfaceWithError) {  
   BOOL has_sql_errors;  
   DumpErrorInfo (pObjectWithError, IID_InterfaceWithError, has_sql_errors);  
}  
  
// DumpErrorInfo queries SQLOLEDB error interfaces, retrieving available status   
// or error information. This version is called when a SQL Server error could occur.  
void DumpErrorInfo (IUnknown* pObjectWithError, REFIID IID_InterfaceWithError, BOOL &has_sql_errors ) {  
   // Interfaces used in the example.  
   IErrorInfo * pIErrorInfoAll = NULL;  
   IErrorInfo * pIErrorInfoRecord = NULL;  
   IErrorRecords * pIErrorRecords = NULL;  
   ISupportErrorInfo * pISupportErrorInfo = NULL;  
   ISQLErrorInfo * pISQLErrorInfo = NULL;  
   ISQLServerErrorInfo * pISQLServerErrorInfo = NULL;  
  
   // Number of error records.  
   ULONG nRecs;  
   ULONG nRec;  
  
   // Basic error information from GetBasicErrorInfo.  
   ERRORINFO errorinfo;  
  
   // IErrorInfo values.  
   BSTR bstrDescription;  
   BSTR bstrSource;  
  
   // ISQLErrorInfo parameters.  
   BSTR bstrSQLSTATE;  
   LONG lNativeError;  
  
   // ISQLServerErrorInfo parameter pointers.  
   SSERRORINFO * pSSErrorInfo = NULL;  
   OLECHAR * pSSErrorStrings = NULL;  
  
   // Hard-code an English (United States) locale for the example.  
   DWORD MYLOCALEID = 0x0409;  
  
   has_sql_errors = 0;  
  
   // Only ask for error information if the interface supports it.  
   if (FAILED(pObjectWithError->QueryInterface(IID_ISupportErrorInfo, (void**) &pISupportErrorInfo)))     
      wprintf(L"SupportErrorErrorInfo interface not supported\n");  
   else if (FAILED(pISupportErrorInfo->InterfaceSupportsErrorInfo(IID_InterfaceWithError)))     
      wprintf(L"InterfaceWithError interface not supported\n");  
  
   // Do not test the return of GetErrorInfo. It can succeed and return  
   // a NULL pointer in pIErrorInfoAll. Simply test the pointer.  
   GetErrorInfo(0, &pIErrorInfoAll);  
  
   // Test to see if it's a valid OLE DB IErrorInfo interface exposing a list of records.  
   if (pIErrorInfoAll != NULL)  {  
      if (SUCCEEDED(pIErrorInfoAll->QueryInterface(IID_IErrorRecords, (void**) &pIErrorRecords))) {  
         pIErrorRecords->GetRecordCount(&nRecs);  
  
         // Within each record, retrieve information from each of the defined interfaces.  
         for (nRec = 0; nRec < nRecs; nRec++) {  
            ULONG errorno = nRecs - nRec - 1;  
            // From IErrorRecords, get the HRESULT and a reference to the ISQLErrorInfo interface.  
            pIErrorRecords->GetBasicErrorInfo(errorno, &errorinfo);  
            pIErrorRecords->GetCustomErrorObject(errorno,IID_ISQLErrorInfo, (IUnknown**) &pISQLErrorInfo);  
  
            // Display the HRESULT, then use the ISQLErrorInfo.  
            wprintf(L"HRESULT:\t%#X\n", errorinfo.hrError);  
  
            if (pISQLErrorInfo != NULL) {  
               pISQLErrorInfo->GetSQLInfo(&bstrSQLSTATE, &lNativeError);  
               // Display SQLSTATE and native error values.  
               wprintf(L"SQLSTATE:\t%s\nNative Error:\t%ld\n", bstrSQLSTATE, lNativeError);  
  
               // SysFree BSTR references.  
               SysFreeString(bstrSQLSTATE);  
  
               // Get the ISQLServerErrorInfo interface from  
               // ISQLErrorInfo before releasing the reference.  
               pISQLErrorInfo->QueryInterface(IID_ISQLServerErrorInfo, (void**) &pISQLServerErrorInfo);  
  
               pISQLErrorInfo->Release();  
            }  
  
            // Test to ensure the reference is valid, then get error information from ISQLServerErrorInfo.  
            if (pISQLServerErrorInfo != NULL) {  
               pISQLServerErrorInfo->GetErrorInfo(&pSSErrorInfo, &pSSErrorStrings);  
  
               // ISQLServerErrorInfo::GetErrorInfo succeeds even when it  
               // has nothing to return. Test the pointers before using.  
               if (pSSErrorInfo) {  
                  // Display the state and severity from the returned  
                  // information. The error message comes from  
                  // IErrorInfo::GetDescription.  
                  wprintf(L"Error state:\t%d\nSeverity:\t%d\n", pSSErrorInfo->bState, pSSErrorInfo->bClass);  
                  wprintf(L"Procedure:\t%s\nLine:\t%d\n", pSSErrorInfo->pwszProcedure, pSSErrorInfo->wLineNumber);  
  
                  has_sql_errors++;  
  
                  // IMalloc::Free needed to release references on returned values.  
                  pMalloc->Free(pSSErrorStrings);  
                  pMalloc->Free(pSSErrorInfo);  
               }  
  
               pISQLServerErrorInfo->Release();  
            }  
  
            if (SUCCEEDED(pIErrorRecords->GetErrorInfo(errno, MYLOCALEID, &pIErrorInfoRecord))) {  
               // Get the source and description (error message) from the record's IErrorInfo.  
               pIErrorInfoRecord->GetSource(&bstrSource);  
               pIErrorInfoRecord->GetDescription(&bstrDescription);  
  
               if (bstrSource != NULL) {  
                  wprintf(L"Source:\t\t%s\n", bstrSource);  
                  SysFreeString(bstrSource);  
               }  
  
               if (bstrDescription != NULL) {  
                  wprintf(L"Error message:\t%s\n", bstrDescription);  
                  SysFreeString(bstrDescription);  
               }  
  
               pIErrorInfoRecord->Release();  
            }  
         }  
  
         pIErrorRecords->Release();  
      }  
      else {  
         // IErrorInfo is valid; get the source and  
         // description to see what it is.  
         pIErrorInfoAll->GetSource(&bstrSource);  
         pIErrorInfoAll->GetDescription(&bstrDescription);  
  
         if (bstrSource != NULL) {  
            wprintf(L"Source:\t\t%s\n", bstrSource);  
            SysFreeString(bstrSource);  
         }  
  
         if (bstrDescription != NULL) {  
            wprintf(L"Error message:\t%s\n", bstrDescription);  
            SysFreeString(bstrDescription);  
         }  
      }  
  
      pIErrorInfoAll->Release();  
   }  
   else  
      wprintf(L"GetErrorInfo failed.\n");  
  
   if (pISupportErrorInfo != NULL)  
      pISupportErrorInfo->Release();  
}