Using an Existing ADO Recordset

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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