ADOStreamConstruction Interface

项目
06/29/2006

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

This interface supports the following properties:

Properties

Stream

Read/Write.
Gets/sets an OLE DB IStream 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:

Create an ADO Stream object:

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

Query the IADOStreamConstruction interface on the Stream object:

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

Call the IADOStreamConstruction::put_Stream property method to set the OLE DB IStream object on the ADO Stream object:
```
IUnknown *pUnk=NULL;
pStream->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 and later

Library: msado15.dll

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

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