OLE DB Programmer's Reference | |
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
None
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