MDAC 2.5 SDK - OLE DB Programmer's Reference
OLE DB Interfaces
Given a handle of a row in a rowset, IGetRow::GetURLFromHROW returns the URL for that row.
HRESULT GetURLFromHROW(
HROW hRow,
LPOLESTR * ppwszURL);
}
Parameters
hRow
[in]
The row handle (HROW).
Caution The consumer must ensure that hRow contains a valid row handle because the provider might not validate hRow before using it. The result of passing the handle of a deleted row is provider-specific, although the provider must not terminate abnormally. For example, the provider might return DB_E_BADROWHANDLE or DB_E_DELETEDROW, or it might get data from a different row. The result of passing an invalid row handle in hRow is undefined.
ppwszURL
[out]
A pointer to provider-allocated memory in which to return the canonical URL for the row. The consumer is responsible for freeing this memory with IMalloc::Free when it no longer needs the URL. If IGetRow::GetURLFromHROW returns an error, *ppwszURL is set to NULL.
Return Code
S_OK
The URL was successfully returned.
E_FAIL
A provider-specific error occurred.
E_INVALIDARG
ppwszURL was a null pointer.
E_UNEXPECTED
ITransaction::Commit or ITransaction::Abort was called, and the row object is in a zombie state.
DB_E_BADROWHANDLE
hRow was invalid. Providers are not required to check for this condition, because doing so might slow the method significantly.
DB_E_DELETEDROW
hRow referred to a pending delete row or to a row for which a deletion had already been transmitted to the data store.
Comments
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