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ADOStreamConstruction Interface

  • Artikkeli

The ADOStreamConstruction interface is used to construct an ADO Stream object from an OLE DB IStream object in a C/C++ application.

Properties

Property Description
Stream Read/Write. Gets/sets an OLE DB Stream object.

Methods

None.

Events

None.

Remarks

Given an OLE DB IStream object (pStream), the construction of an ADO Stream object (adoStr) amounts to the following three basic operations:

  1. Create an ADO Stream object:

    Stream20Ptr adoStr;  
adoStr.CreateInstance(__uuidof(Stream));

  2. Query the IADOStreamConstruction interface on the Stream object:

    adoStreamConstructionPtr adoStrConstruct=NULL;  
adoStr->QueryInterface(__uuidof(ADOStreamConstruction),  
                     (void**)&adoStrConstruct);

Call the IADOStreamConstruction::get_Stream property method to set the OLE DB IStream object on the ADO Stream object:

IUnknown *pUnk=NULL;  
pRowset->QueryInterface(IID_IUnknown, (void**)&pUnk);  
adoStrConstruct->put_Stream(pUnk);

The resultant adoStr object now represents the ADO Stream object constructed from the OLE DB IStream object.

Requirements

Version: ADO 2.0 or a later version

Library: msado15.dll

UUID: 00000283-0000-0010-8000-00AA006D2EA4

See Also

ADO API Reference