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Using an Existing ADO Recordset

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The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at Using an Existing ADO Recordset.

To mix OLE DB consumer templates and Active Data Objects (ADO), use ADO to open a recordset (corresponding to a rowset in the OLE DB Consumer Templates). When you have a recordset, do the following to connect to an OLE DB rowset:

  1. Call QueryInterface for the IRowset and IAccessor pointers.

    IRowset* lpRowset = NULL;  
IAccessor* lpAccessor = NULL;  
lpUnk->QueryInterface(IID_IRowset, (void**)&lpRowset);  
lpUnk->QueryInterface(IID_IAccessor, (void**)&lpAccessor);

    Note

    lpUnk points to the IUnknown object of the ADO recordset.

  2. Attach the accessor and rowset to their appropriate OLE DB consumer template classes.

    CRowset rs;  
CAccessor accessor;  

accessor.AddAccessorInfo(0ul);      // 0 is the ordinal of an ADO accessor  
rs.m_spRowset.Attach(lpRowset);      // use the Attach method of CComPtr<>  
rs.SetAccessor(accessor);

See Also

Using Accessors